问题
Can a <script> tag between <!DOCTYPE html> and <html> be valid?
The reason I ask is I found the code I've described above. Can it be valid under any circumstances?
回答1:
No. <html> is the root (or document) element of an HTML document; it must be the only root-level element in an HTML document (it cannot have any siblings). Further, HTML can only contain <head> and <body> (specifically one of each), meaning that any other tags (e.g. <script> must be descendants of <head> or <body>.
回答2:
I don't think so. If you want check. Use this validator: http://validator.w3.org/#validate_by_input+with_options
来源：https://stackoverflow.com/questions/22794684/script-tag-position-before-html-tag