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anasnakawa/self-01.js

Last active August 29, 2015 14:01
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self-01.js
function Car() {
this.array = [];
this.log = function() {}
}
Car.prototype.something = function() {
var self = this; // <- fine
this.array.forEach( function(item) {
self.log( item );
});
}
Raw
self-02.js
var self; // <- bad
function Car() {
this.array = [];
this.log = function() {}
}
Car.prototype.something = function() {
self = this;
this.array.forEach( function(item) {
self.log( item );
});
}
Raw
self-03.js
(function() {
var self; // <- really bad
function Car() {
this.array = [];
this.log = function() {}
}
Car.prototype.something = function() {
self = this;
this.array.forEach( function(item) {
self.log( item );
});
}
window.Car = Car;
})();
Raw
self-04.js
(function() {
function Car() {
this.array = [];
this.log = function() {}
}
Car.prototype.something = function() {
self = this; // omiting var in non `strict-mode`, will let variable became global
this.array.forEach( function(item) {
self.log( item );
});
}
window.Car = Car;
})();
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