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JavaScript JavaScript and the DOM Getting a Handle on the DOM Use CSS Queries to Select Page Elements

karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points
Posted by karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points

Iterating over HTML Collection

As Guil, said we cannot Iterate Over HTMLCollection exactly Just like an array.

But we were able to Iterate over highlight Variable holding the reference to .highlight classes with (for...of) loop, How was that possible then?

const highlights = document.getElementsByClassName('.highlight');

for (const highlight of highlights){
  highlight.style.backgroundColor = 'cornsilk';
}

2 Answers

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

An HTMLCollection doesn't have the same methods as an array, but it is still an iterable and can be used as the source for a loop variable.

So, while MyHTMLCollection.forEach(...); won't work, for (element of MyHTMLCollection) ... is OK.