# JSXGraph 1.11.1 Reference

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Class Index | File Index

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
- Face3D
- 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
- Plane3D
- Point
- Point3D
- PolarLine
- PolePoint
- Polygon
- Polygon3D
- PolygonalChain
- Polyhedron3D
- RadicalAxis
- Reflection
- ReflexAngle
- RegularPolygon
- Riemannsum
- Sector
- Segment
- Semicircle
- Slider
- Slopefield
- Slopetriangle
- Smartlabel
- Sphere3D
- Spline
- Stepfunction
- Tangent
- TangentTo
- Tapemeasure
- Text
- Text3D
- Ticks
- Ticks3D
- Tracecurve
- Transformation
- Transformation3D
- 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.Face3D
- 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

# Element Input

JXG.GeometryElement,JXG.CoordsElement
↳ JXG.Text
↳ Text
↳ Input

This element is used to provide a constructor for special texts containing a HTML form input element. For this element, the attribute "display" has to have the value 'html' (which is the default). If the width of element is set with the attribute "cssStyle", the width of the label must be added because cssStyle affects the surrounding div element.

Setting a CSS class: The attribute `cssClass` affects the HTML div element that contains the input element. To change the CSS properties of the HTML input element a selector of the form `.myinput > input { ... }` has to be used. See the analog example for buttons: Button.

Access the input element with JavaScript: The underlying HTML button element can be accessed through the sub-object 'rendNodeInput', e.g. to add event listeners.
Defined in: input.js.
Extends Text.

Element Summary
Constructor Attributes | Constructor Name and Description
--- | ---
| Input

Attributes Summary
Field Attributes | Field Name and Description
--- | ---
| disabled Control the attribute "disabled" of the HTML input field.
| maxlength Control the attribute "maxlength" of the HTML input field.

Method Summary
Method Attributes | Method Name and Description
--- | ---
| set(val) Sets value of the input element.
| Value() Returns the value (content) of the input element

Methods borrowed from class JXG.Text:
  _createFctUpdateText, _setText, bounds, checkForSizeUpdate, convertGeonext2CSS, convertGeonextAndSketchometry2CSS, convertSketchometry2CSS, crudeSizeEstimate, escapeTicks, expandShortMath, generateTerm, getAnchorX, getAnchorY, getNumberOfConflicts, getSize, hasPoint, notifyParents, poorMansTeX, replaceSub, replaceSup, setAutoPosition, setCoords, setText, setTextJessieCode, unescapeTicks, update, updateRenderer, updateSize, updateText, utf8_decode, valueTagToJessieCode
Methods borrowed from class JXG.GeometryElement:
  _set, addChild, addDescendants, addParents, addParentsFromJCFunctions, addRotation, addTicks, addTransform, animate, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, eval, evalVisProp, formatNumberLocale, fullUpdate, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getProperty, getSnapSizes, getTextAnchor, getType, handleSnapToGrid, hide, hideElement, noHighlight, normalize, prepareUpdate, remove, removeAllTicks, removeChild, removeDescendants, removeTicks, resolveShortcuts, setArrow, setAttribute, setDash, setDisplayRendNode, setLabel, setLabelText, setName, setParents, setPosition, setPositionDirectly, setProperty, show, showElement, snapToPoints, updateVisibility, useLocale
Methods borrowed from class JXG.CoordsElement:
  _anim, addAnchor, addConstraint, Coords, Dist, findClosestSnapValue, free, handleAttractors, handleSnapToPoints, makeGlider, moveAlong, moveAlongES6, moveTo, moveToES6, popSlideObject, setGliderPosition, setPositionByTransform, updateConstraint, updateCoords, updateGlider, updateGliderFromParent, updateTransform, visit, visitES6, X, XEval, Y, YEval, Z, ZEval

Events borrowed from class JXG.GeometryElement:
  attribute, attribute:key, down, drag, keydrag, mousedown, mousedrag, mousemove, mouseout, mouseover, mouseup, move, out, over, pendown, pendrag, penup, touchdown, touchdrag, touchup, up

Element Detail
Input

This element has no direct constructor. To create an instance of this element you have to call JXG.Board#create with type "input".
Possible parent array combinations are:
{number|function} x
{number|function} y
{String} value
{String|function} label
  Parent elements for input elements.

  x and y are the coordinates of the lower left corner of the text box. The position of the text is fixed, x and y are numbers. The position is variable if x or y are functions.

