Remove non-chat log lines from e.g. http://logs.libuv.org/tc39/latest

__tc39-logs-trim.js

// Remove non-chat log lines from e.g. http://logs.libuv.org/tc39/latest
// paste in debugger console and run, or see _bookmarklet.md for a URL you can add to your favorites bar for the same.
(function () {
    function remove(name) {
        let elems = document.getElementsByClassName(name);
        do {
            let e = elems[0];
            if (!e) break;
            let parent = elems[0].parentNode;
            parent.removeChild(e);
            elems = document.getElementsByClassName(name);
        } while (elems && elems.length > 0);
    }
    remove("join");
    remove("quit");
    remove("part");
    // remove("nick");
})()

_bookmarklet.md

(I can't seem to use markdown to make an easy-to-drag-and-drop URL.)

Copy the following to a bookmark and simply click it to run the code on the page.

javascript:!function()%7Bfunction%20e(e)%7Bvar%20t=document.getElementsByClassName(e);do%7Bvar%20n=t%5B0%5D;if(!n)break;t%5B0%5D.parentNode.removeChild(n),t=document.getElementsByClassName(e)%7Dwhile(t&&t.length%3E0)%7De(%22join%22),e(%22quit%22),e(%22part%22)%7D();

url-gen-bookmarklet.js

let uglify = require('uglify-js');
let code = uglify.minify(`
(function () {
    function remove(name) {
        var elems = document.getElementsByClassName(name);
        do {
            var e = elems[0];
            if (!e) break;
            var parent = elems[0].parentNode;
            parent.removeChild(e);
            elems = document.getElementsByClassName(name);
        } while (elems && elems.length > 0);
    }
    remove("join");
    remove("quit");
    remove("part");
    // remove("nick");
})()
`).code;
let result = encodeURI('javascript:' + code);
console.log(result);