In myeclipse, Undefined attribute name (placeholder). and Undefined attribute name (autocomplete). Problems appear after writing jsp code
Baidu a bit, said that there is a problem with the header file
It turned out to be:
Change it to:
problem solved!
reason:
There are three <!DOCTYPE> declarations in HTML 4.01. In HTML5 there is only one:
<!DOCTYPE html>placeholder and autocomplete are new tags of htm5, so an error will be reported.