响应式
更新状态
模板语法
样式
Ember Octane
/* using: https://github.com/salsify/ember-css-modules */
.title {
color: red;
}
DOM循环
点击事件
DOM引用
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>static const TRAFFIC_LIGHTS = ["红灯", "黄灯", "绿灯"];
<let/lightIndex=0>
<const/light=TRAFFIC_LIGHTS[lightIndex]>
<button onClick() { lightIndex = (lightIndex + 1) % TRAFFIC_LIGHTS.length }>
下一个灯
</button>
<p>现在亮着的是: ${light}</p>
<p>
你应该
<if=light === "红灯">停下</if>
<else if=light === "黄灯">慢行</else>
<else>赶紧走</else>
</p>
生命周期
组件加载时
组件组合
组件Props传参
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>slot插槽内容
上下文
Ember Octane
<UserProfile /><let/user={
id: 1,
username: "abcdefg",
email: "[email protected]",
}>
<const/updateUsername(newUsername) {
user = { ...user, username: newUsername };
}>
<h1>欢迎回来, ${user.username}</h1>
<context={ ...user, updateUsername }>
<UserProfile />
</context>
表单输入
输入框
复选框
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>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>static const colors = [
{ id: 1, text: "红" },
{ id: 2, text: "蓝" },
{ id: 3, text: "绿" },
{ id: 4, text: "灰", isDisabled: true },
];
<let/selectedColorId=2>
<select value:=selectedColorId>
<for|{ id, isDisabled, text }| of=colors>
<option value=id disabled=isDisabled>
${text}
</option>
</for>
</select>
Web应用特性
渲染应用
Ember Octane
缺少代码片段 帮助我们改进 Component Party 
fetch获取数据
Ember Octane
{{#let (this.fetchUsers) as |request|}}
{{#if request.isLoading}}
<p>正在获取用户信息……</p>
{{else if request.error}}
<p>获取用户信息出错</p>
{{else}}
<ul>
{{#each request.users as |user|}}
<li>
<img src={{user.picture.thumbnail}} alt="user" />
<p>{{user.name.first}} {{user.name.last}}</p>
</li>
{{/each}}
</ul>
{{/if}}
{{/let}}<try>
<await|{ results: users }|=fetch("https://randomuser.me/api/?results=3").then(res => res.json())>
<ul>
<for|{ picture, name }| of=users>
<li>
<img src=picture.thumbnail alt="user">
<p>${name.first} ${name.last}</p>
</li>
</for>
</ul>
</await>
<@placeholder>
<p>正在获取用户信息……</p>
</@placeholder>
<@catch|error|>
<p>获取用户信息出错</p>
</@catch>
</try>