在 HTML 中声明字符编码
Declaring character encodings in HTML
我应该这样声明字符集吗:
<meta http-equiv="content-type" content="text/html" charset="utf-8" />
或者像这样：
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
或者两者都有效？
这两个声明都是有效的，您总是可以使用简短的等效版本：
<meta charset="utf-8" />
希望对您有所帮助。
因为您以
开始文档
<!DOCTYPE html>
我怀疑是否有必要指定内容类型。而只是指定 encoding/charset:
<head>
<meta charset="UTF-8">
</head>
根据@Alohci 的评论更新。
见W3C's documentation on <meta http-equiv="...">:
encoding declaration state (http-equiv="content-type")
The encoding declaration state is just an alternative form of setting the charset attribute: it is a character encoding declaration. This state's user agent requirements are all handled by the parsing section of the specification.
For meta elements with an http-equiv attribute in the Encoding declaration state, the content attribute must have a value that is an ASCII case-insensitive match for a string that consists of: the literal string "text/html;", optionally followed by any number of space characters, followed by the literal string "charset=", followed by one of the labels of the character encoding of the character encoding declaration.
A document must not contain both a meta element with an http-equiv attribute in the encoding declaration state and a meta element with the charset attribute present. (emphasis mine)
因此，如果您要使用http-equiv，则必须将其用作<meta http-equiv="Content-Type" content="text/html; charset=utf-8">。但是，这只是 <meta charset="utf-8"> 的另一种说法，所以请使用缩写形式。
我应该这样声明字符集吗:
<meta http-equiv="content-type" content="text/html" charset="utf-8" />
或者像这样：
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
或者两者都有效？
这两个声明都是有效的，您总是可以使用简短的等效版本：
<meta charset="utf-8" />
希望对您有所帮助。
因为您以
开始文档<!DOCTYPE html>
我怀疑是否有必要指定内容类型。而只是指定 encoding/charset:
<head>
<meta charset="UTF-8">
</head>
根据@Alohci 的评论更新。
见W3C's documentation on <meta http-equiv="...">:
encoding declaration state (
http-equiv="content-type")The encoding declaration state is just an alternative form of setting the
charsetattribute: it is a character encoding declaration. This state's user agent requirements are all handled by the parsing section of the specification.For meta elements with an
http-equivattribute in the Encoding declaration state, the content attribute must have a value that is an ASCII case-insensitive match for a string that consists of: the literal string"text/html;", optionally followed by any number of space characters, followed by the literal string"charset=", followed by one of the labels of the character encoding of the character encoding declaration.A document must not contain both a meta element with an
http-equivattribute in the encoding declaration state and a meta element with thecharsetattribute present. (emphasis mine)
因此，如果您要使用http-equiv，则必须将其用作<meta http-equiv="Content-Type" content="text/html; charset=utf-8">。但是，这只是 <meta charset="utf-8"> 的另一种说法，所以请使用缩写形式。