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Aurelia Template Behaviour with repeat-items-changed
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| <template> | |
| <require from="./attaching-span"></require> | |
| <h1>${message}</h1> | |
| <button click.delegate="addNumber('before')">Add number before</button> | |
| <button click.delegate="addNumber('after')">Add number after</button> | |
| <button click.delegate="addMany('before')">Add many before</button> | |
| <button click.delegate="addMany('after')">Add many after</button> | |
| <div> | |
| <span repeat.for="number of numbers" repeat-items-changed.bind="repeatRendered">${number}</span> | |
| </div> | |
| </template> |
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| import {inject, ObserverLocator, TaskQueue} from 'aurelia-framework'; | |
| import {Repeat} from 'aurelia-templating-resources' | |
| @inject(ObserverLocator, TaskQueue) | |
| export class App { | |
| constructor(observerLocator, taskQueue) { | |
| this.message = 'Hello World!'; | |
| this.numbers = []; | |
| } | |
| repeatRendered() { | |
| alert('rendered!') | |
| } | |
| addNumber(location) { | |
| const newNumber = this.numbers.length; | |
| if(location == 'before') { | |
| this.numbers.unshift(newNumber); | |
| } else { | |
| this.numbers.push(newNumber); | |
| } | |
| } | |
| addMany(location) { | |
| const newNumber = this.numbers.length; | |
| if(location == 'before') { | |
| this.numbers.unshift(newNumber); | |
| this.numbers.unshift(newNumber); | |
| this.numbers.unshift(newNumber); | |
| this.numbers.unshift(newNumber); | |
| } else { | |
| this.numbers.push(newNumber); | |
| this.numbers.push(newNumber); | |
| this.numbers.push(newNumber); | |
| this.numbers.push(newNumber); | |
| } | |
| } | |
| } | |
| Repeat.prototype._captureAndRemoveItemsChangedBinding = function() { | |
| if (this.viewFactory.viewFactory) { | |
| const instructions = this.viewFactory.viewFactory.instructions; | |
| const instructionIds = Object.keys(instructions); | |
| for (let i = 0; i < instructionIds.length; i++) { | |
| const expressions = instructions[instructionIds[i]].expressions; | |
| if (expressions) { | |
| for (let ii = 0; i < expressions.length; i++) { | |
| if (expressions[ii].targetProperty === 'repeat-items-changed') { | |
| const binding = expressions[ii]; | |
| expressions.splice(ii, 1); | |
| return binding; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| Repeat.prototype.onItemsChanged = function() { | |
| return this.onItemsChangedBinding ? this.onItemsChangedBinding.sourceExpression.evaluate(this.scope, this.onItemsChangedBinding.lookupFunctions) : null; | |
| } | |
| Repeat.prototype.callOnItemsChanged = function() { | |
| const onItemsChanged = this.onItemsChanged(); | |
| if (onItemsChanged) { | |
| this.observerLocator.taskQueue.queueTask(() => { | |
| onItemsChanged(); | |
| }); | |
| } | |
| } | |
| const itemsChanged = Repeat.prototype.itemsChanged; | |
| Repeat.prototype.itemsChanged = function() { | |
| itemsChanged.call(this); | |
| this.callOnItemsChanged(); | |
| } | |
| const handleCollectionMutated = Repeat.prototype.handleCollectionMutated; | |
| Repeat.prototype.handleCollectionMutated = function(collection, changes) { | |
| handleCollectionMutated.call(this, collection, changes); | |
| this.callOnItemsChanged(); | |
| } | |
| // TODO: handleInnerCollectionMutated | |
| const bind = Repeat.prototype.bind; | |
| Repeat.prototype.bind = function(bindingContext, overrideContext) { | |
| this.scope = { bindingContext, overrideContext }; | |
| this.onItemsChangedBinding = this._captureAndRemoveItemsChangedBinding(); | |
| bind.apply(this, arguments); | |
| } | |
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| import {inlineView, customElement} from 'aurelia-framework' | |
| @customElement('attaching-span') | |
| @inlineView(`<template><content></content></template>`) | |
| export class AttachingSpan { | |
| attached() { | |
| // you can notify that the element is attached, but the method has to be present | |
| } | |
| } |
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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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