Toggle Heading

Making headings collapsed It outlines an article by making headings of a web page collapsed. It is useful when you reading papers, articles or documents with good structure. Well, it doesn't work well on every site. Because there are so many different web structures. To make it compliant, you can do slight change on the source code .I have made this source public, you can access it here(https://github.com/FrankZhai367/toggle-heading) It adds an outline to a webpage article by making headings collapsible. This is convenient when reading news, documents, or papers. Of course, it only works on some well-structured webpages. If you want it to work with a site you want to read, you can make changes to the code here (https://github.com/FrankZhai367/toggle-heading).