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Amazon商品ページにKeepaの価格履歴のリンクを追加
// ==UserScript==
// @name Add Keepa Links
// @namespace http://tampermonkey.net/
// @version 0.1.1
// @description Amazon商品ページにKeepaの価格履歴のリンクを追加
// @author himuro_majika
// @match https://www.amazon.co.jp/*dp/*
// @match https://www.amazon.co.jp/*gp/*
// @icon https://www.google.com/s2/favicons?domain=keepa.com
// @grant none
// ==/UserScript==
(function() {
'use strict';
init();
function init() {
insertButton();
}
function getProduct() {
const url = location.href;
const patternList = [
/dp\/([^/?]+)/,
/\/gp\/product\/([^/?]+)/
];
let product = null;
patternList.forEach(pattern => {
const match = url.match(pattern);
if (match) {
product = match[1];
return;
}
});
return product;
}
function getTargetElement() {
return document.getElementById("buybox");
}
function createKeepaLinkButton() {
const button = document.createElement("div");
const a = document.createElement("a");
const keepaUrl = "https://keepa.com/#!search/5-";
a.setAttribute("target", "_blank");
a.innerText = "📉Keepaで価格を確認する.";
a.addEventListener("click", (e) => {
e.target.setAttribute("href", keepaUrl + getProduct());
})
button.appendChild(a);
return button;
}
function insertButton() {
const tEle = getTargetElement();
tEle.parentNode.parentNode.appendChild(createKeepaLinkButton());
}
})();