What is the usage of javascript trim?

The javascript trim method is used to remove the leading and trailing whitespace characters of a string. Its usage syntax is "string.trim()", and the return value is a string with the leading and trailing spaces removed.

The operating environment of this article: Windows 7 system, javascript version 1.8.5, DELL G3 computer

javascript trim What is the usage?

JavaScript trim() method:

trim() method is used to remove the leading and trailing whitespace characters of a string. The whitespace characters include: Spaces, tabs, newlines and other whitespace characters.

The trim() method does not change the original string.

trim() method is not applicable to null, undefined, Number types.

Syntax

string.trim()

Return value

String, returns a string with leading and trailing spaces removed.

Example

If your browser does not support the trim() method, you can use regular expressions to achieve it:

function myTrim(x) {
  return x.replace(/^\s+|\s+$/gm,'');
}
 
function myFunction() {
  var str = myTrim("        Runoob        ");
  alert(str);
}

Output result:

Runoob

Recommended learning: "javascript basic tutorial"

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