JavaScript Is it possible to get the background color of an element that is being set via an external css file?

I was trying to get the background color of an element using javascript:

URL: https://mathemagiker.de/

Javascript: document.getElementById('angebot').style.backgroundColor

Result: Nothing

However this element has a background color but it is being applied from a css file.

Question: How can I get this color with javascript?

Answer:1

Use selectize.js with remote source

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How I can use selectize.js with remote source? I have followed this example: $('#select-repo').selectize({ valueField: 'url', labelField: 'name', searchField: 'name', create: false, ...

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I have a GET method that returns the following JSON on route localhost:3000/documents [{ "id": "5b48bffc644fca001419769c", "names": [{ "name": "bob" }, { "name": "stan" } ]...

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