myModule = function(){
var current = null;
function init(){...}
function change(){...}
function verify(){...}
}();It is easy to call functions and access variables from other places without having to go through the myModule:
myModule = function(){
var current = null;
function init(){...}
function change(){...}
function verify(){...}
return{
init:init,
set:change
}
}();Calling myModule.set() will now invoke the change() method.
myModule = function(){
var current = null;
function init(){...}
function change(){...}
function verify(){...}
return{
init:init,
set:change
}
}();
myModule.set()It is private or protected, use
var Person = (function() {
var _trueAge = 50,
_trueWeight = 140;
return {
age : _trueAge - 15,
weight : _trueWeight - 30
};
})();
Person.age; // 35
Person.weight; // 110
Person._trueAge; // undefined (cause it's private, yo)If the variable is a constant, never change his value, write it uppercase
var SPEEDOFLIGHT = 299,792; // kilometers per seconda - array b - boolean f - float fn - function i - integer n - node o - object s - string
var aData = [1, 2, 3];
var bFound = false;
var fGoldenRatio = 1.618;
var fnCallback = function() { };
var iCurrentPage = 1;
var nNewRow = document.createElement("tr");
var oSettings = {
type: "GET",
url: "test.json",
dataType: "jsonp"
};
var sLabel = "First Name";More: https://www.darklaunch.com/javascript-hungarian-notation-variable-prefix-naming-convention
In old JavaScript version, we don't have classes but constructor functions yes
function Person(name) {
// If the new keyword is absent, the constructor will be the window.
// In this case, compensate, and return a new instance
if ( this.constructor !== Person ) {
return new Person(name);
}
this.name = name;
}
// Intentionally forgot the "new" keyword
var Joey = Person('Joey');
Joey.name; // Joey
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