JSXGraph 1.11.0beta1 Reference

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Elements

• Angle
• Arc
• Arrow
• Arrowparallel
• Axes3D
• Axis
• Axis3D
• Bisector
• Bisectorlines
• Boxplot
• Button
• Cardinalspline
• Chart
• Checkbox
• Circle
• Circle3D
• Circumcenter
• Circumcircle
• CircumcircleArc
• CircumcircleSector
• Comb
• Conic
• Curve
• Curve3D
• CurveDifference
• CurveIntersection
• CurveUnion
• Derivative
• Ellipse
• ForeignObject
• Functiongraph
• Functiongraph3D
• Glider
• Grid
• Group
• Hatch
• Hyperbola
• Image
• ImplicitCurve
• Incenter
• Incircle
• Inequality
• Input
• Integral
• Intersection
• IntersectionCircle3D
• IntersectionLine3D
• Label
• Legend
• Line
• Line3D
• MajorArc
• MajorSector
• Measurement
• Mesh3D
• Metapostspline
• Midpoint
• MinorArc
• MinorSector
• mirrorelement
• Mirrorpoint
• NonReflexAngle
• Normal
• Orthogonalprojection
• OtherIntersection
• Parabola
• Parallel
• Parallelogram
• Parallelpoint
• ParametricSurface3D
• Perpendicular
• PerpendicularPoint
• PerpendicularSegment
• Point
• Point3D
• PolarLine
• PolePoint
• Polygon
• PolygonalChain
• RadicalAxis
• Reflection
• ReflexAngle
• RegularPolygon
• Riemannsum
• Sector
• Segment
• Semicircle
• Slider
• Slopefield
• Slopetriangle
• Smartlabel
• Sphere3D
• Spline
• Stepfunction
• Tangent
• TangentTo
• Tapemeasure
• Text
• Text3D
• Ticks
• Ticks3D
• Tracecurve
• Transformation
• Turtle
• Vectorfield
• Vectorfield3D
• View3D

Classes

• _global_
• JXG
• JXG.AbstractRenderer
• JXG.Board
• JXG.Board.infobox
• JXG.C
• JXG.CA
• JXG.CanvasRenderer
• JXG.Chart
• JXG.Circle
• JXG.Circle3D
• JXG.Complex
• JXG.Composition
• JXG.Coords
• JXG.CoordsElement
• JXG.Curve
• JXG.Curve3D
• JXG.Dump
• JXG.EventEmitter
• JXG.Expect
• JXG.ForeignObject
• JXG.GeometryElement
• JXG.GeometryElement3D
• JXG.GeonextParser
• JXG.Group
• JXG.Image
• JXG.JessieCode
• JXG.JSXGraph
• JXG.Legend
• JXG.Line
• JXG.Line3D
• JXG.Math
• JXG.Math.BoxQuadtree
• JXG.Math.Clip
• JXG.Math.Extrapolate
• JXG.Math.Geometry
• JXG.Math.ImplicitPlot
• JXG.Math.IntervalArithmetic
• JXG.Math.Metapost
• JXG.Math.Nlp
• JXG.Math.Numerics
• JXG.Math.Plot
• JXG.Math.Poly
• JXG.Math.Poly.Monomial
• JXG.Math.Poly.Polynomial
• JXG.Math.Poly.Ring
• JXG.Math.ProbFuncs
• JXG.Math.Quadtree
• JXG.Math.Statistics
• JXG.NoRenderer
• JXG.Options
• JXG.Plane3D
• JXG.Point
• JXG.Point3D
• JXG.Polygon
• JXG.Polygon3D
• JXG.PrefixParser
• JXG.Sphere3D
• JXG.Surface3D
• JXG.SVGRenderer
• JXG.Text
• JXG.Text3D
• JXG.Ticks
• JXG.Transformation
• JXG.Turtle
• JXG.Util
• JXG.Util.Base64
• JXG.Util.Unzip
• JXG.Util.UTF8
• JXG.View3D
• JXG.VMLRenderer
• JXG.XML

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Namespace JXG

      ↳ JXG

Defined in: jxg.js.

Namespace Summary

Constructor Attributes	Constructor Name and Description
	JXG JXG is the top object of JSXGraph and defines the namespace

Field Summary

Field Attributes	Field Name and Description
<static>	JXG.boards Store a reference to every board in this central list.
<static>	JXG.COORDS_BY_SCREEN Constant: screen coordinates in pixel relative to the upper left corner of the div element.
<static>	JXG.COORDS_BY_USER Constant: user coordinates relative to the coordinates system defined by the bounding box.
<static>	JXG.elements Associative array that keeps track of all constructable elements registered via JXG.registerElement.
<static>	JXG.FileReader The FileReader object bundles the file input capabilities of JSXGraph.
<static>	JXG.ieVersion Internet Explorer version.
<static>	JXG.isBrowser A document/window environment is available.
<static>	JXG.licenseText Constant: the small gray version indicator in the top left corner of every JSXGraph board (if showCopyright is not set to false on board creation).
<static>	JXG.palette Default color palette.
<static>	JXG.paletteWong Bang Wong color palette, optimized for various type of color blindness.
<static>	JXG.readers Store the available file readers in this structure.
<static>	JXG.Validator Holds all possible properties and the according validators for geometry elements.
<static>	JXG.version Constant: the currently used JSXGraph version.

