JavaScript String.Strip

strip.string.js

var strip = function(string, characters) {
    if(!characters) {
        if(typeof String.prototype.trim !== undefined) {
            // Simply use the String.trim as a default
            return String.prototype.trim.call(string);
         } else {
            // set characters to whitespaces
            characters = "\s\uFEFF\xA0";
         }
    }
    // Characters is set at this point forward
    // Validate characters just in case there are invalid usages
    var escaped = characters.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, '\\$1');
    
    var target = new RegExp('^[' + escaped + ']+|[' + escaped + ']+$');
    
    // Remove the characters from the string
    return string.replace(target, '');
};