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onkeydown Event

Event Object Reference Event Object

Example

Execute a JavaScript when a user is pressing a key or holding down a key:

<input type="text" onkeydown="return noNumbers(event)" />

Try it yourself »

Definition and Usage

The onkeydown event occurs when the user is pressing a key or holding down a key.

Tip: The order of events related to the onkeydown event:

  1. onkeydown
  2. onkeypress
  3. onkeyup

Syntax

In HTML:

<element onkeydown="SomeJavaScriptCode">

In JavaScript:

object.onkeydown="SomeJavaScriptCode"

Parameter Description
SomeJavaScriptCode Required. Specifies a JavaScript to be executed when the event occurs

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The onkeydown event is supported in all major browsers.

onkeydown is Supported by the Following HTML Tags:

<a>, <acronym>, <address>, <area>, <b>, <bdo>, <big>, <blockquote>, <body>, <button>, <caption>, <cite>, <code>, <dd>, <del>, <dfn>, <div>, <dt>, <em>, <fieldset>, <form>, <h1> to <h6>, <hr>, <i>, <input>, <kbd>, <label>, <legend>, <li>, <map>, <object>, <ol>, <p>, <pre>, <q>, <samp>, <select>, <small>, <span>, <strong>, <sub>, <sup>, <table>, <tbody>, <td>, <textarea>, <tfoot>, <th>, <thead>, <tr>, <tt>, <ul>, <var>

onkeydown is Supported by the Following JavaScript objects:

Document, Window

Event Object Reference Event Object
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