Add white space in the beginning and the end of a string

Question

I want to add the white space in the beginning and the end of a string if there isn't.

If there is a whitespace at the beginning it will add at the end, and if there is at the end will add at the beginning

var string='This is test';

=>

var string=' This is test ';

or

var string='This is test ';

=> will only add at the beginning

var string=' This is test ';

Answer 1

This is simple. Check below:

 let string ='This is test'; console.log(string); // No space console.log(" " + string.trim() + " "); // space at start and end 

Answer 2

You can try this code.

    var string='This is test ';
    var result = " "+string.trim()+" "; //trim will remove white space before and after string
    alert(result);

Answer 3

只需尝试删除所有可能的空格，然后在开头和结尾处手动添加一个空格即可：

string = ' ' + string.trim() + ' '

Answer 4

Use regex and capturing. ^\\ |\\ $|(^\\ \\ $) will match beginning space, ending space, and both: use accordingly