具有ASCII> 128在Javascript中没有正确读取 [英] Characters with ASCII > 128 are not correctly read in Javascript

问题描述

我有一个包含Javascript文件的HTML。这个脚本包含一个特殊字符，ASCII 152.当我尝试显示charCodeAt，我得到不同的结果，但从来没有正确的。你能请教吗？感谢

TEST.HTML

  < script type =text / javascriptcharset = SEE BELOW src =test.js> 
< / script> 
  

使用ANSI编码的TEST.JS文件

 函数d（a）
 {
a =（a +）。 
 alert（a [1] .charCodeAt（0））; 
}; 
 d（i〜g）; // Note that〜is 152 in ASCII 
  

• TEST.HTML with x用户定义的字符集：alert显示63384.使用％63232工作，因为每个字符> 128显示为63232 +字符。


• TEST.HTML与utf-8字符集：alert显示65533


• TEST.HTML与Windows-1252字符集：alert显示752.我找不到ASCII和显示内容之间的关系。

使用UTF-8编码的TEST.JS文件

  function d（a）
 {
a =（a +）。 
 alert（a [1] .charCodeAt（0））; 
}; 
 d（i [x98] g）; //注意x98是152 
  

• TEST.HTML with x-user


• 使用utf-8字符集的TEST.HTML：alert显示65533.所有字符> 128显示为65533。显示65533.所有字符> 128显示为65533。


• TEST.HTML与Windows-1252字符集：alert显示65533.所有字符> 128显示为65533.

<对于utf8，范围128-255中没有字符，ASCII完全在127结束...还有位置 1 <=>的字符 / code>在i [x98] g是[，<$ c

您的函数可以替换为 str.charCodeAt（1） ）。

字符〜是
Unicode字符SMALL TILDE（U + 02DC ，可写为\\\˜或 String.fromCharCode（732）

I have a HTML that includes a Javascript file. This script contains a special character, ASCII 152. When I try to display the charCodeAt, I get different results, but never the right one. Could you please advice? Thanks

TEST.HTML

<script type="text/javascript" charset=SEE BELOW src="test.js">
</script>

TEST.JS file with ANSI encoding

function d(a)
{
a=(a+"").split("");
alert(a[1].charCodeAt(0));
};
d("i˜g"); // Note that ˜ is 152 in ASCII

• TEST.HTML with x-user-defined charset: alert shows 63384. With %63232 works, as every char >128 is displayed as 63232+char.
• TEST.HTML with utf-8 charset: alert shows 65533. All chars > 128 are displayed as 65533.
• TEST.HTML with Windows-1252 charset: alert shows 752. I cannot find a relation between ASCII and what is displayed.

TEST.JS file with UTF-8 encoding

function d(a)
{
a=(a+"").split("");
alert(a[1].charCodeAt(0));
};
d("i[x98]g"); // Note that x98 is 152

• TEST.HTML with x-user-defined charset: alert shows 65533. All chars > 128 are displayed as 65533.
• TEST.HTML with utf-8 charset: alert shows 65533. All chars > 128 are displayed as 65533.
• TEST.HTML with Windows-1252 charset: alert shows 65533. All chars > 128 are displayed as 65533.

解决方案

There is no characters in range 128-255 for utf8, and ASCII ends completely at 127... Also the character at position 1 in "i[x98]g" is a "[", the "[x98]" is meaningless.

Your function can be replaced with str.charCodeAt(1).

The character ˜ is Unicode Character 'SMALL TILDE' (U+02DC and can be written as "\u02DC", or String.fromCharCode(732)

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