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String.prototype.trim()

The trim() method removes whitespace from both ends of a string and returns a new string, without modifying the original string. Whitespace in this context is all the whitespace characters (space, tab, no-break space, etc.) and all the line terminator characters (LF, CR, etc.).

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Syntax

trim()

Return value

A new string representing str stripped of whitespace from both its beginning and end.

If neither the beginning or end of str has any whitespace, a new string is still returned (essentially a copy of str), with no exception being thrown.

To return a new string with whitespace trimmed from just one end, use trimStart() or trimEnd().

Examples

Using trim()

The following example displays the lowercase string 'foo':

var orig = '   foo  ';
console.log(orig.trim()); // 'foo'

Specifications

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet Deno Node.js
Trim
4
12
3.5
10
10.5
5
≤37
18
4
11
5
1.0
1.0
0.10.0

See also

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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/Trim