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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>在字符串开头搜索 "Is"：</p>
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<p id="demo"></p>
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<script>
let text = "Is this his";
let pattern = /^Is/g;
let result = text.match(pattern);
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document.getElementById("demo").innerHTML = result;
</script>
​
</body>
</html>
​