Install from raw

jump-to-game-of-kancolle.user.js

// ==UserScript==
// @name         Set scroll position to game of KanColle
// @namespace    https://gist.github.com/kPherox
// @version      1.1.1
// @description  Jump to game frame top of KanColle.
// @author       kPherox <[email protected]>
// @match        http://www.dmm.com/netgame/social/-/gadgets/=/app_id=854854*
// @run-at       document-end
// @grant        GM_addStyle
// @updateURL    https://gist.github.com/kphrx/fb4f21c1bbfa6bcbb484c74824866e65/raw/jump-to-game-of-kancolle.user.js
// @downloadURL  https://gist.github.com/kphrx/fb4f21c1bbfa6bcbb484c74824866e65/raw/jump-to-game-of-kancolle.user.js
// ==/UserScript==

GM_addStyle(`.none-deco {
  text-decoration: none !important;
  font-weight: bold !important;
  color: #fff !important;
}`);

history.scrollRestoration = 'manual';
window.addEventListener("load", function() {
  window.scrollTo({ top: 75 })

  const p = HTMLElement.prototype;
  p.classAdd = function(cls) {
    this.classList.add(cls);
    return this;
  };
  p.prependChild = function(elm) {
    this.insertBefore(elm, this.firstElementChild);
    return elm;
  };

  const jumpButton = document.createElement('li')
                       .classAdd('menu-item')
                       .appendChild(document.createElement('a')
                                      .classAdd('menu')
                                      .classAdd('none-deco'));

  jumpButton.href = "#jumpToGame"
  jumpButton.textContent = 'Jump To Game';
  jumpButton.addEventListener("click", (e) => {
    e.preventDefault();
    window.scrollTo({ top: 75 });;
  });

  document.querySelector('.dmm-ntgnavi > .inner.clearfix > .ntgnavi-right > .ntgnavi-item > .menu-list').prependChild(jumpButton.parentNode);;
});