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<!DOCTYPE html> <html> <body> <h2>JavaScript 字符串搜索</h2> <p>对 "ain" 执行不区分大小写的全局搜索：</p> <p id="demo"></p> <script> let text = "The rain in SPAIN stays mainly in the plain"; document.getElementById("demo").innerHTML = text.match(/ain/gi); </script> </body> </html>