The <style> element inside <head> can use \n as a separator between CSS rules (yes, they should be in a comment, but it's still possible to write them as regular text inside the element). When I want to get the content of the HTML document the \n are converted into <br> tags, which can lead to broken CSS rules when this HTML is loaded back. This conversion happens when setting style.innerText value. Steps: a) open the MiniBrowser and there the Inspector b) run in the Inspector Console: document.documentElement.innerHTML = "<head><style> body {color:orange;}\nbody {background:blue;}</style></head><body>text</body>" * you see a blue document with orange 'text' at the top, as expected. * the 'Elements' tab shows the <style> element content as one long line, as expected. c) run in the Inspector Console: document.head.firstElementChild.innerText = "body {color:green;}\nbody {background:red;}" * you see a red document with green 'text' at the top, as expected. * the 'Elements' tab shows the <style> element content with <br> element, where \n was used, which is wrong. d) run in the Inspector Console: document.documentElement.innerHTML = document.documentElement.innerHTML * you see a white document with green 'text' at the top, which is wrong. * the 'Elements' tab shows the <style> element content with <br> as a regular text, not as an element, which is wrong. The expected is that: * after c) the <style>'s content will not contain <br> element * after d) there will be absolutely no change in the view, neither in the HTML content/structure This is with the trunk at r259630.
It seems I can workaround this by using style.innerHTML instead of style.innerText, but I'm afraid it would have some side effects when the content has >, <, & or some such characters.
Created attachment 396630 [details] proposed patch This helps, though I'm not sure whether it's the way you'd like to have it.
This is how innerText and innerHTML are supposed to behave. Firefox does the exact same thing. See https://html.spec.whatwg.org/#the-innertext-idl-attribute.