  The default value of the input element must be given as string.

  The label of the input element may be given as string or function.

Examples:

     // Create an input element at position [1,4].
     var input = board.create('input', [0, 1, 'sin(x)*x', 'f(x)='], {cssStyle: 'width: 100px'});
     var f = board.jc.snippet(input.Value(), true, 'x', false);
     var graph = board.create('functiongraph',[f,
             function() {
               var c = new JXG.Coords(JXG.COORDS_BY_SCREEN,[0,0],board);
               return c.usrCoords[1];
             },
             function() {
               var c = new JXG.Coords(JXG.COORDS_BY_SCREEN,[board.canvasWidth,0],board);
               return c.usrCoords[1];
             }
           ]);

     board.create('text', [1, 3, '<button onclick="updateGraph()">Update graph</button>']);

     var updateGraph = function() {
         graph.Y = board.jc.snippet(input.Value(), true, 'x', false);
         graph.updateCurve();
         board.update();
     }

    // Add the `keyup` event to an input field
    var A = board.create('point', [3, -2]);
    var i = board.create('input', [-4, -4, "1", "x "]);

    i.rendNodeInput.addEventListener("keyup", ( function () {
       var x = parseFloat(this.value);
       if (!isNaN(x)) {
    	   A.moveTo([x, 3], 100);
       }
    }));

    // Add the `change` event to an input field
    var A = board.create('point', [3, -2]);
    var i = board.create('input', [-4, -4, "1", "x "]);

    i.rendNodeInput.addEventListener("change", ( function () {
       var x = parseFloat(i.Value());
       A.moveTo([x, 2], 100);
    }));

      Apply CSS classes to label and input tag
        <style>
            div.JXGtext_inp {
                font-weight: bold;
            }

            // Label
            div.JXGtext_inp > span > span {
                padding: 3px;
            }

            // Input field
            div.JXGtext_inp > span > input {
                width: 100px;
                border: solid 4px red;
                border-radius: 25px;
            }
        </style>

    var inp = board.create('input', [-6, 1, 'x', 'y'], {
         CssClass: 'JXGtext_inp', HighlightCssClass: 'JXGtext_inp'
    });

Attribute Detail
{Boolean} disabled
Control the attribute "disabled" of the HTML input field.
Defined in: options.js.

Default Value:
  false

{Number} maxlength
Control the attribute "maxlength" of the HTML input field.
Defined in: options.js.

Default Value:
  524288 (as in HTML)

Method Detail
{JXG.GeometryElement} set(val)
Sets value of the input element.

Parameters:
{String} val

Returns:
  {JXG.GeometryElement} Reference to the element.

Examples:

            var i1 = board.create('input', [-3, 4, 'sin(x)', 'f(x)='], {cssStyle: 'width:4em', maxlength: 2});
            var c1 = board.create('checkbox', [-3, 2, 'label 1'], {});
            var b1 = board.create('button', [-3, -1, 'Change texts', function () {
                    i1.setText('g(x)');
                    i1.set('cos(x)');
                    c1.setText('label 2');
                    b1.setText('Texts are changed');
                }],
                {cssStyle: 'width:400px'});

{String} Value()
Returns the value (content) of the input element

Returns:
  {String} content of the input field.

