Enter key press event in JavaScript

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I have a form with two text boxes, one select drop down and one radio button. When the enter key is pressed, I want to call a Javascript function (User defined), but when I press it, the form is submitted.

How do I prevent the form from being submitted when the enter key is pressed?

if(characterCode == 13)
{
    return false; // returning false will prevent the event from bubbling up.
}
else
{
    return true;
}

Ok, so imagine you have the following textbox in a form:

<input id="scriptBox" type="text" onkeypress="return runScript(event)" />

In order to run some "user defined" script from this text box when the enter key is pressed, and not have it submit the form, here is some sample code. Please note that this function doesn't do any error checking and most likely will only work in IE. To do this right you need a more robust solution, but you will get the general idea.

function runScript(e) {
    //See notes about 'which' and 'key'
    if (e.keyCode == 13) {
        var tb = document.getElementById("scriptBox");
        eval(tb.value);
        return false;
    }
}

returning the value of the function will alert the event handler not to bubble the event any further, and will prevent the keypress event from being handled further.

NOTE:

It's been pointed out that keyCode is now deprecated. The next best alternative which has also been deprecated.

Unfortunately the favored standard key, which is widely supported by modern browsers, has some dodgy behavior in IE and Edge. Anything older than IE11 would still need a polyfill.

Furthermore, while the deprecated warning is quite ominous about keyCode and which, removing those would represent a massive breaking change to untold numbers of legacy websites. For that reason, it is unlikely they are going anywhere anytime soon.

Enter key press event in JavaScript, keydown(): This event occurs when a keyboard key is pressed. The method either triggers the keydown event, or to run a function when a keydown event occurs. Enter key press event in JavaScript. I have a form with two text boxes, one select drop down and one radio button. When the enter key is pressed, I want to call a Javascript function (User defined), but when I press it, the form is submitted.

Use both event.which and event.keyCode:

function (event) {
    if (event.which == 13 || event.keyCode == 13) {
        //code to execute here
        return false;
    }
    return true;
};

JavaScript, If ascii code of key pressed is 13 then "ENTER" key was pressed; otherwise some can bind keypress or keydown event to that element or document object itself. script type = "text/javascript" src = "http://code.jquery.com/jquery-1.10.2.min.js"  The keypress event is fired when a key that produces a character value is pressed down. Examples of keys that produce a character value are alphabetic, numeric, and punctuation keys. Examples of keys that don't produce a character value are modifier keys such as Alt, Shift, Ctrl, or Meta.

If you're using jQuery:

$('input[type=text]').on('keydown', function(e) {
    if (e.which == 13) {
        e.preventDefault();
    }
});

jQuery detect ENTER key press event, Plain JavaScript using the onload attribute of the body element. We can use the JQuery keypress function to handle the enter keypress. The onkeypress event occurs when the user presses a key (on the keyboard). Tip: The order of events related to the onkeypress event: Note: The onkeypress event is not fired for all keys (e.g. ALT, CTRL, SHIFT, ESC) in all browsers. To detect only whether the user has pressed a key, use the onkeydown event instead, because it works for all keys.

event.key === "Enter"

More recent and much cleaner: use event.key. No more arbitrary number codes!

const node = document.getElementsByClassName(".mySelect")[0];
node.addEventListener("keydown", function(event) {
    if (event.key === "Enter") {
        event.preventDefault();
        // Do more work
    }
});

Mozilla Docs

Supported Browsers

How to Detect Enter Keypress using JavaScript/JQuery , In a keypress event, the Unicode value of the key pressed is stored in either the Key, Code. backspace, 8. tab, 9. enter, 13. shift, 16. ctrl, 17. alt, 18 React to CSS, from Vue to D3, and beyond with Node.js and Full Stack. 1. jQuery detect ENTER key. Note that the “ENTER” key is represented by ascii code “13”. Check this ASCII charts. To check whether user pressed ENTER key on webpage or on any input element, you can bind keypress or keydown event to that element or document object itself.

Detect Enter key pressed on whole document:

$(document).keypress(function (e) {
    if (e.which == 13) {
        alert('enter key is pressed');
    }
});

http://jsfiddle.net/umerqureshi/dcjsa08n/3/

KeyboardEvent Value (keyCodes, metaKey, etc), In the example, you wire the keypress event. If the key press isn't Enter ( Enter key code is 13), you push the pressed key to a character array. In  This tutorial shows how to detect an enter keypress on a keyboard using either plain JavaScript or JQuery. Plain JavaScript using the onload attribute of the body element. We can use the JQuery keypress function to handle the enter keypress.

Back to Basics – Using Keyboard Events in JavaScript, head >. < script type = "text/javascript" >. document.getElementById("​txt_username").onkeypress = function(event){. if (event.keyCode == 13 || event.​which == 13){. How TO - Trigger Button Click on Enter Trigger a button click on keyboard "enter" with JavaScript. Trigger a Button Click on Enter Press the "Enter" key inside the input field to trigger the button:

How to call javascript function on enter keypress in textbox with , Description: Bind an event handler to the "keypress" JavaScript event, or trigger that event on an element. version added: 1.0.keypress( handler ). handler. Type:​  The keyCode property returns the Unicode character code of the key that triggered the onkeypress event, or the Unicode key code of the key that triggered the onkeydown or onkeyup event.

.keypress(), I have an input that triggers an action when enter key is pressed. I've tried programmatically simulating that event in my integration test but have  event.code and event.key The key property of the event object allows to get the character, while the code property of the event object allows to get the “physical key code”. For instance, the same key Z can be pressed with or without Shift. That gives us two different characters: lowercase z and uppercase Z.

Comments
  • What exactly do you mean by user defined? Like, the user types some script in a text box and you run it using Eval()???
  • Is this a situation where PreventDefualt can be used?
  • @Stuart.Sklinar - Doing an eval on input the user typed into the browser gives them no more control than if they opened up the command console in Chrome/FF/IE and typed in the script themselves. The only person they can hurt is themselves... unless of course you are not enforcing security on the server. That is another issue altogether.
  • @SteelBrain - Again, giving somebody a textbox they can type in and then eval the contents by hitting a button is no different than if they opened up the developer tools and did it. If this were something that was getting saved into the DB and could be opened by ANOTHER user, then it would be a big deal, but that's a problem that is completely independent of this little snippet.
  • keyCode is now deprecated
  • Why both event.which and event.keyCode?
  • Some browsers support which others support keyCode. It is good practice to include both.
  • Also use the keydown event instead of keyup or keypress
  • @Agiagnoc but what event should this be attached to ?
  • @manish, keypress gives you more information to play with than keydown/up. stackoverflow.com/a/9905293/322537