All files / src/renderer/dom removeLeftSiblings.ts

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import { beginMarker, endMarker } from "../createTemplate";
 
export default function removeLeftSiblings(markerNode: Node) {
 
    const {
        parentNode
    } = markerNode;
 
    let sibling = markerNode.previousSibling;
 
    // Keep the count of end markers to know how many beign markers to remove, which should correspond to the number of end markers found
    let endMarkersCount: number = 1; // The marker node should be the first end marker found
 
    while (sibling !== null) {
 
        if ((sibling as Comment).data === endMarker) {
 
            ++endMarkersCount;
        }
 
        if ((sibling as Comment).data === beginMarker &&
            --endMarkersCount === 0) { // Decrements the end marker 
 
            break; // Got the desired begin marker ... done
        }
 
        parentNode.removeChild(sibling);
 
        sibling = markerNode.previousSibling;
    }
}