Reactivity
Declare state
Update state
Templating
Styling
Loop
Event click
Conditional
<div
x-data="{
TRAFFIC_LIGHTS: ['red', 'orange', 'green'],
lightIndex: 0,
get light() { return this.TRAFFIC_LIGHTS[this.lightIndex] },
nextLight() {
this.lightIndex = (this.lightIndex + 1) % this.TRAFFIC_LIGHTS.length;
}
}"
>
<button x-on:click="nextLight">Next light</button>
<p>Light is: <span x-text="light"></span></p>
<p>
You must
<span x-show="light === 'red'">STOP</span>
<span x-show="light === 'orange'">SLOW DOWN</span>
<span x-show="light === 'green'">GO</span>
</p>
</div>
Aurelia 2
<button click.trigger="nextLight()">Next light</button>
<p>Light is: ${light}</p>
<p switch.bind="light">
You must
<span case="red">STOP</span>
<span case="orange">SLOW DOWN</span>
<span case="green">GO</span>
</p>
Lifecycle
On mount
On unmount
Component composition
Props
<!--Alpine JS suggests using a server-side templating engine or another frontend framework in conjunction with Alpine to do this-->
<div
x-data="{
name: 'John',
age: 20,
favouriteColors: ['green', 'blue', 'red'],
isAvailable: true
}"
>
<p>My name is <span x-text="John"></span></p>
<p>My age is <span x-text="age"></span></p>
<p>
My favourite colors are <span x-text="favouriteColors.join(', ')"></span>
</p>
<p>I am <span x-text="isAvailable ? 'available' : 'not available'"></span></p>
</div>
Aurelia 2
<user-profile
name.bind
age.bind
favourite-colors.bind="colors"
is-available.bind="available"
></user-profile>
Emit to parent
<div
x-data="{ isHappy: true }"
x-on:yes="isHappy = true"
x-on:no="isHappy = false"
>
<p>Are you happy?</p>
<div>
<button x-on:click="$dispatch('yes')">YES</button>
<button x-on:click="$dispatch('no')">NO</button>
</div>
<p style="font-size: 50px" x-text="isHappy ? '😀' : '😥'"></p>
</div>
Aurelia 2
<p>Can I come ?</p>
<answer-button action-handler.bind="handleAnswer"></answer-button>
<p style="font-size: 50px">${isHappy ? "😀" : "😥"}</p>
Slot
<!--Alpine JS suggests using a server-side templating engine or another frontend framework in conjunction with Alpine to do this-->
<button
x-data
x-text="'Click me!'"
style="
background: rgba(0, 0, 0, 0.4);
color: #fff;
padding: 10px 20px;
font-size: 30px;
border: 2px solid #fff;
margin: 8px;
transform: scale(0.9);
box-shadow: 4px 4px rgba(0, 0, 0, 0.4);
transition: transform 0.2s cubic-bezier(0.34, 1.65, 0.88, 0.925) 0s;
outline: 0;
"
>
<span>No content found</span>
</button>
Aurelia 2
<funny-button>Click me !</funny-button>
Slot fallback
<!--Alpine JS suggests using a server-side templating engine or another frontend framework in conjunction with Alpine to do this-->
<button
x-data
style="
background: rgba(0, 0, 0, 0.4);
color: #fff;
padding: 10px 20px;
font-size: 30px;
border: 2px solid #fff;
margin: 8px;
transform: scale(0.9);
box-shadow: 4px 4px rgba(0, 0, 0, 0.4);
transition: transform 0.2s cubic-bezier(0.34, 1.65, 0.88, 0.925) 0s;
outline: 0;
"
>
<span>No content found</span>
</button>
<button
x-data
x-text="'I got content!'"
style="
background: rgba(0, 0, 0, 0.4);
color: #fff;
padding: 10px 20px;
font-size: 30px;
border: 2px solid #fff;
margin: 8px;
transform: scale(0.9);
box-shadow: 4px 4px rgba(0, 0, 0, 0.4);
transition: transform 0.2s cubic-bezier(0.34, 1.65, 0.88, 0.925) 0s;
outline: 0;
"
>
<span>No content found</span>
</button>
Aurelia 2
<funny-button></funny-button>
<funny-button>Click me !</funny-button>
Context
Alpine
Missing snippet Help us to improve Component Party 
Aurelia 2
<h1>Welcome back, {{ user.username }}</h1>
<user-profile />
Form input
Input text
Checkbox
<div x-data="{ isAvailable: true }">
<input id="is-available" x-model="isAvailable" type="checkbox" />
<label for="is-available">Is available</label>
</div>
Aurelia 2
<input id="is-available" type="checkbox" checked.bind="isAvailable" />
<label for="is-available">Is available</label>: ${isAvailable}
Radio
<div x-data="{ picked: 'red' }">
<div>Picked: <span x-text="picked"></span></div>
<input id="blue-pill" x-model="picked" type="radio" value="blue" />
<label for="blue-pill">Blue pill</label>
<input id="red-pill" x-model="picked" type="radio" value="red" />
<label for="red-pill">Red pill</label>
</div>
Aurelia 2
<div>Picked: ${picked}</div>
<input id="blue-pill" checked.bind="picked" type="radio" value="blue" />
<label for="blue-pill">Blue pill</label>
<input id="red-pill" checked.bind="picked" type="radio" value="red" />
<label for="red-pill">Red pill</label>
Select
<div
x-data="{
selectedColorId: 2,
colors: [
{ id: 1, text: 'red' },
{ id: 2, text: 'blue' },
{ id: 3, text: 'green' },
{ id: 4, text: 'gray', isDisabled: true }
]
}"
>
<select x-model.number="selectedColorId">
<template x-for="color in colors" x-bind:key="color.id">
<option
x-text="color.text"
x-bind:value="color.id"
x-bind:disabled="!!color.isDisabled"
x-bind:selected="color.id === selectedColorId"
></option>
</template>
</select>
</div>
Aurelia 2
<select value.bind="selectedColorId">
<option value="">Select A Color</option>
<option
repeat.for="color of colors"
value.bind="color.id"
disabled.bind="color.isDisabled"
>
${color.text}
</option>
</select>
Webapp features
Render app
Fetch data
<div
x-data="
function fetchUsers() {
return {
users: null,
isLoading: false,
error: null,
async init() {
this.isLoading = true;
try {
this.users = (await (await fetch('https://randomuser.me/api/?results=3')).json()).results;
} catch (err) {
this.users = [];
this.error = err
}
this.isLoading = false;
},
};
}
"
>
<template x-if="isLoading">
<p>Loading...</p>
</template>
<template x-if="error">
<p>Error fetching users</p>
</template>
<template x-if="!error">
<ul>
<template x-for="user in users">
<li>
<img
:src="user.picture.thumbnail"
:alt="`picture of ${user.name.first} ${user.name.last}`"
/>
<p x-text="`${user.name.first} ${user.name.last}`"></p>
</li>
</template>
</ul>
</template>
</div>
Aurelia 2
<template promise.bind="useFetchUsers.fetchData()">
<p pending>Fetching users...</p>
<p catch>An error ocurred while fetching users</p>
<ul then.from-view="users">
<li repeat.for="user of users">
<img src.bind="user.picture.thumbnail" alt="user" />
<p>${ user.name.first } ${ user.name.last }</p>
</li>
</ul>
</template>