JS Tidbits

js-examples.js

alert(this)
window.alert(window)


location.href = "http://google.com";


var o = new Object();
o.name = "bob";
o.age = 37;
console.log(o.name);
delete o.age;

// Object literal notation
var bob = {
	name: "bob",
	age: 37,
	talk: function() {
		alert(this.name);
	},
	yearBorn: function() {
		var now = new Date();
		return now.getYear() - this.age;
	}
}

var Person = function(name, age) {
	this.name = name;
	this.age = age;
	this.talk = function() { alert(this.name); }
}
var al = new Person("al", 48);
al['talk']()


var callback = function(x, y) {
	alert(x+y);
}
callback(2,3);

Array.prototype.forEach = function(cb) {
	for(var i = 0; i < this.length; i ++) {
		cb(this[i]);
	}
}
[1,2,3].forEach(window.alert);

String.prototype.parseInt = function() {
	return parseInt(this);
}

String.prototype.alert = function(str) {
	alert(str);
}

var gallery = document.createElement("div");
gallery.id = gallery;
document.getElementsByName("body")[0].appendChild(gallery);

var img = new Image();
img.src = "/image.jpg";
img.alt ="...";

var gallery = document.getElementById("gallery");
gallery.appendChild(img);


var script = document.createElement("script");
script.src="file.js";
script.type="text/javascript";
document.getElementsByTagName("head")[0].appendChild(script);