Javascript - How to insert html element just before body closing tag as last loading

KelsonBatista
July 20, 2023
140 views
0 votes
2 Answers

I got a page that loads several add-ons and I need to insert html element (script) just before body closing tag (</ body>) as last loading. I tried some javascript methods such as appendChild and insertAdjacentElement, but none seem to work because of loading other scripts.

What I have done so far and didn’t work:

Using appendChild or insertAdjacentElement got same result:

var myscript = document.createElement('script');
myscript.setAttribute('src','https://xxxxx/myscript.min.js');
myscript.async = true;
document.body.appendChild(myscript);  or  document.body.insertAdjacentElement('beforeend', myscript);

Result:

<body>
   <element1>
   <element2>
   *<myscript> <--- inserted here*
   <element3>
   <element4>
   <element5>
   <element6>
   <element7>
</body>

Expected result:

<body>
   <element1>
   <element2>
   <element3>
   <element4>
   <element5>
   <element6>
   <element7>
   *<myscript> <--- insert here*
</body>

Tags: javascript

Answers

- P4dL4d
- July 20, 2023 at 5:05 am
- 0 votes
0
It looks like the javascript code might be executed before the html document is fully loaded. To avoid this place your javascript code inside a DOMContentLoaded to make sure the code runs after the DOM is fully loaded:
```
document.addEventListener('DOMContentLoaded', function() {
   var myscript = document.createElement('myscript');
   myscript.setAttribute('src','https://xxxxx/myscript.min.js');
   myscript.async = true;
   document.body.appendChild(myscript);
});
```
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