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<!DOCTYPE html> <html> <body> <h1>JavaScript 正则表达式</h1> <p>在字符串中全局搜索 "Hello" 和 "W3School"：</p> <p id="demo"></p> <script> let text = "Hello world!"; // look for "Hello" let pattern1 = /Hello/g; let result1 = pattern1.test(text) // look for "W3School" let pattern2 = /W3School/g; let result2 = pattern2.test(text); document.getElementById("demo").innerHTML = result1 + "<br>" + result2; </script> </body> </html>