30 lines
803 B
TypeScript
30 lines
803 B
TypeScript
/*
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* https://github.com/morethanwords/tweb
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* Copyright (C) 2019-2021 Eduard Kuzmenko
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* https://github.com/morethanwords/tweb/blob/master/LICENSE
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*/
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import whichChild from "./whichChild";
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export default function positionElementByIndex(element: HTMLElement, container: HTMLElement, pos: number, prevPos?: number) {
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if(prevPos === undefined) {
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prevPos = element.parentElement === container ? whichChild(element) : -1;
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}
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if(prevPos === pos) {
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return false;
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} else if(prevPos !== -1 && prevPos < pos) { // was higher
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pos += 1;
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}
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if(!pos) {
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container.prepend(element);
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} else if(container.childElementCount > pos) {
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container.insertBefore(element, container.children[pos]);
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} else {
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container.append(element);
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}
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return true;
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}
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