web-development/StringFunction.html at main · Varshalachheta/web-development · GitHub

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<!DOCTYPE html>
<html lang="en">
    <head>
        <title>JavaScript String Functions</title>
        <style>

        </style>
    </head>
    <body>
        <script>
            var str = "this is string";
            console.log(str);
            var position = str.indexOf('is');
            console.log(position);
             position = str.lastIndexOf('is')
             console.log(position)
             var substr = str.slice(-1,5);
             console.log(substr)
             var substr = str.substring(-1,5);
             console.log(substr)
             var substr = str.substr(1,5);
             console.log(substr)
             var replaced = str.replace('string', 'varsha')
             console.log(replaced)
             console.log(str.toUpperCase())
             console.log(str.toLowerCase())
             var spaces = "    this contains     whitespaces";
             console.log(spaces);
             console.log(spaces.trim())
        </script>
    </body>

</html>