CODEWITHSUNDEEP
javascriptsystemjs
Aedaeum
Aedaeum

Reputation: 305

IE 11 Will not load systemjs

I am working with SystemJS and I have a pseudo-bootstrapper file that I use to check to make sure certain conditions are met before the loading of the main scripts to execute the page load. Here is a snippet of that code.

var obj = document.createElement('script');
obj.src = 'jspm_packages/system.js';
document.body.appendChild(obj);

This code does NOT execute the script, yet it does load it with a 200 code as evidenced by the network tab within the IE dev tools. There should be a global object "System" created, but it does not exist. Looking through the DOM, the object is properly created and appended to the body.

Does anyone know if this is strictly an issue with IE and SystemJS? I have no idea what's going on. I'm pulling my hair out, as per usual with the demon that is IE. I should note that every other browser works as expected, providing the "System" global variable.

EDIT Further testing has assured that this is not an issue with appendChild, as other scripts using the same method, execute on load just fine.

Upvotes: 0

Views: 542

Answers (2)

Aedaeum
Aedaeum

Reputation: 305

The answer is that IE versions < Edge do not support promises. I needed a polyfill for IE 11.

Upvotes: 0

user1567453
user1567453

Reputation: 2095

Reading this article tells us that your script may not run in IE11. The line in particular which is of interest is:

"Script elements with external resources should no longer execute during appendChild."

This appears to be what's happening.

EDIT: An alternate approach could be taken.

It would be a good idea to do condition checks on the server side before sending the response if you want to change page loading at the system.js level. If that is not possible then I'd suggest doing a redirect after the condition checks instead of appendChild.

Upvotes: 1

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