Method Summary

Method Attributes	Method Name and Description
<private> <static>	JXG._ceil10(value, exp) "Ceil" a number to given number of decimal digits.
<private> <static>	JXG._decimalAdjust(type, value, exp) Decimal adjustment of a number.
<private> <static>	JXG._floor10(value, exp) "Floor" a number to given number of decimal digits.
<private> <static>	JXG._round10(value, exp) Round a number to given number of decimal digits.
<static>	JXG.addEvent(obj, type, fn, owner, options) Adds an event listener to a DOM element.
<static>	JXG.autoDigits(val) Truncate a number val automatically.
<static>	JXG.autoHighlight(color) Determines highlight color to a given color.
<static>	JXG.bind(fn, owner) Generates a function which calls the function fn in the scope of owner.
<static>	JXG.capitalize(str) Makes a string lower case except for the first character which will be upper case.
<static>	JXG.clearVisPropOld(el) Resets visPropOld.
<static>	JXG.clone(obj) This outputs an object with a base class reference to the given object.
<static>	JXG.cloneAndCopy(obj, obj2) Embeds an existing object into another one just like #clone and copies the contents of the second object to the new one.
<static>	JXG.cmpArrays(a1, a2) Compare two arrays.
<static>	JXG.concat(dest, src) Concat array src to array dest.
<static>	JXG.contrast(hexColor, darkColor, lightColor, threshold) Calculate whether a light or a dark color is needed as a contrast.
<static>	JXG.coordsArrayToMatrix(coords, split) Converts an array of JXG.Coords objects into a coordinate matrix.
<static>	JXG.copyAttributes(attributes, options, s) Generates an attributes object that is filled with default values from the Options object and overwritten by the user specified attributes.
<private> <static>	JXG.copyPrototypeMethods(subObj, superObj, constructorName) Copy all prototype methods from object "superObject" to object "subObject".
<static>	JXG.createEvalFunction(board, param, n) Convert a String, a number or a function into a function.
<static>	JXG.createFunction(term, board, variableName, evalGeonext) Convert a String, number or function into a function.
<static>	JXG.createHTMLSlider(board, parents, attributes) [[x,y], [w px, h px], [range]
<static>	JXG.cssParse(styles) Converts a given CSS style string into a JavaScript object.
<static>	JXG.cssStringify(styles) Converts a given object into a CSS style string.
<static>	JXG.darkenColor(color, percent) Darkens the color by the specified factor.
<static>	JXG.debug(s) Add something to the debug log.
<static>	JXG.debugInt(s) Add something to the debug log.
<static>	JXG.debugLine(s) Add something to the debug log.
<static>	JXG.debugWST(s) Add something to the debug log.
<static>	JXG.deepCopy(obj, obj2, toLower) Creates a deep copy of an existing object, i.e.
<static>	JXG.def(v, d) Handle default parameters.
<static>	JXG.defineConstant(object, name, value, ignoreRedefine) Set a constant name in object to value.
<static>	JXG.deprecated(what, replacement) This method issues a warning to the developer that the given function is deprecated and, if available, offers an alternative to the deprecated function.
<static>	JXG.eliminateDuplicates(a) Eliminates duplicate entries in an array consisting of numbers and strings.
<static>	JXG.escapeHTML(str) Replaces all occurences of & by &amp;, > by &gt;, and < by &lt;.
<static>	JXG.evalSlider(s) If s is a slider, it returns the sliders value, otherwise it just returns the given value.
<static>	JXG.evaluate(val) If val is a function, it will be evaluated without giving any parameters, else the input value is just returned.
<static>	JXG.exists(v, checkEmptyString) Checks if a given variable is neither undefined nor null.
<static>	JXG.extend(object, extension, onlyOwn, toLower) Copy all properties of the extension object to object.
<static>	JXG.extendConstants(object, constants, onlyOwn, toUpper) Copy all properties of the constants object in object as a constant.
<static>	JXG.filterElements(list, filter) Filter an array of elements.
<static>	JXG.getBoardByContainerId(s) s may be the string containing the id of an HTML tag that hosts a JSXGraph board.
<private> <static>	JXG.getCloneObject(el) Create a stripped down version of a JSXGraph element for cloning to the background.
<static>	JXG.getCSSTransform(cPos, obj) Correct position of upper left corner in case of a CSS transformation.
<static>	JXG.getCSSTransformMatrix(obj) Scaling CSS transformations applied to the div element containing the JSXGraph constructions are determined.
<static>	JXG.getDimensions(elementId, doc) Reads the width and height of an HTML element.
<static>	JXG.getNumberOfTouchPoints(evt) Determines the number of touch points in a touch event.
<static>	JXG.getOffset(obj) Calculates recursively the offset of the DOM element in which the board is stored.
<static>	JXG.getPosition(e, index, doc) Cross browser mouse / pointer / touch coordinates retrieval relative to the documents's top left corner.
<static>	JXG.getProp(el, css) Reads css style sheets of a given element.
<static> <deprecated>	JXG.getRef(board, s) s may be a string containing the name or id of an element or even a reference to the element itself.
<static> <deprecated>	JXG.getReference(board, s) This is just a shortcut to JXG.getRef.
<static>	JXG.getStyle(obj, stylename) Access CSS style sheets.
<static> <deprecated>	JXG.hex2rgb(hex) Converts a valid HTML/CSS color string from the '#rrggbb' format into the 'rgb(r, g, b)' format.
<static>	JXG.hsv2rgb(H, S, V) Converts HSV color to RGB color.
<static>	JXG.indexOf(array, value, sub) Search an array for a given value.
<static>	JXG.isAndroid() Detects if the user is using an Android powered device.
<static>	JXG.isApple() Detects if the user is using a Apple iPad / iPhone.
<static>	JXG.isArray(v) Checks if a given variable references an array.
<static>	JXG.isBoard(v) Checks if the given object is an JSXGraph board.
<static>	JXG.isDesktop() Detects if the user is using a desktop device, see https://stackoverflow.com/a/61073480.
<static>	JXG.isDocumentOrFragment(v) Tests if the input variable is a DOM Document or DocumentFragment node
<static>	JXG.isEmpty(v) Checks if v is an empty object or empty.
<static>	JXG.isFirefoxOS() Detects if the user is using a firefoxOS powered device.
<static>	JXG.isFirstTouch(evt) Checks whether an mouse, pointer or touch event evt is the first event of a multitouch event.
<static>	JXG.isFunction(v) Checks if a given variable references a function.
<static>	JXG.isGroup(board, s) Checks if the given string is a group id within the given board.
<static>	JXG.isId(board, s) Checks if the given string is an id within the given board.
<static>	JXG.isInArray(arr, val) Checks if an array contains an element equal to val but does not check the type!
<static>	JXG.isInObject(obj, val) Checks if an object contains a key, whose value equals to val.
<static>	JXG.isMetroApp() Returns true if the run inside a Windows 8 "Metro" App.
<static>	JXG.isMobile() Detects if the user is using a mobile device, see https://stackoverflow.com/questions/25542814/html5-detecting-if-youre-on-mobile-or-pc-with-javascript.
