The example in this article describes how JS determines whether to long press a certain key. Share it with everyone for your reference, the details are as follows:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
var lastkeyCode = -1;
function TestKeyDown(event) {
if (event.keyCode == lastkeyCode) {
alert("重复按下了某个按键!");
//处理
}
lastkeyCode = event.keyCode;
}
</script>
</head>
<body>
<input type="text" value="Test" onkeydown="TestKeyDown(event);" />
</body>
</html>
Readers who are interested in more JavaScript-related content can check out the special topics on this site: "Summary of JavaScript search algorithm techniques", "Summary of JavaScript animation special effects and techniques", "Summary of JavaScript errors and debugging techniques", "Summary of JavaScript data structures and algorithm techniques", "Summary of JavaScript traversal algorithms and techniques" and "JavaScript Mathematics Summary of operation usage》
I hope this article will be helpful to everyone in JavaScript programming.
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