Disable Slack WYSIWYG userscript

disable_slack_wysiwyg.user.js

// ==UserScript==
// @name         Disable Slack WYSIWYG
// @namespace    https://gist.github.com/spencerhakim
// @version      1.0
// @description  Disables the WYSIWYG editor in Slack
// @author       Spencer Hakim
// @match        https://app.slack.com/client/*
// @grant        unsafeWindow
// ==/UserScript==

window.addEventListener('load', function () {
    'use strict';

    const slackDebug = window.unsafeWindow.slackDebug;

    const BULK_ADD_EXPERIMENTS = slackDebug.redux.actions.experimentsStoreBulkAddExperiments.getType();
    const IGNORE_ME = Symbol('Ignore Disable Slack WYSIWYG');

    slackDebug.reduxWatcher.addWatcher((state, action) => {
        // Ignore other actions, or actions marked as ignorable
        if (action.type !== BULK_ADD_EXPERIMENTS || action[IGNORE_ME]) {
            return;
        }

        // Get the experiments, except for the WYSIWYG ones
        let {
            wysiwyg_composer,
            wysiwyg_composer_ios,
            wysiwyg_composer_webapp,
            ...newExperiments
        } = state.experiments;

        // If the WYSIWYG experiments are already disabled, do nothing
        if (!wysiwyg_composer && !wysiwyg_composer_ios && !wysiwyg_composer_webapp) {
            return;
        }

        console.warn("Disabling WYSIWYG...");
        slackDebug[slackDebug.activeTeamId].redux.dispatch({
            type: BULK_ADD_EXPERIMENTS,
            payload: newExperiments,
            error: false,
            [IGNORE_ME]: true
        });
    });

});