Javascript - Remove '\n' from string

Question

var strObj = '\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n{"text": true, ["text", "text", "text", "text"], [{ "text", "text" }]}\n\n\n'

I am trying to sanitize a string by stripping out the \n but when I do .replace(/\\\n/g, '') it doesn't seem to catch it. I also Google searched and found:

..in accordance with JavaScript regular expression syntax you need two backslash characters in your regular expression literals such as /\\/ or /\\/g.

But even when I test the expression just to catch backslash, it returns false: (/\\\/g).test(strObj)

RegEx tester captures \n correctly: http://regexr.com/3d3pe

Is that a typo in your .replace method? Shouldn't that be /\\n/ not /\\\n/? — char
– char, Commented Mar 29, 2016 at 3:08
You only need one backslash: /\n+/g. stackoverflow.com/questions/784539/… — Tacocat
– Tacocat, Commented Mar 29, 2016 at 3:10

epascarello · Accepted Answer · 2016-03-29 03:08:11Z

52

Should just be

.replace(/\n/g, '')

unless the string is actually

'\\n\\n\\n...

that it would be

.replace(/\\n/g, '')

answered Mar 29, 2016 at 3:08

epascarello

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Tushar · Accepted Answer · 2016-03-29 03:20:19Z

24

No need of using RegEx here, use String#trim to remove leading and trailing spaces.

var strObj = '\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n{"text": true, ["text", "text", "text", "text"], [{ "text", "text" }]}\n\n\n';
var trimmedStr = strObj.trim();

console.log('Before', strObj);
console.log('--------------------------------');
console.log('After', trimmedStr);
document.body.innerHTML = trimmedStr;

answered Mar 29, 2016 at 3:20

Tushar

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1 Comment

cam Over a year ago

This is preferable over the regex answer IMO

Mateen Ulhaq · Accepted Answer · 2016-03-29 06:16:34Z

4

You don't need the backslashes.

var strObj = '\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n{"text": true, ["text", "text", "text", "text"], [{ "text", "text" }]}\n\n\n';

strObj.replace(/\n/g, '');

This code works as expected.

"{"text": true, ["text", "text", "text", "text"], [{ "text", "text" }]}"

edited Mar 29, 2016 at 6:16

Mateen Ulhaq

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answered Mar 29, 2016 at 3:08

Matt

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