带有换行符的JavaScript字符串 - 但不使用\ n [英] JavaScript string with new line - but not using \n

问题描述

我有一个包含新行的字符串。我想将它们转换为HTML < br> s，但我很难检测到它们。

I have a string that has new lines in. I am wanting to convert these to HTML <br>s, but I'm having a hard time detecting them.

想象一下这样设置的JavaScript字符串：

Imagine a JavaScript string set like this:

var foo = "Bob
is
cool";

它们是我需要检测的那种新行。他们没有使用 \ n 特殊字符 - 它们只是普通格式。

They are the kind of new lines that I need to detect. They aren't using the \n special character - they are just plain format.

推荐答案

它不起作用的原因是因为javascript字符串必须在下一个换行符之前终止（显然不是 \ n ）。 \ n 存在的原因是允许开发人员轻松地将换行符（ASCII：10）放入其字符串中。

The reason it is not working is because javascript strings must be terminated before the next newline character (not a \n obviously). The reason \n exists is to allow developers an easy way to put the newline character (ASCII: 10) into their strings.

当你有一个如下所示的字符串：

When you have a string which looks like this:

//Note lack of terminating double quote
var foo = "Bob 

您的代码在此时会出现语法错误并停止运行。

Your code will have a syntax error at that point and cease to run.

如果您希望有一个跨越多行的字符串，您可以插入一个反斜杠字符' \ '就在您终止该行之前，如下所示：

If you wish to have a string which spans multiple lines, you may insert a backslash character '\' just before you terminate the line, like so:

//Perfectly valid code
var foo = "Bob \
is \
cool.";

然而该字符串将 包含 \ n 字符串被分成不同行的位置。将换行符插入字符串的唯一方法是插入一个字符串值为10的字符，最简单的方法是 \ n 转义字符。

However that string will not contain \n characters in the positions where the string was broken into separate lines. The only way to insert a newline into a string is to insert a character with a value of 10, the easiest way of which is the \n escape character.

var foo = "Bob\nis\ncool.";

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