Nested Javascript Templates … is this possible / valid?

by

You can’t nest script tags. The way script tags work, the browser reads the opening tag and then starts building up a string of the code therein without interpreting that code at all. It stops doing that the first time it sees the exact sequence < / s c r i p t >. The browser will always stop at the first of those it finds, and crucially it ignores any intervening opening tag sequence, like < s c r i p t >. This is because the browser doesn’t parse the script code, that’s not its job. It’s a separation of concerns thing. (script tags probably shouldn’t be tags at all, but rather something more like a CDATA structure. But they’re what we have.)

E.g., from the browser’s point of view:

<script id="Product" type="text/html">              SCRIPT STARTS HERE
    <div class="product">                           SCRIPT CODE CONTINUES
        ....                                        SCRIPT CODE CONTINUES
        <div class="features">                      SCRIPT CODE CONTINUES
            <script id="Features" type="text/html"> SCRIPT CODE CONTINUES (*NOT* START OF SCRIPT)
                <div class="feature">               SCRIPT CODE CONTINUES
                    ...                             SCRIPT CODE CONTINUES
                </div>                              SCRIPT CODE CONTINUES
            </script>                               SCRIPT ENDS
        </div>                                      ENDING `div` TAG (probably mis-matched)
        ...
    </div>
</script>                                           MIS-MATCHED ENDING `script` TAG

Now, if you’re using a server-side templating engine of some kind that will replace those script tags with markup and then send the updated markup to the browser, then it’s up to the templating engine whether it supports nesting. Browsers do not.

More Related Contents:

  1. Test for existence of nested JavaScript object key
  2. Group array of object nesting some of the keys with specific names
  3. Explanation of …
  4. How to dynamically change header based on AngularJS partial view?
  5. Nested routes with react router v4 / v5
  6. Javascript “this” pointer within nested function
  7. Accessing nested JavaScript objects and arrays by string path
  8. How to set object property (of object property of..) given its string name in JavaScript?
  9. Javascript: how to dynamically create nested objects using object names given by an array
  10. How do I accomplish an if/else in mustache.js?
  11. Access a variable outside the scope of a Handlebars.js each loop
  12. In Android Webview, am I able to modify a webpage’s DOM?
  13. Backbone.js : repopulate or recreate the view?
  14. How to use if statements in underscore.js templates?
  15. How to separate web components to individual files and load them?
  16. Generate (multilevel) flare.json data format from flat json
  17. Return value from nested function in Javascript [duplicate]
  18. Opening new window in HTML for target=”_blank”
  19. Can you write nested functions in JavaScript?
  20. Is there some innerHTML replacement in SVG/XML?
  21. What good template language is supported in JavaScript?
  22. Angular filter a object by its properties
  23. Dynamically refresh a part of the template when a variable is updated golang
  24. Accessing or creating nested JavaScript objects with string key without eval
  25. Are ES6 template literals faster than string concatenation?
  26. Is there a way to pass variables into templates in Meteor?
  27. How to display async data in vue template
  28. Running a command in a Grunt Task
  29. How to redirect on another page and pass parameter in url from table?
  30. How to get the total depth of an unknown JSON hierarchy?

Leave a Comment