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Viewscan't access the 'header' element inside my html file using JS
I'm trying to create an HTML element using JavaScript document.createElement("div") and then prepend/append it in my header of the document, but below is what I'm getting.
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Juan Pablo Isaza
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You never defined header. You have to initialize it first by using var header = document.querySelector('header');
Then you can use header.prepend(...);
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Juan Pablo Isaza
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Try to replace your header.prepend to:
document.getElementsByTagName("header")[0].prepend(message);
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Juan Pablo Isaza
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