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Add Twitter HashTag to share button on AtCoder
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// ==UserScript==
// @name AtCoder HashTag Setter
// @namespace https://atcoder.jp/
// @version 1.0
// @description Add Twitter HashTag to share button on AtCoder
// @author G4NP0N
// @match https://atcoder.jp/contests/*
// @grant none
// ==/UserScript==
window.onload = function() {
var url = location.href.split("/");
if(url.length < 5)return;
var contestId = location.href.split("/")[4];
var problemId;
var txt = document.getElementsByClassName("a2a_kit")[0].getAttribute("data-a2a-title");
txt += " #AtCoder_";
if(url.length==7){
if(url[5]=="tasks"){
txt +=url[6];
}else if(url[5]=="submissions" && url[6]!="me"){
txt += document.querySelector("#main-container > div.row > div:nth-child(2) > div:nth-child(9) > table > tbody > tr:nth-child(2) > td > a").getAttribute("href").split("/")[4];
}else{
txt+=contestId;
}
}else{
txt += contestId;
}
document.getElementsByClassName("a2a_kit")[0].setAttribute("data-a2a-title",txt);
};