x
<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>