Removing whitespace

Given a string, remove leading or trailing whitespaces and return a new string.

Sample Code:

function rmvSpace(str) {
// Enter your logic here...
}

Examples:

Input: 'Tom and Jerry '
Output: 'Tom and Jerry'
Explanation: Whitespaces are removed from both sides of the string.

Input: '  Javascript  '
Output: 'Javascript'
Explanation: Whitespaces are removed from both sides of the string.