learning/regex.html at master · riteshvish/learning · GitHub

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<!DOCTYPE html>
<html>
<body>

<p>Search a string for "w3Schools", and display the position of the match:</p>

<button onclick="findStrBetween('<productId:','>')">Try it</button>

<p id="demo"></p>

<script>
function findStrBetween(s1,s2) {

   try{
   	var str = "My cow a <productId:123456789> lways gives milk";
    //var n = str.match(/<productId:(.*)>/i); regex
    var regExp = /<productId:(.*)>/i;// regex var
    var pattern1=s1+'(.*)'+s2; // dynamic pattern
    var reg=new RegExp(pattern1, 'gi') // regex obj
	var matches = regExp.exec(str);
    var matches2= str.match(reg)[0];
    alert(matches2.replace(s1,'').replace(s2,''))
	document.getElementById("demo").innerHTML = matches2;
    }
    catch(e){
    	alert(e)
    }

}
</script>

</body>
</html>