search text in mokeedev's changelogs

mokeedev-changelog-search.js

//example url: http://changelog.mokeedev.com/index.php?mk_version=MK60
//usage: query(String str)
//result will be shown in console
let query = str => Promise.all([...document.querySelectorAll("table > tbody > tr > td > a")].map(e=>fetchretry(e.href).then(res => res.text()).then(text=>text.match(str)&&!console.log(e.href/*,text*/)&&[e.href,text]))).then(e=>e.filter(e => e === 0 || e));

//https://gist.github.com/myfreeer/44f23611451119869804f8c28ee1a190
//rewrite from https://github.com/jonbern/fetch-retry
let fetchretry = (url, options) => {
    var retries = (options && options.retries) ? options.retries : 3;
    var retryDelay = (options && options.retryDelay) ? options.retryDelay : 500;
    return new Promise((resolve, reject) => {
        let wrappedFetch = n => fetch(url, options).then(response => resolve(response)).catch(error => n > 0 ? setTimeout(() => wrappedFetch(--n), retryDelay) : reject(error));
        wrappedFetch(retries);
    });
};