react pwa

= Db.transaction (' People '); varPeoplestore = Tx.objectstore (' People ')); returnPeoplestore. GetAll (); }). Then (function(People) {console.table (people);}); Group by:To does gourp by we need to create INDEX: Import IDB from ' IDB '; varDbpromise = Idb.open (' test-db ', 3,function(upgradedb) {Switch(upgradedb.oldversion) { Case0: //Keyval Store is already created at version 1 varKeyvalstore = Upgradedb.createobjectstore (' Keyval ')); Keyvalstore.put ("Wo

Most of the analysis results show that some tasks of the project have unreasonable logic in allocation and work hours, leading to exceptions in the webpart. Usually, the PWA System maintenance staff will be crazy at this time, because no one changes the settings, the server services are normal, and this logical error occurs inadvertently under the project manager. I felt that the last second was still good, and suddenly I got down. (For administrators

')); Peoplestore.put ({name:"John",//name is the keyAge:23, Favoriteanimal:' Cat ' }); Peoplestore.put ({name:"Joe",//name is the keyAge:21, Favoriteanimal:' Cat ' }); Peoplestore.put ({name:"Jie",//name is the keyAge:22, Favoriteanimal:' Dog ' }); Peoplestore.put ({name:"Jay",//name is the keyAge:24, Favoriteanimal:' Dog ' }); returnTx.complete;}). Then (function() {Console.log ("People is added");}); Dbpromise.then (function(db) {vartx = Db.transaction (' People ', ' ReadWrite ');

(' Updatefound ',function(){ //reg.installing is changed })})Api:linkFor the service worker itself:var sw =// ... logs "Installing"/ /// "Installed" // "activating"/ /" avvtivated"// "redundant" Sw.addeventlistener (function() { // Sw.state has changed })Aslo about:Naviagetor.serviceWorker.controller"Navigator.serviceWorker.controller" refer to the service worker, that controls the page.So if there was no controller, then it means the data was loading from network:if (! Naviga

the root scope, so it's available to all the Child components.2. Our service worker file:// Sw.js Self.addeventlistener ('fetch', function (event) { Console.log (event. request);});Once you fetch the page seond time (first time service work do cache stuff), second time you'll see in the console, the Re is lots of requests log out. Of course, service worker has other event listeners:Self.addeventlistener ('Install', Function (Event) { // ..}); Self.addeventlistener ('Activate', Function

Mainly about Material design (effects/colors/flashy stuff) Components (web Components/polymer) Offline/notifications (Service worker/idb/firebase) Progressive Web App: HTTPS Add to Home screen Splash screen Service worker notifications, BG Sync Offline Service Worker: Send Reminders Sessiong starting/updated/rate Fully offline experience Offline analytices Performance To

Link to CodelabIn this codelab, we'll retrace those steps but this time we'll use a tool called Sw-precache to add offline functionality With only six lines of code. It's never been easier to add service worker support to an existing app, and we'll show you what in this codelab.Learning: What's the Sw-precache tool is and how it can help you being more productive How to add a basic service worker to an existing project using Sw-precache Install:git clone https://gith

) {returnResponse | |fetch (event.request); }) );});The Servephoto ():We want to make sure-things: We don ' t care the photo size, 800px,200px or 40px Because respond object can be is only access once, so we need Clone () the original one and use clone one for the CAHCE, retur n the original one to the browser. functionServephoto (Request) {varStorageurl = Request.url.replace (/-\d+px\.jpg$/, "); returnCaches.open (Contentimgscache). Then (function(cache) {returnCache.match (S

the create the cache, but it was not a useful until we use the cache.To use the cache, we can do:Self.addeventlistener (' Install ',function(event) {varUrlstocache = [ ‘/‘, ' Js/main.js ', ' Css/main.css ', ' Imgs/icon.png ', ' Https://fonts.gstatic.com/s/roboto/v15/2UX7WLTfW3W8TclTUvlFyQ.woff ', ' Https://fonts.gstatic.com/s/roboto/v15/d-6IYplOFocCacKzxwXSOD8E0i7KZn-EPnyo3HZu7kw.woff ' ]; Event.waituntil (//Todo:open A cache named ' Wittr-static-v1 ' //ADD cache The URLs

Label:Use the library indexeddb-promised. Create a database and Stroe: Import IDB from ' IDB '; // Open (db_name, version, CB) var function (upgradedb) { var// CREATE TABLE //put (value, key ) keyvalstore.put (' World ', ' Hello ') ; Notice put () function take value frist then key. Read the key in Stroe: // read "Hello" in "Keyval" Dbpromise.then (function (db) { var// Open a transaction var// read the store return// Get value by key }). Then (function (val)

When we save items to indexdb, we need to think about clean the items or keep those in a short list.Indexcontroller.prototype._onsocketmessage =function (data) {varMessages =json.parse (data); This. _dbpromise.then (function (db) {if(!DB)return; vartx = Db.transaction ('Wittrs','ReadWrite'); varstore = Tx.objectstore ('Wittrs'); Messages.foreach (function (message) {store.put (message); }); //Todo:keep The newest, entries in ' Wittrs ',//But delete the rest. // //hint:you can use. open

Stepped on a pit and a hole, used to be their own manually created react development environment, to install Webpack, Babel, React, react-dom components, but also need to modify, add a variety of configuration files.When the new worry about the environment, suddenly found react-scripts. To build a project try:First ste

Create-react-app is from Facebook, which allows us to quickly build a react development environment without configuration.Create-react-app automatically created projects are based on Webpack + ES6The following commands are executed:NPM Install create-react-app-g // Global Installation Create-

Only the students who are concerned with the problem in parentheses can jump directly to the Blue Word section. (the title is a bit big, in fact only one question is discussed)two events bound on the React component, after a conflict, prevent event collisions with e.stoppropagation (), which preventsbubbling, without problems. Today is a hole in the react event, the need can be simplified as follows: Cli

React Native mobile development practices-2-how to debug the React Native project-2-react In actual development, there is also an important factor that affects development efficiency: debugging. The use of Enable Live Debugger is introduced in Section 1.4.3. This section describes another important debugging option: Debug JSRemotely. (1) Shake the device or use t

Detailed explanation of React Exception Handling and react Exception Handling in React 16 Exception Handling in React 16 Exception Handling In React 15.x and earlier versions, exceptions in the component may affect the internal status of

The so-called beginning of everything is difficult, the purpose of this article is to explore react students, the establishment of the first basic react application.The Create React app is one of the official Facebook scaffolding tools to quickly build a new React single page app that can help you configure your develo

1, Create-react-app is what.To be a react project, it is difficult for beginners to build their development environment. So, Facebook specifically made the Create-react-app command for building React project development environment. The Create-react-app is created based on

Elements, components, instances and nodes in React and react The React in-depth series provides an in-depth explanation of key concepts, features, and patterns in React, aiming to help you understand React and use React more flexi

Original link: http://mp.weixin.qq.com/s?__biz=MzA5Njc3Njk5NA==mid=2650528748idx=1sn= 4d3093e963ce76c642eb0c5d9a97625b#rdThe origins of reactReact comes from Facebook, yes, the website that you've heard of but can't open. Facebook developers were developing an ad system because they were not satisfied with the current MVC framework, so they wrote a UI framework and react. Later because it feels really good to use, so in the 2013 month open source thi