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Aurelia "let" element
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| <template> | |
| <require from="let"></require> | |
| <let foo="bar + message"></let> | |
| <input value.bind='bar' /> | |
| <input value.bind='foo' /> | |
| ${message} | |
| </template> |
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| export class App { | |
| message = 'hello world'; | |
| bar = '5' | |
| constructor() { | |
| window.app = this; | |
| // setInterval(() => this.bar = !this.bar, 1000); | |
| } | |
| } |
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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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| import { | |
| customElement, | |
| noView, | |
| BindingEngine, | |
| BindingExpression, | |
| bindingMode, | |
| TargetInstruction, | |
| inject | |
| } from 'aurelia-framework'; | |
| var LookupFunctions = { | |
| bindingBehaviors: function bindingBehaviors(name) { | |
| return null; | |
| }, | |
| valueConverters: function valueConverters(name) { | |
| return null; | |
| } | |
| }; | |
| @customElement('let') | |
| @noView() | |
| @inject(Element, BindingEngine, TargetInstruction) | |
| export class LetElement { | |
| instruction = null; | |
| bindings = null; | |
| constructor(element, bindingEngine, instruction) { | |
| console.clear(); | |
| this.element = element; | |
| this.bindingEngine = bindingEngine; | |
| this.instruction = instruction; | |
| } | |
| bind(bindingContext, overrideContext) { | |
| let bindings = this.bindings = []; | |
| let attrs = this.element.attributes; | |
| let i = attrs.length; | |
| let attr; | |
| let name; | |
| let bindingExpression; | |
| let binding; | |
| while (i--) { | |
| attr = attrs[i]; | |
| name = attr.name; | |
| if (name === 'au-target-id' || name === 'class') continue; | |
| bindingExpression = this.bindingEngine.createBindingExpression(name, `${attr.name} = ${attr.value}`); | |
| binding = bindingExpression.createBinding(overrideContext); | |
| binding.bind({ bindingContext, overrideContext }); | |
| bindings.push(binding); | |
| } | |
| } | |
| unbind() { | |
| let i = this.bindings.length; | |
| while (i--) { | |
| this.bindings[i].unbind(); | |
| } | |
| this.bindings = null; | |
| } | |
| } |
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