代碼中doctype 后面一大串以及 xmlns后面是什么意思
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="https://www.w3.org/1999/xhtml">
?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="https://www.w3.org/1999/xhtml">
?
2018-08-06
舉報(bào)
2018-08-06
DOCTYPE聲明,告訴瀏覽器這個(gè)頁(yè)面是用哪個(gè) HTML 版本進(jìn)行編寫的,這里是XHTML 1.0 Transitional
詳情看這個(gè)http://www.w3school.com.cn/tags/tag_doctype.asp