Function createOrUpdateScript

src/inject/dynamic-theme/index.ts:70–78

* Note: This function is used only with MV2.

(className: string, root: ParentNode = document.head || document)

 * Note: This function is used only with MV2.
 */
function createOrUpdateScript(className: string, root: ParentNode = document.head || document): HTMLScriptElement {
    let element: HTMLScriptElement | null = root.querySelector(`.${className}`);
    if (!element) {
        element = document.createElement('script');
        element.classList.add('darkreader');
        element.classList.add(className);
    }
    return element;
}

const nodePositionWatchers = new Map<string, ReturnType<typeof watchForNodePosition>>();