Some misconceptions about JavaScript this

Being too wedded to the literal meaning of "this" will create some misunderstanding. There are two common explanations for this, but they are all wrong.Explain what the dynamic scope is before the introductionBriefly analyze the dynamic scope and

JavaScript function scope and this point to the detailed

First, to say a simple concept-variable promotion:By means of the function+ function name, the declared function can be called anywhere in the code;  In the way that variables are defined by VAR, the declared function must be called after the

JavaScript Global method

1. encodeURI (URI)A, the role: is the Uniform Resource Identifier (URI) encoding method;B, Parameter: is a complete URI;C. Features: No need to encode reserved words and characters that have special meaning in the URI.(1), reserved characters: ; , /

JavaScript date format (JS dates formatted)

Method One:An extension to date that converts date to a string of the specified formatThe month (m), Day (d), hour (h), Minute (m), second (s), quarter (q) can be used with 1-2 placeholders,Year (y) can use 1-4 placeholders, milliseconds (S) with

Understand javascript--scopes and assignment operations

Scopes, as a basic function, exist in a variety of programming languages, making our programming more flexible and interesting. The underlying function is to store the values in the variables and then access and modify the values.Maybe we all know

JavaScript's object-oriented explanation

Every time I talk about JavaScript to object-oriented, I always feel that I understand, but do not know how to say, this is indefinitely to performance, so, every time a said, will go everywhere to find information, bits and pieces to see some, feel

JavaScript short-circuit operation | | and &&

1, as long as "| |" False before, regardless of ' | | ' Followed by true or FALSE, the result returns "| |" The value that follows.2, as long as "| |" Preceded by true, regardless of "| |" Followed by true or FALSE, the result returns "| |" The

The false value of a wonderful flower in JavaScript

There are 6 values of "false" in JavaScript, and these six values are: False Null Undefined 0 "(empty string) NaN In this case, false itself is a Boolean type, and the other 5 are not.In addition to these 6, the

JavaScript: Basic Extensions (1)--json

JavaScript: Extending Knowledge (1)--jsonUnderstanding:The most important thing about JSON is to understand that it is a data format, not a programming language . Although it has the same syntactic form, JSON does not belong to JavaScript. Also,

JavaScript Scope Chain Understanding

execution context (execution context, referred to as EC)Concept every time the controller arrives at the ECMAScript executable code, it enters an execution context. In JavaScript, EC is divided into three types: global level Code (Global execution

JavaScript base substr (1) ignores the first character, extracting the string from the index=1 character to the end

Town Field Poem:The Pure Heart sentiment wisdom language, does not have the world name and the benefit. Learn water under the hundred rivers, give up arrogant slow meaning.Learn to have a small return to feed root, willing to cast a conscience blog.

JavaScript Basics Click a hyperlink to delete a row in a table Parentnode.removechild

Town Field Poem:The Pure Heart sentiment wisdom language, does not have the world name and the benefit. Learn water under the hundred rivers, give up arrogant slow meaning.Learn to have a small return to feed root, willing to cast a conscience blog.

JavaScript base mouse on trigger event onmouseover Mouse Move trigger event onmouseout

Town Field Poem:The Pure Heart sentiment wisdom language, does not have the world name and the benefit. Learn water under the hundred rivers, give up arrogant slow meaning.Learn to have a small return to feed root, willing to cast a conscience blog.

JavaScript Design Patterns: First, object-oriented programming

JavaScript Object-Oriented programmingAs we all know, JS as a scripting language, because its designers in the design of JS, but also only a little time to complete the creation of JS this language, JS although the advantages of scripting language,

Two ways JavaScript gets the key name of a JSON object

JavaScript gets the JSON object's key name in two ways of data processing, you may receive a JSON object in an indeterminate content format, and then extract the value of the key. Today, we tried two methods to extract the JSON key, all of which

javascript-Read you Dont Know js,this what exactly is

Front-end Technology update soon, a few months ago I was still writing react, and now someone suggested I learn vue. After thinking, I decided to sink my mind to fill the JavaScript base. You Dont Know js a series of books good. This series of blogs

Get page height in JavaScript (knowledge point)

Width of the visible area of the Web page: document.body.clientWidthHeight of the visible area of the Web page: document.body.clientHeightWidth of the visible area of the page: Document.body.offsetWidth (including the width of the edge)Height of the

JavaScript class definition and reference JavaScript advanced training custom object _ js object-oriented

In Java, we can define our own classes and create objects based on these classes for use. In Javascript, we can also define our own classes, for example, define the User class and Hashtable class. I. Overview In Java, we can define our own classes

10 tips to make you a better Node developer in 2017

10 suggestions will be listed below. These suggestions can help you become a better Node developer in 2017. Some of the suggestions I learned in my daily practice, and others learned from those who wrote the most popular Node and npm modules. The

JavaScript learning summary [2] JS Basics

Naming Conventions are necessary to enhance the readability of the Code, so that you can understand what you want to express at a Glance. Standards are rules that make the code easier for later maintenance, it can also greatly improve the

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