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JavaScript lastIndex 属性
tryjsref_regexp_lastindex
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<!DOCTYPE html> <html> <body> <script> var str = "The rain in Spain stays mainly in the plain"; var patt1 = /ain/g; while (patt1.test(str)==true) { document.write("'ain' found. Index now at: "+patt1.lastIndex); document.write("<br>"); } </script> </body> </html>