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<!DOCTYPE html> <html> <body> <h2>JavaScript Regular Expressions</h2> <p>The lastIndex property specifies the index at which to start the next match:</p> <p id="demo"></p> <script> let text = "The rain in Spain stays mainly in the plain"; let pattern = /ain/g; let result = ""; while (pattern.test(text)==true) { result += "Found at position " + pattern.lastIndex + "<br>"; } document.getElementById("demo").innerHTML = result; </script> </body> </html>
