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Aurelia view engine hooks
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| <template> | |
| <require from="./binding-functions"></require> | |
| <h1 if.bind="!promise(myPromise).settled"> | |
| .... | |
| </h1> | |
| <h1 if.bind="promise(myPromise).resolved"> | |
| It resolved! | |
| </h1> | |
| <h1 if.bind="promise(myPromise).rejected"> | |
| It rejected! | |
| </h1> | |
| <h1 if.bind="promise(myPromise).settled"> | |
| value is: <code>${promise(myPromise).value}</code> | |
| </h1> | |
| </template> |
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| export class App { | |
| constructor() { | |
| setTimeout(1000); | |
| this.myPromise = new Promise(resolve => setTimeout(() => resolve('hello world!'), 2000)); | |
| } | |
| } |
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| const key = '__binding_function_state__'; | |
| class BindingFunctions { | |
| toDispose = []; | |
| promise = (promise) => { | |
| if (!promise) { | |
| return; | |
| } | |
| let state = promise[key]; | |
| if (state === undefined) { | |
| state = { | |
| value: undefined, | |
| resolved: false, | |
| rejected: false, | |
| settled: false | |
| }; | |
| Reflect.defineProperty(promise, key, { value: state, enumerable: false }); | |
| promise.then( | |
| value => { | |
| state.value = value; | |
| state.resolved = true; | |
| state.settled = true; | |
| }, | |
| value => { | |
| state.value = value; | |
| state.rejected = true; | |
| state.settled = true; | |
| }); | |
| } | |
| return state; | |
| } | |
| observable = (observable) => { | |
| // todo... | |
| // then push unsubscribe into this.toDispose | |
| } | |
| dispose() { | |
| let i = this.toDispose.length; | |
| while (i--) { | |
| this.toDispose[i](); | |
| } | |
| } | |
| } | |
| export class BindingFunctionViewEngineHooks { | |
| beforeBind(view) { | |
| const bindingFunctions = new BindingFunctions(); | |
| view.bindingFunctions = bindingFunctions; | |
| view.overrideContext.promise = bindingFunctions.promise; | |
| view.overrideContext.observable = bindingFunctions.observable; | |
| } | |
| beforeUnbind(view) { | |
| view.bindingFunctions.dispose(); | |
| view.bindingFunctions = null; | |
| } | |
| }; |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Aurelia</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| </head> | |
| <body aurelia-app> | |
| <h1>Loading...</h1> | |
| <script src="https://jdanyow.github.io/rjs-bundle/node_modules/requirejs/require.js"></script> | |
| <script src="https://jdanyow.github.io/rjs-bundle/config.js"></script> | |
| <script src="https://jdanyow.github.io/rjs-bundle/bundles/aurelia.js"></script> | |
| <script src="https://jdanyow.github.io/rjs-bundle/bundles/babel.js"></script> | |
| <script> | |
| require(['aurelia-bootstrapper']); | |
| </script> | |
| </body> | |
| </html> |
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