Userscript to discourage thoughtless posting on Less Wrong

lwdelay.user.js

// ==UserScript==
// @name           LW Comment Delay
// @namespace      http://www.github.com/bakkot
// @description    Discourages thoughtless posting on Less Wrong
// @match          http://lesswrong.com/lw/*
// @match          http://lesswrong.com/r/*/lw/*
// @version        1.1
// ==/UserScript==


/**************************************************
Tested only on recent versions of Firefox and Chrome.

Installation
------------

Save this file as something.user.js. Then:

Firefox users: Install Greasemonkey and open the saved file in Firefox.

Chrome users: Go to chrome://extensions and drag the saved file onto the main body of the window.



Feedback
--------

bakkot on github or LessWrong
**************************************************/


var MESSAGE = "In posting this, I am making a good-faith contribution to the collective search for truth.";
// To change the delay, change '4000' below to some other number of milliseconds.

var styleEle = document.createElement('style');
styleEle.type = 'text/css';
styleEle.innerHTML = ':disabled { opacity: 0.5; }';
document.head.appendChild(styleEle);


// OK, so, it's hard to make this accessible to the page, and addEventListener doesn't
// function properly in the context of cloneNode, which LW's JS uses. So... *shudder* this
// gets converted to a string and placed directly.  This was the most straightforward
// solution I could find, I swear.
checkChanged = function(checkEle) {
  var subButton = checkEle.parentNode.parentNode.querySelector('[type=\'submit\']');
  if(checkEle.checked) {
    subButton['data-timer'] = setTimeout(function(subButton){return function(){
      subButton.disabled = false;
    };}(subButton), 4000);
  }
  else {
    subButton.disabled = true;
    clearTimeout(subButton['data-timer']);
  }
};



var injectHTML = '<label><input type=\'checkbox\' onchange="' +
'checkChanged = ' + checkChanged.toString() +
';checkChanged(this)" />' + MESSAGE +'</label>';



// Top-level comments
if(realcommentButtons=document.querySelector('.realcomment .buttons')) {
  realcommentButtons.querySelector('[type=\'submit\']').disabled = true;
  realcommentButtons.innerHTML += injectHTML;
}

// Replies
document.getElementById('cancel_').parentNode.innerHTML += injectHTML;
document.getElementById('comment_submit_').disabled = true;