<static>	JXG.isMouseEvent(evt) Determines whether evt is neither a touch event nor a pointer event.
<static>	JXG.isMozilla() Detects if the user is using a Mozilla browser
<static>	JXG.isName(board, s) Checks if the given string is a name within the given board.
<static>	JXG.isNode() True, if run inside a node.js environment.
<static>	JXG.isNumber(v, acceptStringNumber, acceptNaN) Checks if the value of a given variable is of type number.
<static>	JXG.isObject(v) Tests if the input variable is an Object
<static>	JXG.isPoint(v) Checks if a given variable is a reference of a JSXGraph Point element.
<static>	JXG.isPoint3D(v) Checks if a given variable is a reference of a JSXGraph Point3D element.
<static>	JXG.isPointerEvent(evt) Determines whether evt is a pointer event.
<static>	JXG.isPointType(board, v) Checks if a given variable is a reference of a JSXGraph Point element or an array of length at least two or a function returning an array of length two or three.
<static>	JXG.isPointType3D(board, v) Checks if a given variable is a reference of a JSXGraph Point3D element or an array of length three or a function returning an array of length three.
<static>	JXG.isString(v) Checks if the value of a given variable is of type string.
<static>	JXG.isTouchDevice() Determine if the current browser supports touch events
<static>	JXG.isTouchEvent(evt) Determines whether evt is a touch event.
<static>	JXG.isTransformationOrArray(v) Checks if a given variable is a reference of a JSXGraph transformation element or an array of JSXGraph transformation elements.
<static>	JXG.isWebkitAndroid() Detects if the user is using the default Webkit browser on an Android powered device.
<static>	JXG.isWebkitApple() Detects if the user is using Safari on an Apple device.
<static>	JXG.isWebWorker() True if run inside a webworker environment.
<static>	JXG.keys(object, onlyOwn) Extracts the keys of a given object.
<static>	JXG.keysToLowerCase(obj) Convert a n object to a new object containing only lower case properties.
<static>	JXG.lightenColor(color, percent) Lightens the color by the specified factor.
<static>	JXG.LMS2rgb(l, m, s) Convert color information from LMS to RGB color space.
<static>	JXG.merge(obj1, obj2) Recursively merges obj2 into obj1 in-place.
<static>	JXG.mergeAttr(attr, special, toLower, ignoreUndefinedSpecials) In-place (deep) merging of attributes.
<static>	JXG.normalizePointFace(s) All point faces can be defined with more than one name, e.g.
<static>	JXG.parseNumber(v, percentOfWhat, convertPx) Convert value v.
<static>	JXG.parsePosition(str) Parse a string for label positioning of the form 'left pos' or 'pos right' and return e.g.
<static>	JXG.providePoints(board, parents, attrClass, attrArray, attrArray) Test if the parents array contains existing points.
<static>	JXG.providePoints3D(view, parents, attrClass, attrArray, attrArray) Test if the parents array contains existing points.
<static>	JXG.registerElement(element, creator) This registers a new construction element to JSXGraph for the construction via the JXG.Board.create interface.
<static>	JXG.registerReader(reader, ext) Register a file reader.
<static>	JXG.removeAllEvents(obj, type, owner) Removes all events of the given type from a given DOM node; Use with caution and do not use it on a container div of a JXG.Board because this might corrupt the event handling system.
<static>	JXG.removeElementFromArray(ar, el) Removes an element from the given array
<static>	JXG.removeEvent(obj, type, fn, owner) Removes an event listener from a DOM element.
<static>	JXG.rgb2bw(color) Decolorizes the given color.
<static>	JXG.rgb2cb(color, deficiency) Converts a color into how a colorblind human approximately would see it.
<static>	JXG.rgb2css(color, ag, ab) Converts a valid HTML/CSS color string into a string of the 'rgb(r, g, b)' format.
<static>	JXG.rgb2hex(color, ag, ab) Converts a valid HTML/CSS color string into a HTML rgb string.
<static>	JXG.rgb2hsv(color, ag, ab) Converts a color from the RGB color space into the HSV space.
<static>	JXG.rgb2LMS(color, ag, ab) Converts a color from the RGB color space into the LMS space.
<static>	JXG.rgba2rgbo(rgba) Splits a RGBA color value like #112233AA into it's RGB and opacity parts.
<static>	JXG.rgbo2rgba(rgb, o) Generates a RGBA color value like #112233AA from it's RGB and opacity parts.
<static>	JXG.rgbParser(color, ag, ab) Converts a valid HTML/CSS color string into a rgb value array.
<static>	JXG.sanitizeHTML(str, caja) Convert HTML tags to entities or use html_sanitize if the google caja html sanitizer is available.
<private> <static>	JXG.scaleJSXGraphDiv(wrap_id, inner_id, doc, scale) Scale and vertically shift a DOM element (usually a JSXGraph div) inside of a parent DOM element which is set to fullscreen.
<static>	JXG.setClassicColors() Use the color scheme of JSXGraph up to version 1.3.2.
<static>	JXG.shadeColor(color, percent) Lightens (percent > 0) or darkens (percent < 0) the color by the specified factor.
<static>	JXG.shortcut(object, fun) Creates a shortcut to a method, e.g.
<static>	JXG.stack2jsxgraph(str) Convert a string containing a MAXIMA /STACK expression into a JSXGraph / JessieCode string or an array of JSXGraph / JessieCode strings.
<static>	JXG.str2Bool(s) Converts a string containing either true or false into a boolean value.
<static>	JXG.supportsCanvas() Detect browser support for Canvas.
<static>	JXG.supportsES6() Features of ECMAScript 6+ are available.
<static>	JXG.supportsPointerEvents() Checks if the environments supports the W3C Pointer Events API https://www.w3.org/TR/pointerevents/
<static>	JXG.supportsSVG() Detect browser support for SVG.
<static>	JXG.supportsVML() Detect browser support for VML.
<static>	JXG.swap(arr, i, j) Swaps to array elements.
<static>	JXG.timedChunk(items, process, context, callback) Process data in timed chunks.
<static>	JXG.toFixed(num, digits) Replacement of the default toFixed() method.
<static>	JXG.toFraction(x, useTeX, order) Convert a floating point number to a string integer + fraction.
<static>	JXG.toJSON(obj, noquote) Converts a JavaScript object into a JSON string.
<static>	JXG.trim(str) Remove all leading and trailing whitespaces from a given string.
<static>	JXG.trimNumber(str) Make numbers given as strings nicer by removing all unnecessary leading and trailing zeroes.
<static>	JXG.trunc(n, p) Truncate a number n after p decimals.
<static>	JXG.unescapeHTML(str) Eliminates all substrings enclosed by < and > and replaces all occurences of &amp; by &, &gt; by >, and &lt; by <.
<static>	JXG.uniqueArray(arr) Generates a copy of an array and removes the duplicate entries.
<static>	JXG.useBlackWhiteOptions(board) Converts all color values to greyscale and calls useStandardOption to put them onto the board.
<static>	JXG.useStandardOptions(board) Apply the options stored in this object to all objects on the given board.
<static>	JXG.warn(warning) Outputs a warning via console.warn(), if available.

