JavaScript substring() 方法-在线运行代码案例-大卫编程网

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<!DOCTYPE html>
<html>
<title>JavaScript substring() 方法 - 基础教程(div.cn)</title>
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<body>
<h1>JavaScript substring() 方法</h1>
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<p>点击按钮从位置4到9(10-1)提取部分字符串:</p>
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<button onclick="myFunc()">Click</button>
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<p id="x"></p>
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<script>
function myFunc() {
   var str1 = 'Air Pollution is introduction of chemicals to the atmosphere.';
   var str2 = str1.substring(4, 10);
   document.getElementById('x').innerHTML = str2;
}
</script>
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</body>
</html>