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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 正则表达式</h1>
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<p>source 属性返回 RegExp 模式的文本：</p>
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<p id="demo"></p>
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<script>
let text = "Visit W3School";
let pattern = /W3S/g;
let result = pattern.source;
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document.getElementById("demo").innerHTML = result;
</script>
​
</body>
</html>
​