massCode
DOM
Element Contains
This snippet checks whether the parent element contains the child.
js
const elementContains = (parent, child) =>
parent !== child && parent.contains(child)
Example
js
const head = document.querySelector('head')
const body = document.querySelector('body')
elementContains(head, body) // true
Has Class
This snippet checks whether an element has a particular class.
js
const hasClass = (el, className) => el.classList.contains(className)
Example
js
hasClass(document.querySelector('p'), 'some-class') // true