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<!DOCTYPE html> <html> <body> <p>单击该按钮可对从大写“A”到小写“e”的任何字符进行全局搜索。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var str = "I Scream For Ice Cream, is that OK?!"; var patt1 = /[A-e]/g; var result = str.match(patt1); document.getElementById("demo").innerHTML=result; } </script> </body> </html>