designmode-on

designmode-on.user.js

// ==UserScript==
// @name        designmode-on
// @namespace   http://127.0.0.1
// @description User Script for designmode-on
// @author      Heesang Chae
// @include     *
// @require     https://cdn.jsdelivr.net/gh/theand/userscript-util@latest/exec.js
// @version     2018.01.09
// @grant       none
// ==/UserScript==

/*global  userscript_util*/

/* ref:
 * https://twitter.com/IMAC2/status/1135875294156480512
 * https://developer.mozilla.org/en-US/docs/Web/API/Document/designMode
 */
const userscript = function (GM_info) {

    console.group(GM_info.script.name);

    userscript_util.exec.logGmInfo(GM_info);

    try {
        document.designMode = "on";
    } catch (err) {
        userscript_util.exec.logGmError(GM_info, err);
    }

    console.groupEnd();

};

if(top.document.location === self.document.location) {
    userscript_util.exec.executeLater(userscript, GM_info, 1500);
}