响应式
声明状态
Ember Octane
<h1>你好 {{this.name}}</h1>
Aurelia 2
<h1>你好 ${name}</h1>
更新状态
Ember Octane
<h1>你好 {{this.name}}</h1>
Aurelia 2
<h1>你好 ${name}</h1>
计算属性
Ember Octane
<div>{{this.doubleCount}}</div>
Aurelia 2
<div>${doubleCount}</div>
模板语法
最简模板
Ember Octane
<h1>你好,世界</h1>
Aurelia 2
<h1>你好,世界</h1>
样式
Ember Octane
/* using: https://github.com/salsify/ember-css-modules */
.title {
color: red;
}
Aurelia 2
.title {
color: red;
}
DOM循环
Ember Octane
<ul>
{{#each (array "红" "绿" "蓝") as |color|}}
<li>{{color}}</li>
{{/each}}
</ul>
Aurelia 2
<ul>
<li repeat.for="color of colors">${color}</li>
</ul>
点击事件
Ember Octane
<p>计数器: {{this.count}}</p>
<button {{on "click" this.incrementCount}}>+1</button>
Aurelia 2
<p>计数器: ${count}</p>
<button click.trigger="incrementCount">+1</button>
DOM引用
Ember Octane
<input {{this.autofocus}} />
Aurelia 2
<input ref="inputElement" />
条件渲染
Ember Octane
<button {{on "click" this.nextLight}}>下一个灯</button>
<p>现在亮着的是: {{this.light}}</p>
<p>
你应该
{{#if (eq this.light "红灯")}}
停下
{{else if (eq this.light "黄灯")}}
慢行
{{else if (eq this.light "绿灯")}}
赶紧走
{{/if}}
</p>
Aurelia 2
<button click.trigger="nextLight()">下一个灯</button>
<p>现在亮着的是: ${light}</p>
<p switch.bind="light">
你应该
<span case="红灯">停下</span>
<span case="黄灯">慢行</span>
<span case="绿灯">赶紧走</span>
</p>
生命周期
组件加载时
Ember Octane
<p>页面标题: {{(this.pageTitle)}}</p>
Aurelia 2
<p>页面标题: ${pageTitle}</p>
组件卸载时
Ember Octane
<p>当前时间: {{this.time}}</p>
Aurelia 2
<p>当前时间: ${time}</p>
组件组合
组件Props传参
Ember Octane
<UserProfile
@name="张三"
@age={{20}}
@favouriteColors={{array "green" "blue" "red"}}
@isAvailable={{true}}
/>
Aurelia 2
<user-profile
name.bind
age.bind
favourite-colors.bind="colors"
is-available.bind="available"
></user-profile>
向父组件emit事件
Ember Octane
<p>你快乐吗?</p>
<AnswerButton @onYes={{this.handleYes}} @onNo={{this.handleNo}} />
<p style="font-size: 50px;">{{if this.isHappy "😀" "😥"}}</p>
Aurelia 2
<p>你快乐吗?</p>
<answer-button action-handler.bind="handleAnswer"></answer-button>
<p style="font-size: 50px">${isHappy ? "😀" : "😥"}</p>
slot插槽
Ember Octane
<FunnyButton> 点我! </FunnyButton>
Aurelia 2
<funny-button>点我!</funny-button>
slot插槽内容
Ember Octane
<FunnyButton />
<FunnyButton>这是传到slot的内容!</FunnyButton>
Aurelia 2
<funny-button></funny-button>
<funny-button>这是传到slot的内容!</funny-button>
上下文
Ember Octane
<UserProfile />
Aurelia 2
<h1>欢迎回来, {{ user.username }}</h1>
<user-profile />
表单输入
输入框
Ember Octane
<p>{{this.text}}</p>
<input value={{this.text}} {{on "input" this.handleInput}} />
Aurelia 2
<p>${text}</p>
<input value.bind />
复选框
Ember Octane
<input
id="is-available"
type="checkbox"
checked={{this.isAvailable}}
{{on "change" this.handleChange}}
/>
<label for="is-available">这是一个checkbox</label>
Aurelia 2
<input id="is-available" type="checkbox" checked.bind="isAvailable" />
<label for="is-available">这是一个checkbox</label>: ${isAvailable}
单选框
Ember Octane
<div>你选择了: {{this.picked}}</div>
<input
id="blue-pill"
type="radio"
value="blue"
checked={{eq this.picked "blue"}}
{{on "change" this.handleChange}}
/>
<label htmlFor="blue-pill">蓝色</label>
<input
id="red-pill"
type="radio"
value="red"
checked={{eq this.picked "red"}}
{{on "change" this.handleChange}}
/>
<label htmlFor="red-pill">红色</label>
Aurelia 2
<div>你选择了: ${picked}</div>
<input id="blue-pill" checked.bind="picked" type="radio" value="blue" />
<label for="blue-pill">蓝色</label>
<input id="red-pill" checked.bind="picked" type="radio" value="red" />
<label for="red-pill">红色</label>
选择器
Ember Octane
<select {{on "change" this.select}}>
{{#each this.colors as |color|}}
<option
value={{color.id}}
disabled={{color.isDisabled}}
selected={{eq color.id this.selectedColorId}}
>
{{color.text}}
</option>
{{/each}}
</select>
Aurelia 2
<select value.bind="selectedColorId">
<option value="">选择一个颜色</option>
<option
repeat.for="color of colors"
value.bind="color.id"
disabled.bind="color.isDisabled"
>
${color.text}
</option>
</select>
Web应用特性
渲染应用
Ember Octane
缺少代码片段 帮助我们改进 Component Party 
Aurelia 2
<!doctype html>
<html>
<head>
<script type="module" src="./main.ts"></script>
</head>
<body>
<app></app>
</body>
</html>
fetch获取数据
Ember Octane
{{#let (this.fetchUsers) as |request|}}
{{#if request.isLoading}}
<p>正在获取用户信息……</p>
{{else if request.error}}
<p>获取用户信息出错</p>
{{else}}
<ul>
{{#each request.users as |user|}}
<li>
<img src={{user.picture.thumbnail}} alt="user" />
<p>{{user.name.first}} {{user.name.last}}</p>
</li>
{{/each}}
</ul>
{{/if}}
{{/let}}
Aurelia 2
<template promise.bind="useFetchUsers.fetchData()">
<p pending>正在获取用户信息……</p>
<p catch>获取用户信息出错</p>
<ul then.from-view="users">
<li repeat.for="user of users">
<img src.bind="user.picture.thumbnail" alt="user" />
<p>${ user.name.first } ${ user.name.last }</p>
</li>
</ul>
</template>