The function of the page inside CDATA _ Experience Exchange

The contents of the <script> and <style> elements must be wrapped into a CDATA section.

If you use special characters (such as < or &) or entity references (such as < or &) in a script or style sheet, you will need to mark the contents of the script or style sheet as a CDATA (character data) section, as shown below.

<script type= "Text/javascript" >
<! [cdata[

function Isless (A, b) {
if (a < b)
return true;
}

]]>
</script>

Using a CDATA section is not valid for all browsers. For example, Internet Explorer treats a CDATA section in <script> tags as a syntax error. You can avoid this problem by adding JavaScript annotations, as shown below.

<script type= "Text/javascript" >
/* <! [cdata[* *

function Isless (A, b) {
if (a < b)
return true;
}

*]]> * *
</script>

JavaScript uses/* and */to flag the start and end of annotations. Therefore, the CDATA section hides from JavaScript, but not the browser that analyzes the page. In summary, it's a good idea to put style rules and scripts in an external file and refer to them from the XHTML page. You can avoid all of these problems by using external style sheets and scripts.