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Default Value:

false

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var p = board.create('line', [[-1, 1], [2, -3]], {strokeColor: JXG.palette.yellow});

See:

JXG.paletteWong

Default Value:

JXG.paletteWong

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var p = board.create('line', [[-1, 1], [2, -3]], {strokeColor: JXG.paletteWong.yellow});

See:

JXG.palette

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Parameters:

{Number} value

Number to be ceiled

{Number} exp

Number of decimal digits given as negative exponent

Returns:

{Number} "Ceiled" number.

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Parameters:

{String} type

The type of adjustment.

{Number} value

The number.

{Number} exp

The exponent (the 10 logarithm of the adjustment base).

Returns:

{Number} The adjusted value.

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Parameters:

{Number} value

Number to be floored

{Number} exp

Number of decimal digits given as negative exponent

Returns:

{Number} "Floored" number.

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Parameters:

{Number} value

Number to be rounded

{Number} exp

Number of decimal digits given as negative exponent

Returns:

{Number} Rounded number.

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Parameters:

{Object} obj

Reference to a DOM node.

{String} type

The event to catch, without leading 'on', e.g. 'mousemove' instead of 'onmousemove'.

{Function} fn

The function to call when the event is triggered.

{Object} owner

The scope in which the event trigger is called.

{Object|Boolean} options Optional, Default: false

This parameter is passed as the third parameter to the method addEventListener. Depending on the data type it is either an options object or the useCapture Boolean.

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Parameters:

val

Returns:

{Number}

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Parameters:

{String} color

HTML RGBA string containing the HTML color code.

Returns:

{String} Returns a HTML RGBA color string

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Parameters:

{Function} fn

Function to call.

