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<!DOCTYPE html> <html> <body> <h2>JavaScript RegExp</h2> <p>exec() 方法测试（检索）字符串中的匹配项：</p> <p>在字符串中搜索字符 "e"：</p> <p id="demo"></p> <script> let text = "The best things in life are free"; let result = /e/.exec(text); document.getElementById("demo").innerHTML = result; </script> </body> </html>