If you want to insert a special character into a string in JavaScript , you can use he escape sequences to do it.

For example , if you want to insert the copyright symbol into a string in JavaScript , you can use the \u00A9 escape sequence as shown below.

How to Insert Special Character in to a string in JavaScript ?

<script>
    var input = "This page is \u00A9 Senthil Kumar";
    document.write(input);     
</script>

The backslash character defines the escape character in JavaScript and in the above code snippet (u00A9) we are using the unicode sequence which is a kind of pattern for a specific character where \u00A9 represents the copyright symbol.