{Object} owner

Scope in which fn is executed.

Returns:

{Function} A function with the same signature as fn.

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Parameters:

{String} str

Arbitrary string

Returns:

{String} The capitalized string.

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Parameters:

{JXG.GeometryElement} el

Returns:

{GeometryElement}

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Parameters:

{Object} obj

Object to be embedded.

Returns:

{Object} An object with a base class reference to obj.

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Parameters:

{Object} obj

Object to be copied.

{Object} obj2

Object with data that is to be copied to the new one as well.

Returns:

{Object} Copy of given object including some new/overwritten data from obj2.

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Parameters:

{Array} a1

{Array} a2

Returns:

{Boolean} true, if the arrays coefficients are of same type and value.

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Parameters:

{Array} dest

{Array} src

Returns:

Array

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Parameters:

{String} hexColor

HEX value of color.

{String} darkColor Optional, Default: "#000000"

HEX string for a dark color.

{String} lightColor Optional, Default: "#ffffff"

HEX string for a light color.

{Number} threshold Optional, Default: 8

Returns:

{String} Returns darkColor or lightColor.

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Parameters:

{Array} coords

{Boolean} split

Returns:

{Array}

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Parameters:

{Object} attributes

user specified attributes

{Object} options

defaults options

{String} s

variable number of strings, e.g. 'slider', subtype 'point1'. Must be provided in lower case!

Returns:

{Object} The resulting attributes object

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Parameters:

{Object} subObj

A JavaScript object which receives new methods.

{Object} superObj

A JavaScript object which lends its prototype methods to subObject

constructorName

Returns:

{String} constructorName Under this name the constructor of superObj will be available in subObject.

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Parameters:

{JXG.Board} board

Reference to a JSXGraph board. It is required to resolve dependencies given by a JessieCode string, thus it must be a valid reference only in case one of the param values is of type string.

{Array} param

An array containing strings, numbers, or functions.

{Number} n

Length of param.

Returns:

{Function} A function taking one parameter k which specifies the index of the param element to evaluate.

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Parameters:

{String|Number|Function} term

A variable of type string, function or number.

{JXG.Board} board

Reference to a JSXGraph board. It is required to resolve dependencies given by a JessieCode/GEONE_XT string, thus it must be a valid reference only in case one of the param values is of type string.

{String} variableName

Only required if function is supplied as JessieCode string or evalGeonext is set to true. Describes the variable name of the variable in a JessieCode/GEONE_XT string given as term.

{Boolean} evalGeonext Optional, Default: false

Obsolete and ignored! Set this true if term should be treated as a GEONE_XT string.

Returns:

{Function} A function evaluating the value given by term or null if term is not of type string, function or number.

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Parameters:

board

parents

attributes

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Parameters:

{String} styles

String containing CSS styles.

Returns:

{Object} Object containing CSS styles.

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Parameters:

{Object} styles

Object containing CSS styles.

Returns:

{String} String containing CSS styles.

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Parameters:

{String} color

{Number} percent

Returns:

{String}

See:

JXG.shadeColor

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Parameters:

s

An arbitrary number of parameters.

See:

JXG.debugWST

JXG.debugLine

JXG.debugInt

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Parameters:

s

An arbitrary number of parameters.

See:

JXG.debugWST

---

Parameters:

s

An arbitrary number of parameters.

See:

JXG.debug

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Parameters:

s

An arbitrary number of parameters.

See:

JXG.debug

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Parameters:

{Object} obj

This object will be copied.

{Object} obj2

This object will merged into the newly created object

{Boolean} toLower Optional, Default: false

If true the keys are convert to lower case. This is needed for visProp, see JXG#copyAttributes

Returns:

{Object} copy of obj or merge of obj and obj2.

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Parameters:

v

Given value

d

Default value

Returns:

d, if v is undefined or null.

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Parameters:

{Object} object

{String} name

{Number|String|Boolean} value

{Boolean} ignoreRedefine

This should be left at its default: false.

---

Parameters:

{String} what

Describes the function that is deprecated

{String} replacement Optional

The replacement that should be used instead.

---

Parameters:

{Array} a

An array of numbers and/or strings.

Returns:

{Array} The array with duplicate entries eliminated.

---

Parameters:

{String} str

Returns:

{String}

---

Parameters:

{*} s

Returns:

{*} s.Value() if s is an element of type slider, s otherwise

---

Parameters:

val

Could be anything. Preferably a number or a function.

Returns:

If val is a function, it is evaluated and the result is returned. Otherwise val is returned.

---

Parameters:

v

A variable of any type.

{Boolean} checkEmptyString Optional, Default: false

If set to true, it is also checked whether v is not equal to ''.

Returns:

{Boolean} True, if v is neither undefined nor null.

---

Parameters:

{Object} object

{Object} extension

{Boolean} onlyOwn Optional, Default: false

Only consider properties that belong to extension itself, not any inherited properties.

{Boolean} toLower Optional, Default: false

If true the keys are convert to lower case. This is needed for visProp, see JXG#copyAttributes

---

Parameters:

{Object} object

{Object} constants

{Boolean} onlyOwn Optional, Default: false

Only consider properties that belong to extension itself, not any inherited properties.

{Boolean} toUpper Optional, Default: false

If true the keys are convert to lower case. This is needed for visProp, see JXG#copyAttributes

---

Parameters:

{Array} list

{Object|function} filter

Returns:

{Array}

---

Parameters:

{String} s

String of an HTML tag that hosts a JSXGraph board

Returns:

{Object} Reference to the board or null.

