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esnextbin sketch
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>ESNextbin Sketch</title> | |
| <script src="https://unpkg.com/[email protected]/dist/jsx-create-element.js"></script> | |
| </head> | |
| <body> | |
| <div id="app"></div> | |
| </body> | |
| </html> |
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| // https://medium.com/@TheStrazz86/create-a-fully-reactive-ui-framework-with-javascript-proxies-and-virtual-dom-c6fb28253776#.r3vjhpygb | |
| import { create, h, diff, patch } from 'virtual-dom'; | |
| const loggable = (target) => { | |
| const loggingHandler = { | |
| get: function (target,name) { | |
| const value = target[name]; | |
| console.log(`getting ${name}: ${value}`); | |
| return value; | |
| }, | |
| set: function (target,name,value) { | |
| console.log(`setting ${name}: ${value}`); | |
| target[name] = value; | |
| return true; | |
| } | |
| }; | |
| return new Proxy(target,loggingHandler); | |
| }; | |
| const observable = ({target, listener}) => { | |
| let observable; | |
| const set = (target, name, value) => { | |
| target[name] = value; | |
| listener(observable); | |
| return true; | |
| }; | |
| const get = (target, name) => { | |
| return Object.freeze(target[name]); | |
| }; | |
| const handler = { | |
| set, | |
| get | |
| }; | |
| observable = new Proxy(target, handler); | |
| return observable; | |
| }; | |
| let view; | |
| let domNode; | |
| const render = (state) => { | |
| const children = [ | |
| state.list.map(t => h('li', {}, [t])), | |
| h('button', { | |
| onclick() { | |
| state.list = [...state.list, 'more']; | |
| } | |
| }, '+ Add more') | |
| ]; | |
| return h('ul', {}, children); | |
| }; | |
| const updateDom = (state) => { | |
| const newView = render(state); | |
| const patches = diff(view, newView); | |
| view = newView; | |
| domNode = patch(domNode, patches); | |
| }; | |
| const initState = { | |
| list: ['first','second'] | |
| }; | |
| const state = observable({ | |
| target: loggable(initState), | |
| listener: updateDom | |
| }); | |
| view = render(state); | |
| domNode = create(view); | |
| document.body.appendChild(domNode); |
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| { | |
| "name": "esnextbin-sketch", | |
| "version": "0.0.0", | |
| "dependencies": { | |
| "virtual-dom": "2.1.1", | |
| "babel-runtime": "6.18.0" | |
| } | |
| } |
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| 'use strict'; | |
| var _toConsumableArray2 = require('babel-runtime/helpers/toConsumableArray'); | |
| var _toConsumableArray3 = _interopRequireDefault(_toConsumableArray2); | |
| var _freeze = require('babel-runtime/core-js/object/freeze'); | |
| var _freeze2 = _interopRequireDefault(_freeze); | |
| var _virtualDom = require('virtual-dom'); | |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } | |
| var loggable = function loggable(target) { | |
| var loggingHandler = { | |
| get: function get(target, name) { | |
| var value = target[name]; | |
| console.log('getting ' + name + ': ' + value); | |
| return value; | |
| }, | |
| set: function set(target, name, value) { | |
| console.log('setting ' + name + ': ' + value); | |
| target[name] = value; | |
| return true; | |
| } | |
| }; | |
| return new Proxy(target, loggingHandler); | |
| }; // https://medium.com/@TheStrazz86/create-a-fully-reactive-ui-framework-with-javascript-proxies-and-virtual-dom-c6fb28253776#.r3vjhpygb | |
| var observable = function observable(_ref) { | |
| var target = _ref.target; | |
| var listener = _ref.listener; | |
| var observable = void 0; | |
| var set = function set(target, name, value) { | |
| target[name] = value; | |
| listener(observable); | |
| return true; | |
| }; | |
| var get = function get(target, name) { | |
| return (0, _freeze2.default)(target[name]); | |
| }; | |
| var handler = { | |
| set: set, | |
| get: get | |
| }; | |
| observable = new Proxy(target, handler); | |
| return observable; | |
| }; | |
| var view = void 0; | |
| var domNode = void 0; | |
| var render = function render(state) { | |
| var children = [state.list.map(function (t) { | |
| return (0, _virtualDom.h)('li', {}, [t]); | |
| }), (0, _virtualDom.h)('button', { | |
| onclick: function onclick() { | |
| state.list = [].concat((0, _toConsumableArray3.default)(state.list), ['more']); | |
| } | |
| }, '+ Add more')]; | |
| return (0, _virtualDom.h)('ul', {}, children); | |
| }; | |
| var updateDom = function updateDom(state) { | |
| var newView = render(state); | |
| var patches = (0, _virtualDom.diff)(view, newView); | |
| view = newView; | |
| domNode = (0, _virtualDom.patch)(domNode, patches); | |
| }; | |
| var initState = { | |
| list: ['first', 'second'] | |
| }; | |
| var state = observable({ | |
| target: loggable(initState), | |
| listener: updateDom | |
| }); | |
| view = render(state); | |
| domNode = (0, _virtualDom.create)(view); | |
| document.body.appendChild(domNode); |
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