Question

141

How to include an escaped< script> < /script> tag in a JavaScript variable?

rated 0 times [ 143] [ 2] / answers: 1 / hits: 15125 / 9 Years ago, sat, february 21, 2015, 12:00:00

I have a string in Javascript where I have to escape several characters:

<script>

function GenerateCode() {

     alert(ctry);

     var script = <script async src=//somesite.com/feed/livetrend.js></script>;

}

</script>

I have tried the following to escape the characters:

var script = <script async src=//somesite.com/feed/livetrend.js></script>;

However, this does not work correctly, despite having taken care of including an escape character in front of

It an error -unterminated string constant.

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

kevonmoisesf

Add To Favorites

Follow

Total Points: 693

Total Questions: 101

Total Answers: 128

Location: Reunion

Member since Mon, Dec 28, 2020

3 Years ago

answered 9 Years ago sonja · Accepted Answer

The issue is that when the browser encounters the closing </script> tag inside a open <script> tag, regardless of the context in which it is used, it will terminate the script tag there. There are a couple of way to avoid this.

Option 1 - Escape the `/` in the closing `script` tag:

var script = '<script async src="//somesite.com/feed/livetrend.js"></script>';

Option 2 - Wrap the JavaScript in commented out HTML comments:

<script>

/*<!--*/

var script = '<script async src="//somesite.com/feed/livetrend.js"></script>';

/*-->*/

</script>

Using <![CDATA[ and ]]> instead of  also works.

One potential downside to this might be if you also want to have JavaScript strings that also contain these closing comments or CDATA, then it may not work.

Option 3 - Put the JavaScript into an external file: