在javascript函数中插入多行字符串作为变量 [英] inserting multiline string as a variable in a javascript function

问题描述

我想通过RJS插入一个取自textarea的多行字符串。执行：

I want to insert, via RJS a multiline string taken from a textarea. Doing:

$('#description').text('<%= simple_format description %>');

不起作用，因为它会生成如下内容：

does not work because it will generate something like this:

$('#description').text('<p>first line
<br />second line</p>

<p>fourth line</p>');

因为字符串不在一行上，所以JS调用失败。那么现在simple_format正确地格式化了字符串，如何在RJS文件中将它全部打印在一行？

Because the string isnt on a single line, the JS call fails. So now that simple_format formatted the string correctly, how can I have it all print on a single line in my RJS file?

推荐答案

试试这个：

$('#description').text('<%= simple_format(description).gsub("\n", "\\n").gsub("\r", "\\r").gsub("\t", "\\t").gsub("'","\\'")  %>');

这用Javascript理解的转义序列替换了换行符。类似于其他字符，如回车和制表符。此外，它将'字符串定义字符替换为带有转义序列的字符，以便诸如It's mine之类的字符串不会引起任何意外。

This replaces the newline character with an escape sequence Javascript understands. Similarly for other characters like carriage-return and tab. Moreover it replaces the ' character which is a string delimiter character with an escape sequence for it so that a string such as "It's mine" does not cause any surprises.

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