Trim spaces from starting and ending of string using javascript

Trim spaces from starting and ending of string using javascript

function removeSpace () 
{
var str=document.getElementById("tex").value;
str[t] = str[t].replace(/^\s+/, '');
for (var i = str.length - 1; i >= 0; i--) {
     if (/\S/.test(str.charAt(i))) {
                      str = str.substring(0, i + 1);
                      break;
                      }
      }
  }
  return str;
            }

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