twitter_cramming.js

// ==UserScript==
// @name Twitter Cramming
// @description Force enable cramming (280 character tweets) on Twitter
// @author Prof. 9
// @version 0.2
// @match https://twitter.com/*
// @run-at document-idle
// @namespace prof9.twittercramming
// ==/UserScript==


(function() {
    'use strict';

    function enableCramming() {
        var initDataInput = document.getElementById('init-data');
        var initData = JSON.parse(initDataInput.value);
        initData.deciders.cramming_feature_enabled = true;
        initData.deciders.cramming_ui_enabled = true;
        initDataInput.value = JSON.stringify(initData);
        console.log('Enabled cramming');
    }



    var body = document.getElementsByTagName('body')[0];
    var bodyObserver = new MutationObserver(function(mutations) {
        enableCramming();
    });

    bodyObserver.observe(body, {childList: true});

    enableCramming();
})();

// This is free and unencumbered software released into the public domain.
// 
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.
// 
// In jurisdictions that recognize copyright laws, the author or authors
// of this software dedicate any and all copyright interest in the
// software to the public domain. We make this dedication for the benefit
// of the public at large and to the detriment of our heirs and
// successors. We intend this dedication to be an overt act of
// relinquishment in perpetuity of all present and future rights to this
// software under copyright law.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// OTHER DEALINGS IN THE SOFTWARE.
// 
// For more information, please refer to <http://unlicense.org>