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<!DOCTYPE html>
<html>
<body>
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<h2>JavaScript 字符串</h2>
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<p>startsWith() 方法。</p>
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<p id="demo"></p>
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<p>Internet Explorer 不支持 startsWith() 方法。</p>
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<script>
let text = "Hello world, welcome to the universe.";
document.getElementById("demo").innerHTML = text.startsWith("world", 6);
</script>
​
</body>
</html>
​