Reactivity
Declare state
Update state
Templating
Minimal template
Styling
Loop
Event click
Ember Octane
<p>Counter: {{this.count}}</p>
<button {{on "click" this.incrementCount}}>+1</button>Dom ref
Conditional
Ember Octane
<button {{on "click" this.nextLight}}>Next light</button>
<p>Light is: {{this.light}}</p>
<p>
You must
{{#if (eq this.light "red")}}
STOP
{{else if (eq this.light "orange")}}
SLOW DOWN
{{else if (eq this.light "green")}}
GO
{{/if}}
</p>import { track } from "ripple";
const TRAFFIC_LIGHTS = ["red", "orange", "green"];
export default function TrafficLight() {
let &[lightIndex] = track(0);
let &[light] = track(() => TRAFFIC_LIGHTS[lightIndex]);
function nextLight() {
lightIndex = (lightIndex + 1) % TRAFFIC_LIGHTS.length;
}
return <>
<button onClick={nextLight}>"Next light"</button>
<p>"Light is "{light}</p>
<p>
"You must "
if (light === "red") {
<span>"STOP"</span>
} else if (light === "orange") {
<span>"SLOW DOWN"</span>
} else if (light === "green") {
<span>"GO"</span>
}
</p>
</>;
}
Lifecycle
On mount
On unmount
Ember Octane
<p>Current time: {{this.time}}</p>import { effect, track } from "ripple";
export default function Time() {
let &[time] = track(new Date().toLocaleTimeString());
effect(() => {
const timer = setInterval(() => {
time = new Date().toLocaleTimeString();
}, 1000);
return () => clearInterval(timer);
});
return <h1>"Current time: "{time}</h1>;
}
Component composition
Props
Ember Octane
<UserProfile
@name="John"
@age={{20}}
@favouriteColors={{array "green" "blue" "red"}}
@isAvailable={{true}}
/>Emit to parent
Ember Octane
<p>Are you happy?</p>
<AnswerButton @onYes={{this.handleYes}} @onNo={{this.handleNo}} />
<p style="font-size: 50px;">{{if this.isHappy "😀" "😥"}}</p>import { track } from "ripple";
import { AnswerButton } from "./AnswerButton.tsrx";
export function App() {
let &[isHappy] = track(true);
function onAnswerNo() {
isHappy = false;
}
function onAnswerYes() {
isHappy = true;
}
return <>
<p>"Are you happy?"</p>
<AnswerButton onYes={onAnswerYes} onNo={onAnswerNo} />
<p style={{ fontSize: "50px" }}>{isHappy ? "😀" : "😥"}</p>
</>;
}
Slot
Slot fallback
Context
Ember Octane
<UserProfile />import { RippleObject } from "ripple";
import { UserContext } from "./UserContext.tsrx";
import { UserProfile } from "./UserProfile.tsrx";
export function App() {
const user = new RippleObject({
id: 1,
username: "unicorn42",
email: "[email protected]",
});
UserContext.set(user);
return <>
<h1>"Welcome back, "{user.username}</h1>
<UserProfile />
</>;
}
Form input
Input text
Ember Octane
<p>{{this.text}}</p>
<input value={{this.text}} {{on "input" this.handleInput}} />Checkbox
Ember Octane
<input
id="is-available"
type="checkbox"
checked={{this.isAvailable}}
{{on "change" this.handleChange}}
/>
<label for="is-available">Is available</label>Radio
Ember Octane
<div>Picked: {{this.picked}}</div>
<input
id="blue-pill"
type="radio"
value="blue"
checked={{eq this.picked "blue"}}
{{on "change" this.handleChange}}
/>
<label htmlFor="blue-pill">Blue pill</label>
<input
id="red-pill"
type="radio"
value="red"
checked={{eq this.picked "red"}}
{{on "change" this.handleChange}}
/>
<label htmlFor="red-pill">Red pill</label>import { bindGroup, track } from "ripple";
export default function PickPill() {
let &[picked, pickedTracked] = track("red");
return <>
<div>"Picked: "{picked}</div>
<input
id="blue-pill"
type="radio"
value="blue"
ref={bindGroup(pickedTracked)}
/>
<label for="blue-pill">"Blue pill"</label>
<input
id="red-pill"
type="radio"
value="red"
ref={bindGroup(pickedTracked)}
/>
<label for="red-pill">"Red pill"</label>
</>;
}
Select
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>import { bindValue, track } from "ripple";
const colors = [
{ id: 1, text: "red" },
{ id: 2, text: "blue" },
{ id: 3, text: "green" },
{ id: 4, text: "gray", isDisabled: true },
];
export default function ColorSelect() {
let &[selectedColorId, selectedColorIdTracked] = track(2);
return <select ref={bindValue(selectedColorIdTracked)}>
for (const color of colors; key color.id) {
<option value={color.id} disabled={color.isDisabled}>
{color.text}
</option>
}
</select>;
}
Webapp features
Render app
Ember Octane
Missing snippet Help us to improve Component Party 
Ripple
<!doctype html>
<html>
<body>
<div id="app"></div>
<script type="module" src="./main.js"></script>
</body>
</html>
Fetch data
Ember Octane
{{#let (this.fetchUsers) as |request|}}
{{#if request.isLoading}}
<p>Fetching users...</p>
{{else if request.error}}
<p>An error occurred while fetching users</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}}import { useFetchUsers } from "./useFetchUsers.tsrx";
export function App() {
const data = useFetchUsers();
return <>
if (data.isLoading) {
<p>"Fetching users..."</p>
} else if (data.error) {
<p>"An error occurred while fetching users"</p>
} else if (data.users) {
<ul>
for (const user of data.users; key user.login.uuid) {
<li>
<img src={user.picture.thumbnail} alt="user" />
<p>{user.name.first}" "{user.name.last}</p>
</li>
}
</ul>
}
</>;
}