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YouTube likes/dislikes ratio may hold very little value on highly rated channel since ie. 94% and 96% can be a difference between bad and good video for that channel. This extension computes a logit out of likes ratio thus unbounding and centering it, so it can be more easily human interpretable.
// ==UserScript==
// @name Youtube Enhanced Score
// @description YouTube likes/dislikes ratio may hold very little value on highly rated channel since ie. 94% and 96% can be a difference between bad and good video for that channel. This extension computes a logit out of likes ratio thus unbounding and centering it, so it can be more easily human interpretable.
// @namespace jonnyrobbie
// @include /https?:\/\/(www\.)?(youtu\.be\/|youtube\.com\/(watch\?(.*&)?v=|(embed|v)\/))([^\?&"'>]+)/
// @version 1.0.1
// @grant none
// ==/UserScript==
function main() {
likes = getLikes();
score = calcScore(likes);
setScore(score);
}
function getLikes() {
var score = {
'likes': parseInt(document.getElementsByClassName("like-button-renderer-like-button")[0].getElementsByClassName("yt-uix-button-content")[0].innerHTML.replace(/,/g, ""), 10),
'dislikes': parseInt(document.getElementsByClassName("like-button-renderer-dislike-button")[0].getElementsByClassName("yt-uix-button-content")[0].innerHTML.replace(/,/g, ""), 10)
}
return score;
}
function calcScore(likes) {
var score = 0;
if (likes.likes == 0 || likes.dislikes == 0) {
score = "N/A";
} else {
var ratio = likes.likes / (likes.likes + likes.dislikes);
score = Math.log(ratio) - Math.log(1-ratio); //logit
score = score.toFixed(2);
}
return score;
}
function setScore(score) {
var elScore = document.getElementsByClassName("watch-view-count")[0];
elScore.innerHTML = elScore.innerHTML + " (" + score + ")";
}
main();