---

Parameters:

{JXG.GeometryElement} el

Element to be cloned

Returns:

Object Cloned element

---

Parameters:

{Array} cPos

Previously determined position

{Object} obj

A DOM element

Returns:

{Array} The corrected position.

---

Parameters:

obj

Returns:

{Array} 3x3 transformation matrix without translation part. See JXG.Board#updateCSSTransforms.

---

Parameters:

{String|Object} elementId

id of or reference to an HTML DOM node.

doc

Returns:

{Object} An object with the two properties width and height.

---

Parameters:

evt

{Event}

Returns:

{Number}

---

Parameters:

{Object} obj

A DOM element

Returns:

{Array} An array with the elements left and top offset.

---

Parameters:

{Object} e Optional

The browsers event object. If omitted, window.event will be used.

{Number} index Optional

If e is a touch event, this provides the index of the touch coordinates, i.e. it determines which finger.

{Object} doc Optional

The document object.

Returns:

{Array} Contains the position as x,y-coordinates in the first resp. second component.

---

Parameters:

{DOMElement} el

{string} css

Returns:

{number}

---

Parameters:

{JXG.Board} board

Reference to the board the element belongs to.

{String} s

String or reference to a JSXGraph element.

Deprecated:

Use JXG.Board#select

Returns:

{Object} Reference to the object given in parameter object

---

Parameters:

board

s

Deprecated:

Use JXG.Board#select.

---

Parameters:

{Object} obj

A DOM element

{String} stylename

The CSS property to read.

Returns:

The value of the CSS property and undefined if it is not set.

---

Parameters:

{String} hex

A valid HTML or CSS styled color value, e.g. '#12ab21', '#abc', or 'black'

Deprecated:

Use JXG#rgb2css instead.

Returns:

{String} A 'rgb(r, g, b)' formatted string

---

Parameters:

{Number} H

value between 0 and 360

{Number} S

value between 0.0 (shade of gray) to 1.0 (pure color)

{Number} V

value between 0.0 (black) to 1.0 (white)

Returns:

{String} RGB color string

---

Parameters:

{Array} array

value

{String} sub Optional

Use this property if the elements of the array are objects.

Returns:

{Number} The index of the first appearance of the given value, or -1 if the value was not found.

---

Returns:

{Boolean}

---

Returns:

{Boolean}

---

Parameters:

v

A variable of any type.

Returns:

{Boolean} True, if v is of type array.

---

Parameters:

{Object} v

Returns:

{Boolean}

---

Returns:

{boolean}

---

Parameters:

v

A variable of any type

---

Parameters:

v

{Object|Array}

Returns:

{boolean} True, if v is an empty object or array.

---

Returns:

{Boolean}

---

Parameters:

evt

{Event}

Returns:

{boolean}

---

Parameters:

v

A variable of any type.

Returns:

{Boolean} True, if v is a function.

---

Parameters:

{JXG.Board} board

{String} s

Returns:

{Boolean}

---

Parameters:

{JXG.Board} board

{String} s

Returns:

{Boolean}

---

Parameters:

{Array} arr

val

Returns:

{Boolean}

---

Parameters:

{Object} obj

val

Returns:

{Boolean}

---

Returns:

{Boolean}

---

Returns:

{boolean}

---

Parameters:

evt

{Event}

Returns:

{Boolean}

---

Returns:

{Boolean}

---

Parameters:

{JXG.Board} board

{String} s

Returns:

{Boolean}

---

Returns:

{Boolean}

---

Parameters:

v

A variable of any type.

{Boolean} acceptStringNumber Optional, Default: false

If set to true, the function returns true for e.g. v='3.1415'.

{Boolean} acceptNaN Optional, Default: true

If set to false, the function returns false for v=NaN.

Returns:

{Boolean} True, if v is of type number.

---

Parameters:

v

---

Parameters:

v

A variable of any type.

Returns:

{Boolean} True, if v is of type JXG.Point.

---

Parameters:

v

A variable of any type.

Returns:

{Boolean} True, if v is of type JXG.Point3D.

---

Parameters:

evt

{Event}

Returns:

{Boolean}

---

Parameters:

{JXG.Board} board

v

A variable of any type.

Returns:

{Boolean} True, if v is of type JXG.Point.

---

Parameters:

{JXG.Board} board

v

A variable of any type.

Returns:

{Boolean} True, if v is of type JXG.Point3D or an array of length at least 3, or a function returning such an array.

---

Parameters:

v

A variable of any type.

Returns:

{Boolean} True, if v is of type string.

---

Returns:

{Boolean} True, if the browser supports touch events.

---

Parameters:

evt

{Event}

Returns:

{Boolean}

---

Parameters:

v

A variable of any type.

Returns:

{Boolean} True, if v is of type JXG.Transformation.

---

Returns:

{Boolean}

---

Returns:

{Boolean}

---

Returns:

{Boolean}

---

Parameters:

object

The object the keys are to be extracted

onlyOwn

If true, hasOwnProperty() is used to verify that only keys are collected the object owns itself and not some other object in the prototype chain.

Returns:

{Array} All keys of the given object.

