TodoMVC with server-side rendering
Live demo at todomvc-express.herokuapp.com/ - might be asleep, wait 10 seconds. Does not permanently store todos; they disappear when the dyno goes to sleep.
Complete server-side rendering for TodoMVC using ExpressJS server and virtual-dom.
In fact, NO client side JavaScript is allowed using Content Security Policy setting in the page "meta" tag (view page source). You can disable JavaScript in your browser and the page will still work just fine.
Any new todo, or click leads to the form submission and new page rendering.
You can clone this repo and start the server locally
npm start
The open localhost:3000 to play with the application. Local data is saved in todos.json. The Express server itself is defined in file src/app.js that you can reuse from other environments
To run the server and the Cypress test
npm run devFind the tests in the cypress/integration folder. There are UI and API tests.
I have written a couple of modules that help with TodoMVC applications.
- virtual-todos - generates Virtual Dom from todos
- fake-todos to generate fake todo items
- todomvc-model is the model that keeps todo items and responds to outside events
- instant-vdom-todo - instant web app using ServiceWorker
The returned Express app is also an event emitter. Every data update it emits the updated todo list.
const app = require('todomvc-express')
app.on('todos', function (todos) {
console.log('server has new %d todos', todos.length)
// each todo object has {what, done, id} like this
/*
{ what: 'new todo',
done: false,
id: '43e63255-5582-4f6f-85c2-dc2e85e44ffb' }
*/
})I have added a level of in-memory caching, see src/cache.js. Instead of calling db methods directly, like db.loadTodos() the app code goes through the cache methods, that have same API as db. To better show caching, I slowed down the db.loadTodos to take 1 second.
Author: Gleb Bahmutov © 2016
License: MIT - do anything with the code, but don't blame me if it does not work.
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Support: if you find any problems with this module, email / tweet / open issue on Github
Copyright (c) 2016 Gleb Bahmutov
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.