Author: Yujin Wang

browser viewport PS: innerHeight & innerWidth include scrollbars, clientHeight and clientWidth do not. https://stackoverflow.com/questions/1248081/how-to-get-the-browser-viewport-dimensions An element element.offsetWidth & element.offsetHeight (include the border) element.clientWidth & element.clientHeight (exclude the border) Get margin or border of an element: Element position relative to browser viewport img src: https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect

Add as the last child node of the parent element https://developer.mozilla.org/en-US/docs/Web/API/Node/appendChild Add as the first child node of the parent element https://developer.mozilla.org/en-US/docs/Web/API/Element/prepend Insert at the specified position Position: ‘beforebegin’: Before the element itself. ‘afterbegin’: Just inside the element, before its first child. ‘beforeend’: Just inside the element, after its last child. ‘afterend’: After the element itself. <!– beforebegin –> <p> <!– […]