Html table 为什么我不能用doctype html验证top inside H1
它确实与顶部对齐。只是元素有一个默认的边距，它会把元素往下推。删除它： h1{ 保证金：0 } iasdfasdfa asdfasdfasdf asdfasdfasdf asdfasdf 此文本不会在顶部生效Html table 为什么我不能用doctype html验证top inside H1,html-table,Html Table,它确实与顶部对齐。只是元素有一个默认的边距，它会把元素往下推。删除它： h1{ 保证金：0 } iasdfasdfa asdfasdfasdf asdfasdfasdf asdfasdf 此文本不会在顶部生效 <!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"> <table border=1><tr><td>iasdfasdfa<br>asdfasdfas
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml">
<table border=1><tr><td>iasdfasdfa<br>asdfasdfasdf<br>asdfasdfasdf<br>asdfasdf</td><td valign=top style='vertical-align: top;'><h1>This Text Won't Valign Top</h1></td></tr></table>