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<!DOCTYPE html> <html> <body> <h2>JavaScript 字符串方法</h2> <p>substr() 方法提取字符串的一部分 并在新字符串中返回提取的部分：</p> <p id="demo"></p> <script> var str = "Apple, Banana, Kiwi"; var res = str.substr(7); document.getElementById("demo").innerHTML = res; </script> </body> </html>