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<!DOCTYPE html> <html> <body> <p> 搜索字符<br> "LO" <br>在短语中单词的<strong>结尾</strong>：<br> "HELLO, LOOK AT YOU!" </p> <p>找到位置：<span id="demo"></span></p> <script> var str = "HELLO, LOOK AT YOU!"; var patt1 = /LO\b/; var result = str.search(patt1); document.getElementById("demo").innerHTML = result; </script> </body> </html>