diff --git a/dist/tinycopy.js b/dist/tinycopy.js
index 79f5b5e..d1805b5 100644
--- a/dist/tinycopy.js
+++ b/dist/tinycopy.js
@@ -19,24 +19,21 @@ var TinyCopy = function () {
 
     _classCallCheck(this, TinyCopy);
 
-    this.listeners = {};
-
     if (!TinyCopy.isElement(trigger)) {
       throw new Error('Illegal arguments error: trigger');
     }
+    if (!TinyCopy.isElement(target) && !TinyCopy.isText(target)) {
+      throw new Error('Illegal arguments error: target');
+    }
 
-    var value = function (target) {
-      if (TinyCopy.isElement(target)) {
-        return target.value;
-      } else if (TinyCopy.isText(target)) {
-        return target;
-      } else {
-        throw new Error('Illegal arguments error: target');
-      }
-    }(target);
+    this.listeners = {};
+
+    var getValue = function getValue(target) {
+      return TinyCopy.isText(target) ? target : target.value;
+    };
 
     trigger.addEventListener('click', function () {
-      TinyCopy.exec(value, function (err, data) {
+      TinyCopy.exec(getValue(target), function (err, data) {
         if (!err) {
           _this.emit('success', data);
         } else {
diff --git a/dist/tinycopy.min.js b/dist/tinycopy.min.js
index 152d46c..94d2b26 100644
--- a/dist/tinycopy.min.js
+++ b/dist/tinycopy.min.js
@@ -1 +1 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.TinyCopy=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){"use strict";Object.defineProperty(exports,"__esModule",{value:true});var _createClass=function(){function defineProperties(target,props){for(var i=0;i<props.length;i++){var descriptor=props[i];descriptor.enumerable=descriptor.enumerable||false;descriptor.configurable=true;if("value"in descriptor)descriptor.writable=true;Object.defineProperty(target,descriptor.key,descriptor)}}return function(Constructor,protoProps,staticProps){if(protoProps)defineProperties(Constructor.prototype,protoProps);if(staticProps)defineProperties(Constructor,staticProps);return Constructor}}();function _classCallCheck(instance,Constructor){if(!(instance instanceof Constructor)){throw new TypeError("Cannot call a class as a function")}}var TinyCopy=function(){function TinyCopy(trigger,target){var _this=this;_classCallCheck(this,TinyCopy);this.listeners={};if(!TinyCopy.isElement(trigger)){throw new Error("Illegal arguments error: trigger")}var value=function(target){if(TinyCopy.isElement(target)){return target.value}else if(TinyCopy.isText(target)){return target}else{throw new Error("Illegal arguments error: target")}}(target);trigger.addEventListener("click",function(){TinyCopy.exec(value,function(err,data){if(!err){_this.emit("success",data)}else{_this.emit("error",err)}})})}_createClass(TinyCopy,[{key:"on",value:function on(event,action){this.listeners[event]=action;return this}},{key:"emit",value:function emit(event){this.listeners[event]&&this.listeners[event].apply(null,[].slice.call(arguments,1))}}],[{key:"createTempElement",value:function createTempElement(value){var element=document.createElement("input");element.style.opacity="0";element.setAttribute("readonly","");element.value=value;return element}},{key:"exec",value:function exec(value,callback){var temp=TinyCopy.createTempElement(value);document.body.appendChild(temp);temp.select();try{if(document.execCommand("copy")){callback(null,value)}else{callback(new Error("Not supported the execCommand."),null)}}catch(e){callback(new Error("Not supported the execCommand."),null)}finally{document.body.removeChild(temp)}}},{key:"isElement",value:function isElement(node){return!!(node&&(node.nodeName||node.prop&&node.attr&&node.find))}},{key:"isText",value:function isText(obj){return TinyCopy.is("String",obj)||TinyCopy.is("Number",obj)}},{key:"is",value:function is(type,obj){var clazz=Object.prototype.toString.call(obj).slice(8,-1);return obj!==undefined&&obj!==null&&clazz===type}}]);return TinyCopy}();exports.default=TinyCopy;module.exports=exports["default"]},{}]},{},[1])(1)});
