JavaScript · Junior · Question 70 of 75

What does `el.classList.toggle("open")` do?

✓Correct answer: Adds the class if missing, removes it if present, and returns whether it is now present
2Replaces all classes with open
3Toggles the element's visibility

Explanation

A second argument forces the state: toggle("open", isOpen). Using classList is safer than editing the className string by hand.

Further reading

javascript.info: Styles and classes ↗

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