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Binding Behavior binding
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| <template> | |
| <require from="./lookup"></require> | |
| <h1>${message}</h1> | |
| <div repeat.for="item of items"> | |
| Index: $index | Id: ${item.id} | ${item.value & lookup:item.type} | |
| </div> | |
| <button click.delegate="addItem()">Add item ${items.length}</button> | |
| </template> |
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| export class App { | |
| message = 'Hello World'; | |
| items = []; | |
| addItem() { | |
| const items = this.items.sort((a, b) => Math.random() < Math.random() ? 1 : -1) | |
| items.push({ | |
| id: items.length, | |
| value: 'val ' + items.length, | |
| type: 'type ' + items.length | |
| }); | |
| this.items = items; | |
| } | |
| } |
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| import {inject} from 'aurelia-dependency-injection' | |
| export class Action1Dependency {} | |
| export class Action2Dependency {} | |
| export class ActionBase{ | |
| } | |
| @inject(Action1Dependency) | |
| export class Action1 extends ActionBase{ | |
| constructor(dep){ | |
| super(); | |
| this.dep = dep; | |
| } | |
| } | |
| @inject(Action2Dependency) | |
| export class Action2 extends ActionBase{ | |
| constructor(dep){ | |
| super(); | |
| this.dep = dep; | |
| } | |
| } |
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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://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/jspm_packages/system.js"></script> | |
| <script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/config.js"></script> | |
| <script> | |
| System.import('aurelia-bootstrapper'); | |
| </script> | |
| </body> | |
| </html> |
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| export class LookupBindingBehavior { | |
| bind(binding, scope, ...args) { | |
| binding.originalUpdateTarget = binding.updateTarget.bind(binding); | |
| binding.updateTarget = binding.updateTarget = value => { | |
| const evaluatedArgs = binding.sourceExpression.args.map((arg: AccessMember) => | |
| arg.evaluate(scope) | |
| ); | |
| this.update(binding.originalUpdateTarget, ...evaluatedArgs, value); | |
| }; | |
| } | |
| unbind(binding) { | |
| binding.updateTarget = binding.originUpdateTarget; | |
| delete binding.originUpdateTarget; | |
| } | |
| update(updateTarget, type, value) { | |
| updateTarget(`Value: ${value} | Type: ${type}`); | |
| } | |
| } |
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