Tutorials References Exercises Videos NEW Menu
Paid Courses Website NEW

JS Reference

JS by Category JS by Alphabet


JS Array JS Boolean JS Classes JS Date JS Error JS Global JS JSON JS Math JS Number JS Operators JS RegExp JS Statements JS String


DOM Attributes DOM Document DOM Element DOM Events DOM Event Objects DOM HTMLCollection DOM Location DOM Navigator DOM Screen DOM Style
alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundColor backgroundImage backgroundPosition backgroundRepeat backgroundClip backgroundOrigin backgroundSize backfaceVisibility border borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage borderImageOutset borderImageRepeat borderImageSlice borderImageSource borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth borderRadius borderRight borderRightColor borderRightStyle borderRightWidth borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow boxSizing captionSide caretColor clear clip color columnCount columnFill columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns columnSpan columnWidth counterIncrement counterReset cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap cssFloat font fontFamily fontSize fontStyle fontVariant fontWeight fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight listStyle listStyleImage listStylePosition listStyleType margin marginBottom marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit objectPosition opacity order orphans outline outlineColor outlineOffset outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore pageBreakInside perspective perspectiveOrigin position quotes resize right scrollBehavior tableLayout tabSize textAlign textAlignLast textDecoration textDecorationColor textDecorationLine textDecorationStyle textIndent textOverflow textShadow textTransform top transform transformOrigin transformStyle transition transitionProperty transitionDuration transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign visibility width wordBreak wordSpacing wordWrap widows zIndex
DOM Window

Web APIs

API Console API Geolocation API History API Storage

HTML Objects

<a> <abbr> <address> <area> <article> <aside> <audio> <b> <base> <bdo> <blockquote> <body> <br> <button> <canvas> <caption> <cite> <code> <col> <colgroup> <datalist> <dd> <del> <details> <dfn> <dialog> <div> <dl> <dt> <em> <embed> <fieldset> <figcaption> <figure> <footer> <form> <head> <header> <h1> - <h6> <hr> <html> <i> <iframe> <img> <ins> <input> button <input> checkbox <input> color <input> date <input> datetime <input> datetime-local <input> email <input> file <input> hidden <input> image <input> month <input> number <input> password <input> radio <input> range <input> reset <input> search <input> submit <input> text <input> time <input> url <input> week <kbd> <label> <legend> <li> <link> <map> <mark> <menu> <menuitem> <meta> <meter> <nav> <object> <ol> <optgroup> <option> <output> <p> <param> <pre> <progress> <q> <s> <samp> <script> <section> <select> <small> <source> <span> <strong> <style> <sub> <summary> <sup> <table> <tbody> <td> <tfoot> <th> <thead> <tr> <textarea> <time> <title> <track> <u> <ul> <var> <video>

Other References

CSSStyleDeclaration JS Conversion

KeyboardEvent charCode Property

❮ DOM Events ❮ KeyboardEvent


Get the Unicode value of the pressed keyboard key:

var x = event.charCode;
Try it Yourself »

More "Try it Yourself" examples below.

Definition and Usage

The charCode property returns the Unicode character code of the key that triggered the onkeypress event.

The Unicode character code is the number of a character (e.g. the number "97" represents the letter "a").

Tip: For a list of all Unicode characters, please study our Complete Unicode Reference.

Tip: If you want to convert the Unicode value into a character, use the fromCharCode() method.

Note: If this property is used on onkeydown or onkeyup events, the returned value is always "0".

Note: This property is read-only.

Note: The charCode property is not supported in IE8 and earlier. However, for these browser versions, you can use the keyCode property. Or, for a cross-browser solution, you could use the following code:

var x = event.charCode || event.keyCode; // Use either charCode or keyCode, depending on browser support

Tip: You can also use the keyCode property to detect special keys (e.g. "caps lock" or arrow keys). However, both the keyCode and charCode property is provided for compatibility only. The latest version of the DOM Events Specification recommend using the key property instead (if available).

Tip: If you want to find out whether the "ALT", "CTRL", "META" or "SHIFT" key was pressed when a key event occured, use the altKey, ctrlKey, metaKey or shiftKey property.

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

charCode Yes 9.0 Yes Yes Yes



Technical Details

Return Value: A Number, representing the Unicode character code
DOM Version: DOM Level 2 Events

More Examples


A cross-browser solution to get the Unicode value of the pressed keyboard key:

// Use charCode if the browser supports it, otherwise use keyCode (for IE8 and earlier)
var x = event.charCode || event.keyCode;
Try it Yourself »


Alert some text if the user presses the "O" key:

function myFunction(event) {
  var x = event.charCode || event.keyCode;
  if (x == 111 || x == 79) { // o is 111, O is 79
    alert("You pressed the 'O' key!");
Try it Yourself »


Convert the Unicode value into a character:

var x = event.charCode || evt.keyCode;   // Get the Unicode value
var y = String.fromCharCode(x);          // Convert the value into a character
Try it Yourself »

Related Pages

HTML DOM reference: KeyboardEvent key Property

HTML DOM reference: KeyboardEvent keyCode Property

HTML DOM reference: KeyboardEvent which Property

❮ DOM Events ❮ KeyboardEvent