allset for violentmonkey

allset.user.js

// ==UserScript==
// @name        allset
// @namespace   Violentmonkey Scripts
// @exclude       *://*/*
// @grant       none
// @version     1.0
// @author      dongsoo
// @grant       GM_addStyle
// @grant       GM_info
// @grant       GM_setValue
// @grant       GM_getValue

GM_addStyle(`
  .style {
    width:30px;
    height:30px;
  }  
`);

// start * seconds later
const TIMEOUT = 2;
setTimeout(() => {
  
}, TIMEOUT * 1000);

const asyncQuerySelector = async (node, query) => {
  try {
    return await (query ? node.querySelector(query) : node);
  } catch (error) {
    console.error(`Cannot find ${query ? `${query} in`: ''} ${node}.`, error);
    return null;
  }
};
// asyncQuerySelector(document, '#sections ytd-guide-section-renderer #items').then('load it, ',console.log);


const waitForElement = (selector) => {
  return new Promise((resolve, reject) => {
    let element = document.querySelector(selector);

    if(element) {
      resolve(element);
      return;
    }

    let observer = new MutationObserver((mutations) => {
      mutations.forEach((mutation) => {
        let nodes = Array.from(mutation.addedNodes);
        for(let node of nodes) {
          if(node.matches && node.matches(selector)) {
            observer.disconnect();
            resolve(node);
            return;
          }
        };
      });
    });

    observer.observe(document.documentElement, { childList: true, subtree: true });
  });
}

// waitForElement('ul li a')
// .then(el => console.log('load : ', el))
// .then(()=>{
//   //working
// })
// .catch(()=>{console.log('fail')})

// https://gist.github.com/PaulKinlan/2d7cd4e78a63a97387137a0a9fb7ee6e