JavaScript: Return true if the parent element contains the child element, false otherwise
JavaScript fundamental (ES6 Syntax): Exercise-240 with Solution
Check Parent Contains Child
Write a JavaScript program that returns true if the parent element contains the child element, false otherwise.
Note: Check that parent is not the same element as child, use parent.contains(child) to check if the parent element contains the child element.
- Check that parent is not the same element as child.
- Use Node.contains() to check if the parent element contains the child element.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
// Define a function 'elementContains' to check if a parent element contains a child element
const elementContains = (parent, child) =>
// Check if the parent element is not the same as the child element and if the parent contains the child
parent !== child && parent.contains(child);
// Test the 'elementContains' function with different parent-child element combinations
console.log(elementContains(document.querySelector('head'), document.querySelector('title'))); // Output: true
console.log(elementContains(document.querySelector('body'), document.querySelector('body'))); // Output: false
Output:
true false
Flowchart:

Live Demo:
See the Pen javascript-fundamental-exercise-240 by w3resource (@w3resource) on CodePen.
For more Practice: Solve these Related Problems:
- Write a JavaScript program that returns true if a specified DOM element is contained within another element.
- Write a JavaScript function that uses Node.contains() to check for parent-child relationships in the DOM.
- Write a JavaScript program that traverses up the DOM tree to determine if an element is a descendant of a given parent.
- Write a JavaScript function that tests two DOM nodes and returns whether the first contains the second.
Go to:
PREV : Escape String for Regex.
NEXT : Remove Elements Until Condition.
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