---

Parameters:

{Object} obj

Returns:

Object

Examples:

var attr = JXG.keysToLowerCase({radiusPoint: {visible: false}});

// return {radiuspoint: {visible: false}}

---

Parameters:

{String} color

{Number} percent

Returns:

{String}

See:

JXG.shadeColor

---

Parameters:

{Number} l

{Number} m

{Number} s

Returns:

{Array} Contains the r, g, and b value in this order.

---

Parameters:

{Object} obj1

{Object} obj2

Returns:

{Object}

See:

JXG.mergeAttr

Examples:

JXG.Options = JXG.merge(JXG.Options, {
    board: {
        showNavigation: false,
        showInfobox: true
    },
    point: {
        face: 'o',
        size: 4,
        fillColor: '#eeeeee',
        highlightFillColor: '#eeeeee',
        strokeColor: 'white',
        highlightStrokeColor: 'white',
        showInfobox: 'inherit'
    }
});

---

Parameters:

{Object} attr

Object with attributes - usually containing default options - that will be changed in-place.

{Object} special

Special option values which overwrite (recursively) the default options

{Boolean} toLower Optional, Default: true

If true the keys are converted to lower case.

{Boolean} ignoreUndefinedSpecials Optional, Default: false

If true the values in special that are undefined are not used.

See:

JXG.merge

---

Parameters:

{String} s

A string which should determine a valid point face.

Returns:

{String} Returns a normalized string or undefined if the given string is not a valid point face.

---

Parameters:

{String|Number} v

{Number} percentOfWhat

{Function|Number|*} convertPx

Returns:

{String|Number}

---

Parameters:

{String} str

Returns:

{Obj} { side, pos }

---

Parameters:

{JXG.Board} board

Board object

{Array} parents

Array containing parent elements for a new object. This array may contain

• JXG.Point objects
• JXG.GeometryElement#name of JXG.Point objects
• JXG.GeometryElement#id of JXG.Point objects
• Coordinates of points given as array of numbers of length two or three, e.g. [2, 3].
• Coordinates of points given as array of functions of length two or three. Each function returns one coordinate, e.g. [function(){ return 2; }, function(){ return 3; }]
• Function returning coordinates, e.g. function() { return [2, 3]; }

In the last three cases a new point will be created.

{String} attrClass

Main attribute class of newly created points, see JXG#copyAttributes

{Array} attrArray

List of subtype attributes for the newly created points. The list of subtypes is mapped to the list of new points.

attrArray

Returns:

{Array} List of newly created JXG.Point elements or false if not all returned elements are points.

---

Parameters:

{JXG.View3D} view

View3D object

{Array} parents

Array containing parent elements for a new object. This array may contain

• JXG.Point3D objects
• JXG.GeometryElement#name of JXG.Point3D objects
• JXG.GeometryElement#id of JXG.Point3D objects
• Coordinates of 3D points given as array of numbers of length three, e.g. [2, 3, 1].
• Coordinates of 3D points given as array of functions of length three. Each function returns one coordinate, e.g. [function(){ return 2; }, function(){ return 3; }, function(){ return 1; }]
• Function returning coordinates, e.g. function() { return [2, 3, 1]; }

In the last three cases a new 3D point will be created.

{String} attrClass

Main attribute class of newly created 3D points, see JXG#copyAttributes

{Array} attrArray

List of subtype attributes for the newly created 3D points. The list of subtypes is mapped to the list of new 3D points.

attrArray

Returns:

{Array} List of newly created JXG.Point3D elements or false if not all returned elements are 3D points.

---

Parameters:

{String} element

The elements name. This is case-insensitive, existing elements with the same name will be overwritten.

{Function} creator

A reference to a function taking three parameters: First the board, the element is to be created on, a parent element array, and an attributes object. See JXG.createPoint or any other JXG.create... function for an example.

---

Parameters:

{function} reader

A file reader. This object has to provide two methods: prepareString() and read().

{Array} ext

---

Parameters:

{Object} obj

Reference to a DOM node.

{String} type

The event to catch, without leading 'on', e.g. 'mousemove' instead of 'onmousemove'.

{Object} owner

The scope in which the event trigger is called.

---

Parameters:

{Array} ar

el

Returns:

{Array}

---

Parameters:

{Object} obj

Reference to a DOM node.

{String} type

The event to catch, without leading 'on', e.g. 'mousemove' instead of 'onmousemove'.

{Function} fn

The function to call when the event is triggered.

{Object} owner

The scope in which the event trigger is called.

---

Parameters:

{String} color

HTML string containing the HTML color code.

Returns:

{String} Returns a HTML color string

---

Parameters:

{String} color

HTML string containing the HTML color code.

{String} deficiency

The type of color blindness. Possible options are protanopia, deuteranopia, and tritanopia.

Returns:

{String} Returns a HTML color string

---

Parameters:

{String|Array|Number} color

A valid HTML or CSS styled color value, e.g. '#12ab21', '#abc', 'black' or 'rgb(12, 132, 233)'. This can also be an array containing three color values either from 0.0 to 1.0 or from 0 to 255. They will be interpreted as red, green, and blue values. In case this is a number this method expects the parameters ag and ab.

{Number} ag

{Number} ab

Returns:

{String} A 'rgb(r, g, b)' formatted string

---

Parameters:

{String|Array|Number} color

A valid HTML or CSS styled color value, e.g. '#12ab21', '#abc', 'black' or 'rgb(12, 132, 233)'. This can also be an array containing three color values either from 0.0 to 1.0 or from 0 to 255. They will be interpreted as red, green, and blue values. In case this is a number this method expects the parameters ag and ab.

