What is the function that can remove both leading and trailing whitespace from a string?

The function that can remove leading and trailing whitespace from a string at the same time is: trim(). The trim() function is used to delete the leading and trailing whitespace characters of a string. The whitespace characters include: spaces, tabs, newlines and other whitespace characters; its syntax format is "string.trim()".

The operating environment of this tutorial: Windows 7 system, ECMAScript version 5, Dell G3 computer.

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JavaScript trim()

trim() method is used to delete characters The whitespace characters at the beginning and end of the string 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: Returns a string with leading and trailing spaces removed.

Example:

    
  
点击按钮移除字符串的头尾空格。
 点我   

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