Minimal website continued
Ensure pages can’t come from cache
added <body> element
Preload on hover, display on click
correct error in removeHash
remove a.setAttribute('instant')
Add CSS style for debug
Bugfix, put footers at the end
add some test links
Bugfix, document.title was set to body html in popstate
Add test links for parent
add checkLinkFunction
Refactor links’ event listeners
refactor checkLinkFunction
put debug classList.add in checkLinkFunction
remove ending '/' from `domain`
set valid `validStart`
add tests for ?search and #hash links
add test for other domain with same extension
refactor checkLinkFunction