amazon_page_add_keepa.user.js

// ==UserScript==
// @name        amazon page add keepa
// @version      0.1
// @description  sakura checker frame to amazon page add.
// @updateURL   https://gist.github.com/53JIlLenWe11/9ed4287f1f10231abaa8633de5adc790/raw/amazon_page_add_keepa.user.js
// @downloadURL https://gist.github.com/53JIlLenWe11/9ed4287f1f10231abaa8633de5adc790/raw/amazon_page_add_keepa.user.js
// @author       53JIlLenWe11
// @include      /^https://(www\.|smile\.)amazon\.co\.jp/(.*/)?[d-g]p//
// @run-at document-end
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function getAmazonPath() {
        const matches = /((?:.*)amazon.(?:[.\w]+))\/(?:.*)?([a-z]p)\/(?:product\/)?([^\/\?&]+)(?:.*|$)/.exec(document.URL);
        if (matches === null) {
            return null;
        }
        return matches[3];
    }
    const div = document.createElement('div');
    div.style="min-width: 935px; max-width: 971px; display: flex; height: 417px; border: 0px none; margin: 10px 0px 0px;";
    div.id="keepaContainer";
    const frame = document.createElement('iframe');
    const amazon_path = getAmazonPath();
    frame.src=`https://keepa.com/iframe_addon.html#5-0-${amazon_path}`;
    frame.id='keepa';
    frame.scrolling='no';
    frame.style="width: 100%; height: 100%; border:0 none;overflow: hidden;";
    div.appendChild(frame);
    document.querySelector('#bottomRow').appendChild(div);
})();