Attributes borrowed from other Elements

Attributes borrowed from class Text:
  anchor, anchorX, anchorY, attractors, cssClass, cssDefaultStyle, cssStyle, digits, display, dragArea, fontSize, fontUnit, formatNumber, highlightCssClass, highlightCssDefaultStyle, highlightCssStyle, intl, isLabel, katexMacros, parse, rotate, snapSizeX, snapSizeY, toFraction, useASCIIMathML, useCaja, useKatex, useMathJax, visible
Attributes borrowed from class JXG.GeometryElement:
  aria, dash, dashScale, draft, dragToTopOfLayer, element3D, fillColor, fillOpacity, fixed, frozen, gradient, gradientAngle, gradientCX, gradientCY, gradientEndOffset, gradientFR, gradientFX, gradientFY, gradientR, gradientSecondColor, gradientSecondOpacity, gradientStartOffset, highlight, highlightFillColor, highlightFillOpacity, highlightStrokeColor, highlightStrokeOpacity, highlightStrokeWidth, layer, lineCap, needsRegularUpdate, nonnegativeOnly, precision, priv, rotatable, scalable, shadow, snapToGrid, strokeColor, strokeOpacity, strokeWidth, tabindex, trace, traceAttributes, transitionDuration, transitionProperties, withLabel

Fields borrowed from other Elements

Fields borrowed from class JXG.Text:
  size
Fields borrowed from class JXG.GeometryElement:
  _org_type, _pos, ancestors, baseElement, board, childElements, descendants, dump, elementClass, elType, hasLabel, highlighted, id, inherits, isDraggable, isReal, lastDragTime, methodMap, mouseover, name, needsUpdate, notExistingParents, numTraces, parents, quadraticform, rendNode, stdform, subs, symbolic, traces, transformations, type, visProp, visPropCalc
Fields borrowed from class JXG.CoordsElement:
  coords, groups, isConstrained, needsUpdateFromParent, onPolygon, position, slideObject, slideObjects

Methods borrowed from other Elements

Methods borrowed from class JXG.Text:
  _createFctUpdateText, _setText, bounds, checkForSizeUpdate, convertGeonext2CSS, convertGeonextAndSketchometry2CSS, convertSketchometry2CSS, crudeSizeEstimate, escapeTicks, expandShortMath, generateTerm, getAnchorX, getAnchorY, getNumberOfConflicts, getSize, hasPoint, notifyParents, poorMansTeX, replaceSub, replaceSup, setAutoPosition, setCoords, setText, setTextJessieCode, unescapeTicks, update, updateRenderer, updateSize, updateText, utf8_decode, valueTagToJessieCode
Methods borrowed from class JXG.GeometryElement:
  _set, addChild, addDescendants, addParents, addParentsFromJCFunctions, addRotation, addTicks, addTransform, animate, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, eval, evalVisProp, formatNumberLocale, fullUpdate, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getProperty, getSnapSizes, getTextAnchor, getType, handleSnapToGrid, hide, hideElement, noHighlight, normalize, prepareUpdate, remove, removeAllTicks, removeChild, removeDescendants, removeTicks, resolveShortcuts, setArrow, setAttribute, setDash, setDisplayRendNode, setLabel, setLabelText, setName, setParents, setPosition, setPositionDirectly, setProperty, show, showElement, snapToPoints, updateVisibility, useLocale
Methods borrowed from class JXG.CoordsElement:
  _anim, addAnchor, addConstraint, Coords, Dist, findClosestSnapValue, free, handleAttractors, handleSnapToPoints, makeGlider, moveAlong, moveAlongES6, moveTo, moveToES6, popSlideObject, setGliderPosition, setPositionByTransform, updateConstraint, updateCoords, updateGlider, updateGliderFromParent, updateTransform, visit, visitES6, X, XEval, Y, YEval, Z, ZEval

Events borrowed from other Elements

Events borrowed from class JXG.GeometryElement:
  attribute, attribute:key, down, drag, keydrag, mousedown, mousedrag, mousemove, mouseout, mouseover, mouseup, move, out, over, pendown, pendrag, penup, touchdown, touchdrag, touchup, up

Documentation generated by JsDoc Toolkit 2.4.0 on Fri Apr 04 2025 09:22:40 GMT+0200 (Mitteleuropäische Sommerzeit)