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setMutationHandler

MutationObserver wrapper to wait for the specified CSS selector

Tätä skriptiä ei tulisi asentaa suoraan. Se on kirjasto muita skriptejä varten sisällytettäväksi metadirektiivillä // @require https://greasyfork.org/scripts/12228-setmutationhandler/code/setMutationHandler.js?version=175122.

Tekijä
wOxxOm
Arvostelut
5 0 0
Versio
3.0.2
Luotu
Päivitetty
Lisenssi
N/A
Käytössä
Kaikki sivustot

Tekijän kuvaus

A MutationObserver wrapper to wait for an element (or elements) with the specified CSS selector.

First, load the function in your script metablock:

..............
// @require       https://greasyfork.org/scripts/12228/code/setMutationHandler.js
..............
// ==/UserScript==
  • Watch for added nodes:

    setMutationHandler(document, '.container p.some-child', nodes => {
        nodes.forEach(node => node.style.display = 'none');
        return false; // disconnect the observer, this is useful for one-time jobs
    });
    
  • The observation target parameter may be omitted so "document" will be used by default:

    setMutationHandler('.container p.some-selector', nodes => { ...... });
    
  • Options form:

    setMutationHandler({
        processExisting: true, // Process existing elements and watch for mutations from now on
        selector: '.container p.some-child',
        handler: nodes => nodes.forEach(node => node.style.display = 'none')
    });
    
  • Watch for added nodes only inside the specified container element that already exists in the document:

    setMutationHandler({
        target: document.querySelector('.container-selector'),
        selector: 'p.some-child',
        handler: nodes => nodes.forEach(node => node.style.display = 'none')
    });
    
  • Advanced example with customized mutation options:

    setMutationHandler({
        selector: '.container p.some-child',
        processExisting: false,       // optional
        target: document,             // optional
        childList: true,              // optional
        subtree: true,                // optional
        attributes: false,            // optional
        attributeFilter: [],          // optional
        attributeOldValue: false,     // optional
        characterData: false,         // optional
        characterDataOldValue: false, // optional
        handler: nodes => {
            console.log(nodes);
            return false; // disconnect the observer, this is useful for one-time jobs
        },
    });
    
  • Make your userscript run at document-start to catch the mutations during page load:

    ..............
    // @run-at        document-start
    // @require       https://greasyfork.org/scripts/12228/code/setMutationHandler.js
    ..............
    // ==/UserScript==