@blackglory/wait-for/lib/wait-for-elements-matching-selector-attached.js

A module for waiting for things to happen.

import { observeAdditionOfDescendantNodes } from '@blackglory/observe';
import { toArray } from 'iterable-operator';
export function waitForElementsMatchingSelectorAttached(selector) {
    return new Promise(resolve => {
        const elements = document.querySelectorAll(selector);
        if (elements.length)
            return resolve(toArray(elements));
        const observer = observeAdditionOfDescendantNodes(document).subscribe(() => {
            const elements = document.querySelectorAll(selector);
            if (elements.length) {
                observer.unsubscribe();
                resolve(toArray(elements));
            }
        });
    });
}
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