HTML and CSS Reference
In-Depth Information
DOcument Object mODel
The getElementsByTagName()
method creates an o b ject collection based
on a specific tag nam e from the document.
The getElementB y Id() method
references a docum e nt object based
on the value of its id attribute .
The getElement s ByClassName()
method creates an object collection
based on a specific class value from
the document.
All of the obje c ts in the
puzzleButton s collection
belong to the puzzles class.
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