问题
I would like to detect whether the user has pressed Enter using jQuery.
How is this possible? Does it require a plugin?
EDIT: It looks like I need to use the keypress() method.
I wanted to know if anyone knows if there are browser issues with that command - like are there any browser compatibility issues I should know about?
回答1:
The whole point of jQuery is that you don't have to worry about browser differences. I am pretty sure you can safely go with enter being 13 in all browsers. So with that in mind, you can do this:
$(document).on('keypress',function(e) {
if(e.which == 13) {
alert('You pressed enter!');
}
});
回答2:
I wrote a small plugin to make it easier to bind the "on enter key pressed" a event:
$.fn.enterKey = function (fnc) {
return this.each(function () {
$(this).keypress(function (ev) {
var keycode = (ev.keyCode ? ev.keyCode : ev.which);
if (keycode == '13') {
fnc.call(this, ev);
}
})
})
}
Usage:
$("#input").enterKey(function () {
alert('Enter!');
})
回答3:
I couldn't get the code posted by @Paolo Bergantino to work but when I changed it to $(document) and e.which instead of e.keyCode then I found it to work faultlessly.
$(document).keypress(function(e) {
if(e.which == 13) {
alert('You pressed enter!');
}
});
Link to example on JS Bin
回答4:
I found this to be more cross-browser compatible:
$(document).keypress(function(event) {
var keycode = event.keyCode || event.which;
if(keycode == '13') {
alert('You pressed a "enter" key in somewhere');
}
});
回答5:
You can do this using the jquery 'keydown' event handle
$( "#start" ).on( "keydown", function(event) {
if(event.which == 13)
alert("Entered!");
});
回答6:
Use event.key and modern JS!
$(document).keypress(function(event) {
if (event.key === "Enter") {
// Do something
}
});
or without jQuery:
document.addEventListener("keypress", function onEvent(event) {
if (event.key === "Enter") {
// Do something better
}
});
Mozilla Docs
Supported Browsers
回答7:
I spent sometime coming up with this solution i hope it helps someone.
$(document).ready(function(){
$('#loginforms').keypress(function(e) {
if (e.which == 13) {
//e.preventDefault();
alert('login pressed');
}
});
$('#signupforms').keypress(function(e) {
if (e.which == 13) {
//e.preventDefault();
alert('register');
}
});
});
回答8:
There's a keypress() event method. The Enter key's ascii number is 13 and is not dependent on which browser is being used.
回答9:
A minor extension of Andrea's answer above makes the helper method more useful when you may also want to capture modified enter presses (i.e. ctrl-enter or shift-enter). For example, this variant allows binding like:
$('textarea').enterKey(function() {$(this).closest('form').submit(); }, 'ctrl')
to submit a form when the user presses ctrl-enter with focus on that form's textarea.
$.fn.enterKey = function (fnc, mod) {
return this.each(function () {
$(this).keypress(function (ev) {
var keycode = (ev.keyCode ? ev.keyCode : ev.which);
if ((keycode == '13' || keycode == '10') && (!mod || ev[mod + 'Key'])) {
fnc.call(this, ev);
}
})
})
}
(see also Ctrl+Enter jQuery in TEXTAREA)
回答10:
In some cases, you may need to suppress the ENTER key for a certain area of a page but not for other areas of a page, like the page below that contains a header <div> with a SEARCH field.
It took me a bit to figure out how to do this, and I am posting this simple yet complete example up here for the community.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Test Script</title>
<script src="/lib/js/jquery-1.7.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$('.container .content input').keypress(function (event) {
if (event.keyCode == 10 || event.keyCode == 13) {
alert('Form Submission needs to occur using the Submit button.');
event.preventDefault();
}
});
</script>
</head>
<body>
<div class="container">
<div class="header">
<div class="FileSearch">
<!-- Other HTML here -->
</div>
</div>
<div class="content">
<form id="testInput" action="#" method="post">
<input type="text" name="text1" />
<input type="text" name="text2" />
<input type="text" name="text3" />
<input type="submit" name="Submit" value="Submit" />
</form>
</div>
</div>
</body>
</html>
Link to JSFiddle Playground: The [Submit] button does not do anything, but pressing ENTER from one of the Text Box controls will not submit the form.
回答11:
Try this to detect the Enter key pressed.
$(document).on("keypress", function(e){
if(e.which == 13){
alert("You've pressed the enter key!");
}
});
See demo @ detect enter key press on keyboard
回答12:
as the keypress event isn't covered by any official specification, the actual behavior encountered when using it may differ across browsers, browser versions, and platforms.
$(document).keydown(function (event) {
if (event.keyCode === 13) {
// Cancel the default action, if needed
event.preventDefault();
//call function, trigger events and everything tou want to dd . ex : Trigger the button element with a click
$("#btn").click();
}
})
I hope it would be useful !
回答13:
The easy way to detect whether the user has pressed enter is to use key number the enter key number is =13 to check the value of key in your device
$("input").keypress(function (e) {
if (e.which == 32 || (65 <= e.which && e.which <= 65 + 25)
|| (97 <= e.which && e.which <= 97 + 25)) {
var c = String.fromCharCode(e.which);
$("p").append($("<span/>"))
.children(":last")
.append(document.createTextNode(c));
} else if (e.which == 8) {
// backspace in IE only be on keydown
$("p").children(":last").remove();
}
$("div").text(e.which);
});
by pressing the enter key you will get result as 13 . using the key value you can call a function or do whatever you wish
$(document).keypress(function(e) {
if(e.which == 13) {
console.log("User entered Enter key");
// the code you want to run
}
});
if you want to target a button once enter key is pressed you can use the code
$(document).bind('keypress', function(e){
if(e.which === 13) { // return
$('#butonname').trigger('click');
}
});
Hope it help
回答14:
I think the simplest method would be using vanilla javacript:
document.onkeyup = function(event) {
if (event.key === 13){
alert("enter was pressed");
}
}
回答15:
$(function(){
$('.modal-content').keypress(function(e){
debugger
var id = this.children[2].children[0].id;
if(e.which == 13) {
e.preventDefault();
$("#"+id).click();
}
})
});
回答16:
$(document).keyup(function(e) {
if(e.key === 'Enter') {
//Do the stuff
}
});
来源：https://stackoverflow.com/questions/979662/how-to-detect-pressing-enter-on-keyboard-using-jquery