To share common parts of all pages, implement an implementation that can skip this. Examples of common parts are global menus and advertisement areas. It is difficult for screen reader users and users who are growing in font size extremely to read such common parts in many ways and to pass by scrolling.
Please note that Accessibility Supported. Bypass blocks by "structured by heading" is not accessibility supporteded because it is often not available in visual browsers. So, we should consider the response to put the link for bypass blocks to be essential to satisfy 2.4.1 at present.
Frame and iframe elements can be collectively targeted for bypass blocks. By properly providing information on what kind of frame / iframe, with the title attribute, it will help you decide bypass blocks.
Links for bypass blocks are useful not only for global menus and advertising areas, but also for Facebook plugin-box which continues to read many links, for example.
|Principle||Operable||User interface components and navigation must be operable.|
|Guideline||Navigable||Provide ways to help users navigate, find content, and determine where they are.|
|A mechanism to bypass blocks of content that is repeated on multiple web pages can be used.|