es6 book

http://es6.ruanyifeng.com/#READMEHttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference(1) Arrow operatorIf you have C # or Java, you must know the lambda expression, the new arrow operator in ES6. It simplifies the writing of functions. The left side of the operator is the input parameter, and the right side is the action to be taken and the value returned inputs=>outputs.We know that the callba

, Elem = C The for-of loop of the ES6 supports ES6 iterations (through Iterables and iterators) and deconstruction. If you use the new method of the array enteries () to combine the deconstruction, you can achieve the same effect as the above ForEach: Const arr = ["A", "B", "C"]; for (const [index, elem] of arr. Entries()) { console. Log('index = ${index}, ele

React native is the direct use of ES6 to write code, many new syntax can improve our productivityDeconstruction Assignmentvar { StyleSheet, Text, View} = React;This code is the new deconstruction (destructuring) assignment statement in ES6. Allows you to get multiple properties of an object and assign them to multiple variables using a single statement.The above code is equivalent to:var StyleSheet = Rea

Why do ES6 have compatibility issues? Because the majority of users use the browser version at the time of release may be earlier than the ES6 and release, and today, if we use the new features of ES6 in programming, if the browser does not have a newer version, or the new version of the ES6 features are not compatible

Module referenceIn ES5, if the CommonJS standard is used, The React package is introduced through require. The code is similar to this:// ES5Var React = require ("react-native ");Var {Image,Text,View,} = React; // reference different React Native componentsIn ES6, the import statement is more standard.// ES6Import React ,{Image,Text,View,} From 'react-native ';Note that only versions later than React Native 0.12 support the import sy

1, the tag is opened defer or the async property , the script will be loaded asynchronously. When the rendering engine encounters this line of command, it begins to download the external script, but does not wait for it to be downloaded and executed, but executes the following command directly.deferasyncthe difference is that the former will not be executed until the entire page is rendered normally, and once downloaded, the rendering engine interrupts rendering, executes the script, and then

Turn:Using Webpack for ES6 developmentSome digressionThe original intention of using Webpack is actually to use React.When learning React, there is always a problem: Since the component is modular, such as a jsx file corresponding to a component, this file contains the HTML and JS of this component, but where should his style be written? The online tutorials are written in the Jsx file, defined by variables, or written directly into the global style.

1 overview The traditional method of JavaScript language is to define and generate new objects by using constructors. Here is an example. function point (x, y) { this.x = x; This.y = y; } Point.prototype.toString = function () {return ' (' + this.x + ', ' + this.y + ') '; var p = new Point (1, 2);The above is very different from the traditional object-oriented language, such as C + + and Java, and it is easy to confuse the new programmer who is learning the language.

Original address: https://hacks.mozilla.org/2015/08/es6-in-depth-modules/ES6 is the abbreviation for the 6th edition of ECMAScript, which is the standard for a new generation of JavaScript. ES6 in Depth is an introduction to a series of new features in ES6.ES6 is the abbrevi

One, the expansion of the array, ES6 in the array to expand some of the API to achieve more functionality1.array.from: You can convert a class array and a data structure that can be traversed to a real array, as shown belowvar a = {' 0 ': 1, ' 1 ': 1,length:2};var arr = Array.from (a); Console.log (arr) Array [1, 1]---------------ES5 implementation-----------var arr = [].slice.call (a); Console.log (arr) Array [1, 1]function Fun () {var arr = array.fr

ES6 new features (Class) and inheritance (Extends) Related Concepts and Usage Analysis, es6extends This article describes the concepts and usage of new features such as ES6 and Extends. We will share this with you for your reference. The details are as follows: I. Class) 1. Basic syntax The traditional method of JavaScript is to define and generate new objects through constructors. The following is an examp

The main difference between the Commonjs module and the ES6 module is that thecommonjs module is a copy, the ES6 module is a reference , but understanding these, first understand the problem of object replication, in retrospect to understand the difference between the two modules.One, the basic data type module./a1.jsES6 Moduleexportvar=1;setTimeout=>=2,500);./a2.jsCOMMOJS Modulevar=2;module.exports= a2;set

quickly. But after ECMASCript 3 came out of 1999, there were no changes made to the official for a standard. Instead various browser vendors made their own custom extensions to the language, and Web developers were left to try and Support multiple APIs. Even after ECMAScript 5 is published in 2009, it took several years for wide browser support of the new spec, and most de Velopers continued to write code in ECMAScript 3 style, without necessarily being the aware. Around things started to cha

‘], function (jQuery, _) { return factory(jQuery, _); }); } else if (typeof exports === ‘object‘) { // Node.js module.exports = factory(require(‘jquery‘), require(‘underscore‘)); } else { // Browser globals root.Backbone = factory(root.jQuery, root._); }}(this, function (jQuery, _) { var Backbone = {}; // Backbone code that depends on jQuery and _ return Backbone;}));You can see why this is not popular, it is too scary, no one will write, look at it, I just want to curse.

Introduction to the ES6 generator (generators)Let's start with an example:function* quips (name) {Yield "Hello" + name + "!";Yield "I hope you enjoy this introduction to ES6 's translation";if (Name.startswith ("X")) {Yield "Your name" + name + "First letter is X, this is cool!" ";}Yield "We'll see you next time! ";}This code looks much like a function, which we call a generator function, which has a lot in

ECMAScript 6 is the next-generation standard for JavaScript, which was officially released in June 2015. Mozilla will launch JavaScript 2.0 on the basis of this standard.The goal of ES6 is to make JavaScript languages available for writing large, complex applications that become enterprise-level development languages.As a monkey, I also want to try to ES6 what new features, so began the road of learning.Wri

ES6 Iterator (Iterator) and for. of loop usage method learning (Summary), es6for. 1. What is an iterator? The generator concept is available in Java, Python, and other languages, and ES6 is also added to JavaScript. Iterator allows us to use the next method of the Iterator object instead of initializing the set and the index variables. Instead, it returns the value of the next item of the Set, which is more

ECMAScript 6 is the next-generation standard for JavaScript, which was officially released in June 2015. Mozilla will launch JavaScript 2.0 on the basis of this standard.The goal of ES6 is to make JavaScript languages available for writing large, complex applications that become enterprise-level development languages.As a monkey, I also want to try to ES6 what new features, so began the road of learning.Wri

ECMAScript 6 is the next-generation standard for JavaScript, which was officially released in June 2015. Mozilla will launch JavaScript 2.0 on the basis of this standard.The goal of ES6 is to make JavaScript languages available for writing large, complex applications that become enterprise-level development languages.As a monkey, I also want to try to ES6 what new features, so began the road of learning.Wri

) { if (button) { button.prop("disabled", true); } var deferred = $.Deferred(); $.ajax(url, { type: "post", dataType: "json", data: data }).done(function(json) [ if (json.code !== 0) { showError(json.message || "操作发生错误"); deferred.reject(); } else { deferred.resolve(json); } }).fail(function() { showError("服务器错误，请稍后再试"); deferred.reject(); }).always(function() { if (button)