Backslash(\) is very important in breaking a string in javascript. Without backslash when a string is breached, it can't be read by javascript there by no output is produced
In the following example since a backslash is not used while breaking a string, no output is displayed.
Example
<html>
<body>
<p id="backslash"></p>
<script>
document.getElementById("backslash").innerHTML = "Javascript is // string breached here
not java!";
</script>
</body>
</html>In case if the backslash is used then javascript tries to read the entire string and display it in the output as shown below.
Example
<html>
<body>
<p id="backslash"></p>
<script>
document.getElementById("backslash").innerHTML = "Javascript is \
not java!";
</script>
</body>
</html>Output
Javascript is not java!