Greasemonky script to post an arXiv entry to your Scrapbox.io

post.arXiv.org.to.scrapbox.user.js

// ==UserScript==
// @name        post new paper to Scrapbox
// @description post arXiv.or.js to your Scrapbox.io
// @namespace   http://xr0038.net
// @include     https://arxiv.org/abs/*
// @run-at      document-end
// @version     1
// ==/UserScript==

(function(Scrapbox){
  function pop_meta(key, name) {
		const metas = document.getElementsByTagName('meta');
    for (const x of metas) {
      if (x.getAttribute(key) == name)
        return x.getAttribute('content');
    }
  }
  function count_meta(key, name) {
		const metas = document.getElementsByTagName('meta');
		let count = 0;
    for (const x of metas)
      count += (x.getAttribute(key) == name);
	  return count;
  }
  function get_title() { return pop_meta('name','citation_title'); }
  function get_author() { 
    const first_author = pop_meta('name', 'citation_author');
    const num_author = count_meta('name', 'citation_author');
    if (num_author>1)
      return first_author.replace(/,.*/, ', et al.');
    return first_author;
  }
  
  const title = get_title();
  const author = get_author();
  const url = document.location;
  const post_url = `${Scrapbox}${title}?body=${author} ${url}`;
  
  const bookmarks = document.getElementsByClassName('bookmarks')[0];
	let logo = document.createElement('img');
  logo.setAttribute('src', 'https://nota.github.io/press-kit/S-icon.svg');
  logo.setAttribute('height', '16pix');
  logo.setAttribute('alt', 'Scrapbox');
  let scrapbox = document.createElement('a');
  scrapbox.appendChild(logo);
  scrapbox.setAttribute('class','abs-button abs-button-grey abs-button-small');
  scrapbox.setAttribute('href', encodeURI(post_url));
  scrapbox.setAttribute('target', '_blank');
  scrapbox.setAttribute('title','Post on Scrapbox');
  bookmarks.appendChild(scrapbox);
})("https://scrapbox.io/NAME_OF_YOUR_SPACE/");