HTML DOM Element contains()

Is "mySPAN" a descendant of "myDIV"?

const span = document.getElementById("mySPAN");
let answer = document.getElementById("myDIV").contains(span);

Description

The contains() method returns true if a node is a descendant of a node.

The contains() method returns false if not.

A descendant can be a child, grandchild, great-grandchild, ...

node.contains( node)

Parameter	Description
node	Required. The node that may be a descendant of the node.

Type	Description
Boolean	`true` - The node is a descendant `false` - The node is NOT a descendant

element.contains() is a DOM Level 1 (1998) feature.

It is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	9-11