{Number} ag

{Number} ab

Returns:

{String} A '#rrggbb' formatted string

---

Parameters:

{String|Array|Number} color

A valid HTML or CSS styled color value, e.g. '#12ab21', '#abc', 'black' or 'rgb(12, 132, 233)'. This can also be an array containing three color values either from 0.0 to 1.0 or from 0 to 255. They will be interpreted as red, green, and blue values. In case this is a number this method expects the parameters ag and ab. See https://www.had2know.org/technology/hsv-rgb-conversion-formula-calculator.html.

{Number} ag

{Number} ab

Returns:

{Array} Contains the h, s, and v value in this order.

---

Parameters:

{String|Array|Number} color

A valid HTML or CSS styled color value, e.g. '#12ab21', '#abc', 'black' or 'rgb(12, 132, 233)'. This can also be an array containing three color values either from 0.0 to 1.0 or from 0 to 255. They will be interpreted as red, green, and blue values. In case this is a number this method expects the parameters ag and ab.

{Number} ag

{Number} ab

Returns:

{Array} Contains the l, m, and s value in this order.

---

Parameters:

{String} rgba

A RGBA color value

Returns:

{Array} An array containing the rgb color value in the first and the opacity in the second field.

---

Parameters:

{String|Array} rgb

A valid HTML or CSS styled color value, e.g. '#12ab21', '#abc', 'black' or 'rgb(12, 132, 233)'. This can also be an array containing three color values either from 0.0 to 1.0 or from 0 to 255. They will be interpreted as red, green, and blue values.

{Number} o

The desired opacity >=0, <=1.

Returns:

{String} The RGBA color value.

---

Parameters:

{String|Array|Number} color

A valid HTML or CSS styled color value, e.g. '#12ab21', '#abc', 'black' or 'rgb(12, 132, 233)'. This can also be an array containing three color values either from 0.0 to 1.0 or from 0 to 255. They will be interpreted as red, green, and blue values. In case this is a number this method expects the parameters ag and ab.

{Number} ag

{Number} ab

Returns:

{Array} RGB color values as an array [r, g, b] with values ranging from 0 to 255.

---

Parameters:

{String} str

{Boolean} caja

Returns:

{String} Sanitized string

---

Parameters:

{String} wrap_id

id of the parent DOM element which is in fullscreen mode

{String} inner_id

id of the DOM element which is scaled and shifted

{Object} doc

document object or shadow root

{Number} scale

Relative size of the JSXGraph board in the fullscreen window.

See:

JXG.Board#toFullscreen

JXG.Board#fullscreenListener

---

See:

JXG.palette

JXG.paletteWong

Examples:

JXG.setClassicColors();
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-5, 5, 5,-5]});

---

Parameters:

{String} color

{Number} percent

Returns:

{String}

---

Parameters:

{Object} object

The object the method we want to create a shortcut for belongs to.

{String} fun

The method we want to create a shortcut for.

Returns:

{Function} A function that calls the given method.

---

Parameters:

{String} str

Returns:

String

Examples:

console.log( JXG.stack2jsxgraph("%e**x") );
// Output:
//    "EULER**x"

console.log( JXG.stack2jsxgraph("[%pi*(x**2 - 1), %phi*(x - 1), %gamma*(x+1)]") );
// Output:
//    [ "PI*(x**2 - 1)", "1.618033988749895*(x - 1)", "0.5772156649015329*(x+1)" ]

---

Parameters:

{String} s

String containing either true or false.

Returns:

{Boolean} String typed boolean value converted to boolean.

---

Returns:

{Boolean} True, if the browser supports HTML canvas.

---

---

Returns:

{Boolean}

---

Returns:

{Boolean} True, if the browser supports SVG.

---

Returns:

{Boolean} True, if the browser supports VML.

---

Parameters:

{Array} arr

{Number} i

{Number} j

Returns:

{Array} Reference to the given array.

---

Parameters:

{Array} items

to do

{Function} process

Function that is applied for every array item

{Object} context

The scope of function process

{Function} callback

This function is called after the last array element has been processed.

---

Parameters:

{Number} num

Number tp be rounded

{Number} digits

Decimal digits

Returns:

{String} Rounded number is returned as string

---

Parameters:

{Number} x

{Boolean} useTeX Optional, Default: false

{Number} order Optional, Default: 0.001

Returns:

{String}

See:

JXG.Math.decToFraction

---

Parameters:

{Object} obj

A JavaScript object, functions will be ignored.

{Boolean} noquote Optional, Default: false

No quotes around the name of a property.

Returns:

{String} The given object stored in a JSON string.

---

Parameters:

{String} str

Returns:

{String}

---

Parameters:

{String} str

Returns:

{String}

---

Parameters:

{Number} n

{Number} p

Returns:

{Number}

---

Parameters:

{String} str

Returns:

{String}

---

Parameters:

{Array} arr

Returns:

{Array}

---

Parameters:

{JXG.Board} board

The board to which objects the options will be applied.

See:

JXG.useStandardOptions

---

Parameters:

{JXG.Board} board

The board to which objects the options will be applied.

---

Parameters:

{String} warning

The warning text

---