Implementation of TrimStart, TrimEnd, Trim in javascript in C#

= function(trimStr){
if(!trimStr){return this;}
var temp = this;
while(true){
if((0,)!=trimStr){
break;
}
temp = ();
}
return temp;
};
= function(trimStr){
if(!trimStr){return this;}
var temp = this;
while(true){
if((,)!=trimStr){
break;
}
temp = (0,);
}
return temp;
};
= function(trimStr){
var temp = trimStr;
if(!trimStr){temp=" ";}
return (temp).trimEnd(temp);
};