What is the function that removes spaces on the left and right of a string at the same time?

The function that removes spaces on the left and right sides of a string at the same time is "trim()"; the trim() function can be used to delete the leading and trailing whitespace characters of a string. The whitespace characters include: spaces, tabs, and newlines. characters and other whitespace characters, etc., the syntax is "string.trim()".

The operating environment of this tutorial: windows10 system, javascript1.8.5, this article is applicable to all brands of computers.

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The function that simultaneously removes spaces on the left and right of a string is trim().

Thetrim() method is used to delete 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:

• Returns a string with leading and trailing spaces removed.

Example:

<script>
  var str = "     hello     ";
  alert("原字符串："+str+"\n"+"新字符串："+  str.trim());
</script>

Output:

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