Any idea why this doesn't work whatsoever on any browser?
If i try it in jsfiddle it works.
$('#input_area').keypress(function(e) {
if(e.which == 13) {
alert('You pressed enter!');
}
});
HTML
<script type="text/javascript" src="counts.js"></script>
<script type="text/javascrip开发者_Python百科t" src="jquery-1.6.2.min.js"></script>
</head>
<body>
<input type="text" id="input_area"/>
</body>
JS
$(document).ready(function() {
$('#input_area').keypress(function(e) {
if(e.which == 13) {
alert('You pressed enter!');
}
});
});
I am ready to bet 5 bucks that you didn't wrap it in a document.ready handler in your actual application which jsfiddle does by default:
$(function() {
$('#input_area').keypress(function(e) {
if(e.which == 13) {
alert('You pressed enter!');
}
});
});
Another possibility is you forgot to reference jQuery or you referenced it from a wrong url.
Depending on the browser, the which property might not be implemented. You should also check for keyCode:
$(document).ready(function() {
$("#input_area").keypress(function (e) {
if ((e.which && e.which == 13) || (e.keyCode && e.keyCode == 13)) {
alert('You pressed enter!');
}
});
});
If it works when running in jsfiddle, then it works. I suspect you're trying to register the keypress listener when the dom is not loaded yet, and input_area is not available yet. Wrap it inside $(document).ready :
$(document).ready(function() {
$('#input_area').keypress(function(e) {
if (e.which == 13) {
alert('You pressed enter!');
}
});
});
Try to use binding,
$('#input_area').bind('keypress', function(e){
alert(e.which);
});
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
加载中,请稍侯......
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