collapse( )
Collapses the element and sets its collapsed property to true.
The collapse() function returns a Promise that is resolved when the
element's collapsed property has been set to true.
To learn about the behavior of a collapsed element,
see the collapsed property.
You can also collapse an element when the page loads by using the Properties and Events panel in the Editor.
Note: The collapse() function doesn't remove elements from the DOM.
To soft delete an element from the DOM, use the delete() function.
Method Declaration
Copy
Request
This method does not take any parameters
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