\ No newline at end of file
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.TinyCopy=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){"use strict";Object.defineProperty(exports,"__esModule",{value:true});var _createClass=function(){function defineProperties(target,props){for(var i=0;i<props.length;i++){var descriptor=props[i];descriptor.enumerable=descriptor.enumerable||false;descriptor.configurable=true;if("value"in descriptor)descriptor.writable=true;Object.defineProperty(target,descriptor.key,descriptor)}}return function(Constructor,protoProps,staticProps){if(protoProps)defineProperties(Constructor.prototype,protoProps);if(staticProps)defineProperties(Constructor,staticProps);return Constructor}}();function _classCallCheck(instance,Constructor){if(!(instance instanceof Constructor)){throw new TypeError("Cannot call a class as a function")}}var TinyCopy=function(){function TinyCopy(trigger,target){var _this=this;_classCallCheck(this,TinyCopy);if(!TinyCopy.isElement(trigger)){throw new Error("Illegal arguments error: trigger")}if(!TinyCopy.isElement(target)&&!TinyCopy.isText(target)){throw new Error("Illegal arguments error: target")}this.listeners={};var getValue=function getValue(target){return TinyCopy.isText(target)?target:target.value};trigger.addEventListener("click",function(){TinyCopy.exec(getValue(target),function(err,data){if(!err){_this.emit("success",data)}else{_this.emit("error",err)}})})}_createClass(TinyCopy,[{key:"on",value:function on(event,action){this.listeners[event]=action;return this}},{key:"emit",value:function emit(event){this.listeners[event]&&this.listeners[event].apply(null,[].slice.call(arguments,1))}}],[{key:"createTempElement",value:function createTempElement(value){var element=document.createElement("input");element.style.opacity="0";element.setAttribute("readonly","");element.value=value;return element}},{key:"exec",value:function exec(value,callback){var temp=TinyCopy.createTempElement(value);document.body.appendChild(temp);temp.select();try{if(document.execCommand("copy")){callback(null,value)}else{callback(new Error("Not supported the execCommand."),null)}}catch(e){callback(new Error("Not supported the execCommand."),null)}finally{document.body.removeChild(temp)}}},{key:"isElement",value:function isElement(node){return!!(node&&(node.nodeName||node.prop&&node.attr&&node.find))}},{key:"isText",value:function isText(obj){return TinyCopy.is("String",obj)||TinyCopy.is("Number",obj)}},{key:"is",value:function is(type,obj){var clazz=Object.prototype.toString.call(obj).slice(8,-1);return obj!==undefined&&obj!==null&&clazz===type}}]);return TinyCopy}();exports.default=TinyCopy;module.exports=exports["default"]},{}]},{},[1])(1)});
\ No newline at end of file
diff --git a/src/main.js b/src/main.js
index 991d1a6..6ac2742 100644
--- a/src/main.js
+++ b/src/main.js
@@ -9,24 +9,21 @@ export default class TinyCopy {
 
   constructor(trigger: HTMLElement, target: HTMLInputElement|string) {
 
-    this.listeners = {};
-
     if (!TinyCopy.isElement(trigger)) {
       throw new Error('Illegal arguments error: trigger');
     }
+    if (!TinyCopy.isElement(target) && !TinyCopy.isText(target)) {
+      throw new Error('Illegal arguments error: target');
+    }
 
-    const value: string = ((target: any): string => {
-      if (TinyCopy.isElement(target)) {
-        return target.value
-      } else if(TinyCopy.isText(target)) {
-        return target
-      } else {
-        throw new Error('Illegal arguments error: target');
-      }
-    })(target);
+    this.listeners = {};
+
+    const getValue: Function = (target: any): string => {
+      return TinyCopy.isText(target) ? target : target.value;
+    }
 
     trigger.addEventListener('click', () => {
-      TinyCopy.exec(value, (err, data) => {
+      TinyCopy.exec(getValue(target), (err, data) => {
         if (!err) {
           this.emit('success', data);
         } else {