<p>How do I get an element or element list by it's tag name. Take for example that I want all elements from <code>&lt;h1&gt;&lt;/h1&gt;</code>.
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document.getElementsByTagName('a') returns an array. Look here for more information:
http://web.archive.org/web/20120511135043/https://developer.mozilla.org/en/DOM/element.getElementsByTagName
Amendment: If you want a real array, you should use something like
```
Array.from(document.getElementsByTagName('a'))
```
, or these days you'd probably want
```
Array.from(document.querySelectorAll('a'))
```
. Maybe polyfill
```
Array.from()
```
if your browser does not support it yet. I can recommend
https://polyfill.io/v2/docs/
very much (not affiliated in any way)