使用Javascript在Textarea中查找文本行

Question

I saw some code a couple of days ago but I can't find it again. I have a textarea and there is [source] word inside the textarea. I want to find this word's line.

Code was like this:

document.getElementById('').value.match(/[source]/i).length

However I miss the code and I can't find it again. I don't want to do with loop. It was really easy code.

Answer 1

This?

   content = "foo\n bar [source] baz\n quux"
   content.match(/.*\[source\].*/)[0]
   // " bar [source] baz"

To find a line number (without loops)

 line = content.match(/[\s\S]*(?=\[source\])/)[0].replace(/[^\n]/g, "").length

Although a loop would be definitely more readable.

Answer 2

Well, first of all; you spelled "Source" wrong in your example. When searching for exact matches, you want to get the spelling correctly.

Also; it would help a lot if you told us in what context you would like to find "[source]" inside a textarea. Because; if you know it's there, why do you need to find it?