JavaScript Example: <buttononclick="myFunction()">Click Me!</button> <script> functionmyFunction() { letx = document.getElementById("demo"); x.style.fontSize="25px"; x.style.color="red"; } </script> Try it Yourself Python
JavaScriptValidation API ❮ PreviousNext ❯ Constraint Validation DOM Methods and Properties Method/PropertyDescription checkValidity()Returns true if an input element contains valid data. setCustomValidity()Sets the validationMessage property of an input element. ...
JavaScript debugger❮ Previous JavaScript Statements Next ❯ Example With the debugger turned on, this code should stop executing before the third line: let x = 15 * 5;debugger;document.getElementbyId("demo").innerHTML = x; Try it Yourself » Description...
❮PreviousJavaScriptMath ObjectNext❯ Example leta = Math.clz32(0); letb = Math.clz32(1); letc = Math.clz32(2); letd = Math.clz32(4); Try it Yourself » Description TheMath.clz32()method returns the number of leading zeros in a 32-bit binary number. ...
Example Find out if the video is paused: varx = document.getElementById("myVideo").paused; Try it Yourself » Description The paused property returns whether the video is paused. Note:This property is read-only. Browser Support Property ...
Example lettext ="Hello World!"; letresult = text.italics(); Try it Yourself » Description String italics() is deprecated in JavaScript. Avoid using it. It may cease to work in your browser at any time. Theitalics()method returns a string embedded in an <i> tag: ...
❮ Canvas Reference Example Draw a rectangle if the point 20, 50 is in the current path: YourbrowserdoesnotsupporttheHTML5canvastag. JavaScript: constcanvas = document.getElementById("myCanvas"); constctx = canvas.getContext("2d");
Example let text = "Hello World!"; let result = text.fixed(); Try it Yourself » DescriptionString fixed() is deprecated in JavaScript. Avoid using it. It may cease to work in your browser at any time.The fixed() method returns a string embedded in a <tt> tag:<tt>string</tt>...
Example let text = "Hello World!"; let result = text.sup(); Try it Yourself » DescriptionString sup() is deprecated in JavaScript. Avoid using it. It may cease to work in your browser at any time.The sup() method returns a string embedded in a <sup> tag:<sup>string</sup>...
String strike() is deprecated in JavaScript. Avoid using it. It may cease to work in your browser at any time.The strike() method returns a string embedded in a <strike> tag:<strike>string</strike>The <strike> tag is not supported in HTML5....