javascript understanding weird parts

This article mainly introduces a deep understanding of the JavaScript series (27): a detailed explanation of the builder mode of design patterns. The Builder mode can separate the construction of a complex object from its representation, this allows you to create different representations for the same build process. For more information, see Introduction In a software system, sometimes it is faced with the

1. General use 2. This.x and apply (), call () 3. Meaningless (weird) this use 4. This in the event listener function 5. Summary The this variable is an elusive keyword in JavaScript, and this is a very powerful, well-understood knowledge of this that helps us to be able to write object-oriented JavaScript programs.1. General useThe most nece

DescriptionThis tutorial revolves around some basic JavaScript syntax, directly explaining the two most difficult parts of JavaScript, and the two most significant differences from other mainstream object-oriented languages- prototypes and scopes, certainly without the prototype chain and scope chain. Help you uncover the most mysterious veil of JavaScript.Why do

1. General use 2. This.x and apply (), call () 3. Meaningless (weird) this use 4. This in the event listener function 5. Summary The this variable is an elusive keyword in JavaScript, and this is a very powerful, well-understood knowledge of this that helps us to be able to write object-oriented JavaScript programs.1. General useThe most nece

1. General use 2. This.x and apply (), call () 3. Meaningless (weird) this use 4. This in the event listener function 5. Summary The this variable is an elusive keyword in JavaScript, and this is a very powerful, well-understood knowledge of this that helps us to be able to write object-oriented JavaScript programs.1. General useThe most nece

1. General use 2. This.x and apply (), call () 3. Meaningless (weird) this use 4. This in the event listener function 5. Summary The this variable is an elusive keyword in JavaScript, and this is a very powerful, well-understood knowledge of this that helps us to be able to write object-oriented JavaScript programs.1. General useThe most nece

javascript| function function is the basis of modular programming, writing complex AJAX applications, you must have a more in-depth understanding of the function. Functions in JavaScript are different from other languages, and each function is maintained and run as an object. By the nature of the function object, it is convenient to assign a function to a variabl

Overview function is the basis of modular programming, writing complex AJAX applications, you must have a more in-depth understanding of the function. Functions in JavaScript are different from other languages, and each function is maintained and run as an object. By the nature of the function object, it is convenient to assign a function to a variable or to pass the function as a parameter. Before continu

ajax| function function is the basis of modular programming, writing complex AJAX applications, you must have a more in-depth understanding of the function. Functions in JavaScript are different from other languages, and each function is maintained and run as an object. By the nature of the function object, it is convenient to assign a function to a variable or to pass the function as a parameter. Before co

If you haven't contacted a dynamic language, it will be a magical and weird feeling to understand JavaScript in a compiled language, because the things that are often impossible in consciousness happen, and even feel unreasonable. If you're learning JavaScript in a free and changing language, this is the way you feel. , then from now on, please put down your "pre

ajax|javascript| function Overviewfunction is the basis of modular programming, writing complex AJAX applications, you must have a more in-depth understanding of the function. Functions in JavaScript are different from other languages, and each function is maintained and run as an object. By the nature of the function object, it is convenient to assign a function

Original article: Understanding JavaScript closures To become advanced JavascriptProgramYou must understand the closure. This document describes the internal working mechanism of closures in conjunction with The ECMA 262 specification, it allows JavaScript programmers to understand closures from "nested functions" to the running mechanism behind

deep understanding of JavaScript operating mechanism PrefaceThis article is written in the training for the new team, so in fact, the audience is a small partner who does not understand or understand the operating mechanism of JavaScript。 In other words, the real principle is not exactly the same as the one described in this article, like a high school textbook

Overview function is the basis of modular programming, writing complex AJAX applications, you must have a more in-depth understanding of the function. Functions in JavaScript are different from other languages, and each function is maintained and run as an object. By the nature of the function object, it is convenient to assign a function to a variable or to pass the function as a parameter. Before continu

Overview function is the basis of modular programming, writing complex AJAX applications, you must have a more in-depth understanding of the function. Functions in JavaScript are different from other languages, and each function is maintained and run as an object. By the nature of the function object, it is convenient to assign a function to a variable or to pass the function as a parameter. Before continu

colon. The Set (array) of the parallel data is represented by square brackets. The ing set (object) is represented by braces. With these four rules (coupled with the understanding of Functions), you can understand many seemingly "weird" statements. Therefore, a JavaScript Object is actually an array or ing.For differences between arrays and mappings,

Preface This chapter is to explain the s.o.l.i.d Five principles of JavaScript implementation of the 5th, the dependency inversion principle LSP (the Dependency inversion Principle). English Original: http://freshbrewedcode.com/derekgreer/2012/01/22/solid-javascript-the-dependency-inversion-principle/the dependency inversion principle relies on the inversion principle described as: a. High-level modules sho

Private methods JavaScript this book does not provide a specific syntax to support private properties and private methods, but we can implement them by closures, the code is as follows:functionGadget () {//Private Objects varname = ' IPod '; //Public Functions This. GetName =function () { returnname; };}varToy =NewGadget ();//name not defined, is privateConsole.log (Toy.name);//undefined//Public method Access nameConsole.log (Toy.getnam

Introduction The last two articles in the deep understanding of the Javascript series have finally been completed. The so-called "complete" is not accurate, because many of the contents have not been written, such as high performance, Ajax security, Dom explanation, and JavaScript architecture. However, due to experience limitations and uncle's hope to write som

attributes and private methods Javascript book does not provide specific syntax to support private attributes and private methods, but we can implement it through closures. The Code is as follows: Function Gadget (){ // Private object VaR Name = 'ipod'; // Public Functions This . Getname = Function (){ Return Name ;};} VaR Toy = New Gadget (); // The name is undefined and is private. Console. Log (toy. Name ); // Undefined