String search()

search() accepts a regular expression as the argument.

search() method returns the index of the first pattern occurrence in the string. search() returns -1 if not found.

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <script type="text/javascript">
    
        var text = "loom, room, doom"; 
        
        var pos = text.search(/asdf/); 
        document.writeln(pos); //-1 
       
    </script>
</head>
<body>
</body>
</html>

Click to view the demo