typescript to es6

How to use Set, WeakSet, es6setweakset in ES6 ES6 provides two new data structures: Set and WeakSet. Set is similar to an array, but the values of member variables are unique and there are no repeated values. WeakSet is also a set of non-repeated values, but can only be used to store objects. 1. Set usage (1) Set itself provides a constructor to generate a Set data structure. var s = new Set();[2,2,2,5,8,16

ES6 is extended for numeric types (number):1. A new notation for binary and octalES6 provides a new notation for binary and octal values, expressed in 0b (or 0B) and 0o (or 0o) respectively. For example:0b111110111 = = = 503 // true= = = 503 //trueSince ES5, in strict mode, octal is no longer allowed to use the prefix zero, so it is further clarified in the ES6 and is represented by 0o.If you want to con

Application code parsing of es6 in react and es6react code parsing Whether React or React-native, facebook officially recommends ES6 syntax. If ES6 is not used in projects, some problems may occur during the conversion, if there is no time for the system to learn ES6, it is enough to pay attention to some common writin

abandoned because it was too aggressive, Adobe's ActionScript 3.0 was the only implementation of ECMAScript Edition 4 (Flash almost unified the Web) By the year 2012, things have suddenly started to change. Everyone started pushing to stop support for older versions of Internet Explorer, and writing code in ECMAScript 5 (ES5) style became more feasible. At the same time, a new ECMAScript specification is starting to start. By this time, people began to become accustomed to the version of t

I am very excited about the new features discussed today, because this feature is the most magical feature of ES6. What does this "magic" mean? For beginners, this feature is completely different from the previous JS, and even some obscure. In a sense, it completely changes the normal behavior of the language, which is not "magic". Not only that, this feature simplifies the program code and changes the complex "callback stack" to the form of a strai

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

In view of the recent development of projects with the VUEJS framework, many of them involve the ES6 grammar which is not well understood in order to read the book carefully.Address: http://es6.ruanyifeng.com/#README　　Chapter One: Let, const commands, and block-level scopesES6 adds a declarative keyword for both the Let and the const variables, which greatly reinforces the JS variable's reasonableness and f

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.

A word summary: using Webstorm's own file Watcher function +babel to achieve automatic conversion ECMAScript 6 code for ES5 code1.Create a new empty Project, and then create a new main.js in the SRC directory;This step is not necessary, just get started. It will be much less disruptive to start your own configuration from an empty project.2.Enter settings to change JavaScript language version to ECMAScript 6;3.And then. Write a section of ES6 code'Use

ES6 introduced a lot of new syntax features, but want to do in the existing browser environment, need to ES6 code to ES5 code, there are many transcoding babel,traceur, etc., after reference, use Traceur and gulp to build ES6 environment, start my ES6 .Start installationFirst make sure the Nodejs is installed on your c

Recently studying ES6 in the ES6 series with Nanyi, some errors were found in the Let and Const commands chapter, which listsFirst, let does not exist the variable promotion assumes that there is no variable promotion, then in the Ruan Feng article this code code is correctfunction do_something () { console.log (foo);//Referenceerror let foo = 2;}The program will report referenceerror errors, while the ac

During this time, I learned a little bit about ES6 's new specification, and then, on a whim, wanted to try the code written in ES6 to run in the browser.Say to do, first of all, the implementation of my steps (did not think there is a pit!) ） Translate the ES6 code into ES5; HTML files are introduced into the ES5 after translation; Then run in t

Explore ES6 Proxy in detail, explore es6proxy Preface In ES6, the Proxy constructor is an accessible global object. You can use it to collect information about request operations between objects and the actions of various operation objects, and return anything you want to do. Features such as Arrow functions, array deconstruct, and rest parameters in ES6 have bee

1.webstorm ES6 syntax error, Solution:Open Settings = Languages frameworks = JavascriptChange Javascript Language version to ECMAScript 6In doing so all the. js files Es6 no longer have an error, but the ES6 syntax in the. vue file continues to error.2. ES6 syntax error in. vue file(1) Open Settings = File Types Find