JSFiddle - React, Tailwind, and code Playground

by alfredbing

HTML

Javascript擴充方法

JavaScript

//String擴充方法 - Contains
String.prototype.Contains= function(str){
    return (this.indexOf(str) != -1);
}
String.prototype.IsFilled = function () {
    if (this && this.length > 0) {
        return true;
    }
    return false;
} 
String.prototype.IsEmpty = function () {
    return !this.IsFilled();
}

//function擴充方法 - getData
sample.prototype.getData = function() { 
    return this.i; 
}

//==============================================

//String使用擴充方法
var name="Loek van den Ouweland";
alert("foobar".Contains("foo")); //alerts true
alert(name.IsFilled()); //alerts true
alert(name.IsEmpty()); //alerts false

//Function使用擴充方法
function sample(i) { 
    this.i = i;     
}
var s = new sample(42);
alert(s.getData()); //alerts 42