prevent-dialog.js

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import { registerScriptlet } from './base.js';
import { safeSelf } from './safe-self.js';

/**
 * @scriptlet prevent-dialog
 * 
 * @description
 * Programmatically close `dialog` elements.
 * 
 * @param [selector]
 * Optional. The dialog element must matches `dialog{selector}` for the
 * prevention to take place.
 * 
 * @usage:
 * example.com##+js(prevent-dialog)
 * 
 * */

export function preventDialog(
    selector = '',
) {
    const safe = safeSelf();
    const logPrefix = safe.makeLogPrefix('prevent-dialog', selector);
    const prevent = ( ) => {
        debouncer = undefined;
        const elems = document.querySelectorAll(`dialog${selector}`);
        for ( const elem of elems ) {
            if ( typeof elem.close !== 'function' ) { continue; }
            if ( elem.open === false ) { continue; }
            elem.close();
            safe.uboLog(logPrefix, 'Closed');
        }
    };
    let debouncer;
    const observer = new MutationObserver(( ) => {
        if ( debouncer !== undefined ) { return; }
        debouncer = requestAnimationFrame(prevent);
    });
    observer.observe(document, {
        attributes: true,
        childList: true,
        subtree: true,
    });
}
registerScriptlet(preventDialog, {
    name: 'prevent-dialog.js',
    dependencies: [
        safeSelf,
    ],
});