Ember Octane vs Solid.js Comparison

Reactivity

Declare state

Ember Octane

name.hbs

<h1>Hello {{this.name}}</h1>

Solid.js

Name.jsx

import { createSignal } from "solid-js";

export default function Name() {
  const [name] = createSignal("John");

  return <h1>Hello {name()}</h1>;
}

Update state

Ember Octane

name.hbs

<h1>Hello {{this.name}}</h1>

Solid.js

Name.jsx

import { createSignal } from "solid-js";

export default function Name() {
  const [name, setName] = createSignal("John");
  setName("Jane");

  return <h1>Hello {name()}</h1>;
}

Computed state

Ember Octane

double-count.hbs

<div>{{this.doubleCount}}</div>

Solid.js

DoubleCount.jsx

import { createSignal } from "solid-js";

export default function DoubleCount() {
  const [count] = createSignal(10);
  const doubleCount = () => count() * 2;

  return <div>{doubleCount()}</div>;
}

Templating

Minimal template

Ember Octane

hello-world.hbs

<h1>Hello world</h1>

Solid.js

HelloWorld.jsx

export default function HelloWorld() {
  return <h1>Hello World!</h1>;
}

Styling

Ember Octane

css-style.css

/* using: https://github.com/salsify/ember-css-modules */
.title {
  color: red;
}

Solid.js

CssStyle.jsx

import "./style.css";

export default function CssStyle() {
  return (
    <>
      <h1 class="title">I am red</h1>
      <button style={{ "font-size": "10rem" }}>I am a button</button>
    </>
  );
}

Loop

Ember Octane

colors.hbs

<ul>
  {{#each (array "red" "green" "blue") as |color|}}
    <li>{{color}}</li>
  {{/each}}
</ul>

Solid.js

Colors.jsx

import { For } from "solid-js";

export default function Colors() {
  const colors = ["red", "green", "blue"];

  return (
    <ul>
      <For each={colors}>{(color) => <li>{color}</li>}</For>
    </ul>
  );
}

Event click

Ember Octane

counter.hbs

<p>Counter: {{this.count}}</p>
<button {{on "click" this.incrementCount}}>+1</button>

Solid.js

Counter.jsx

import { createSignal } from "solid-js";

export default function Counter() {
  const [count, setCount] = createSignal(0);

  function incrementCount() {
    setCount(count() + 1);
  }

  return (
    <>
      <p>Counter: {count()}</p>
      <button onClick={incrementCount}>+1</button>
    </>
  );
}

Dom ref

Ember Octane

input-focused.hbs

<input {{this.autofocus}} />

Solid.js

InputFocused.jsx

import { onMount } from "solid-js";

export default function InputFocused() {
  let inputElement;

  onMount(() => inputElement.focus());

  return <input ref={inputElement} type="text" />;
}

Conditional

Ember Octane

traffic-light.hbs

<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>

Solid.js

TrafficLight.jsx

import { createSignal, Switch, Match } from "solid-js";

const TRAFFIC_LIGHTS = ["red", "orange", "green"];

export default function TrafficLight() {
  const [lightIndex, setLightIndex] = createSignal(0);

  const light = () => TRAFFIC_LIGHTS[lightIndex()];

  function nextLight() {
    setLightIndex((lightIndex() + 1) % TRAFFIC_LIGHTS.length);
  }

  return (
    <>
      <button onClick={nextLight}>Next light</button>
      <p>Light is: {light()}</p>
      <p>
        You must
        <Switch>
          <Match when={light() === "red"}>
            <span>STOP</span>
          </Match>
          <Match when={light() === "orange"}>
            <span>SLOW DOWN</span>
          </Match>
          <Match when={light() === "green"}>
            <span>GO</span>
          </Match>
        </Switch>
      </p>
    </>
  );
}

Lifecycle

On mount

Ember Octane

page-title.hbs

<p>Page title is: {{(this.pageTitle)}}</p>

Solid.js

PageTitle.jsx

import { createSignal, onMount } from "solid-js";

export default function PageTitle() {
  const [pageTitle, setPageTitle] = createSignal("");

  onMount(() => {
    setPageTitle(document.title);
  });

  return <p>Page title: {pageTitle()}</p>;
}

On unmount

Ember Octane

time.hbs

<p>Current time: {{this.time}}</p>

Solid.js

Time.jsx

import { createSignal, onCleanup } from "solid-js";

export default function Time() {
  const [time, setTime] = createSignal(new Date().toLocaleTimeString());

  const timer = setInterval(() => {
    setTime(new Date().toLocaleTimeString());
  }, 1000);

  onCleanup(() => clearInterval(timer));

  return <p>Current time: {time()}</p>;
}

Component composition

Props

Ember Octane

app.hbs

<UserProfile
  @name="John"
  @age={{20}}
  @favouriteColors={{array "green" "blue" "red"}}
  @isAvailable={{true}}
/>

Solid.js

App.jsx

import UserProfile from "./UserProfile.jsx";

export default function App() {
  return (
    <UserProfile
      name="John"
      age={20}
      favouriteColors={["green", "blue", "red"]}
      isAvailable
    />
  );
}

Emit to parent

Ember Octane

app.hbs

<p>Are you happy?</p>
<AnswerButton @onYes={{this.handleYes}} @onNo={{this.handleNo}} />
<p style="font-size: 50px;">{{if this.isHappy "😀" "😥"}}</p>

Solid.js

App.jsx

import { createSignal } from "solid-js";
import AnswerButton from "./AnswerButton.jsx";

export default function App() {
  const [isHappy, setIsHappy] = createSignal(true);

  function onAnswerNo() {
    setIsHappy(false);
  }

  function onAnswerYes() {
    setIsHappy(true);
  }

  return (
    <>
      <p>Are you happy?</p>
      <AnswerButton onYes={onAnswerYes} onNo={onAnswerNo} />
      <p style={{ "font-size": "50px" }}>{isHappy() ? "😀" : "😥"}</p>
    </>
  );
}

Slot

Ember Octane

app.hbs

<FunnyButton> Click me! </FunnyButton>

Solid.js

App.jsx

import FunnyButton from "./FunnyButton.jsx";

export default function App() {
  return <FunnyButton>Click me!</FunnyButton>;
}

Slot fallback

Ember Octane

app.hbs

<FunnyButton />
<FunnyButton>I got content!</FunnyButton>

Solid.js

App.jsx

import FunnyButton from "./FunnyButton.jsx";

export default function App() {
  return (
    <>
      <FunnyButton />
      <FunnyButton>I got content!</FunnyButton>
    </>
  );
}

Context

Ember Octane

app.hbs

<UserProfile />

Solid.js

App.jsx

import { createSignal } from "solid-js";

import { UserContext } from "./UserContext";
import UserProfile from "./UserProfile";

export default function App() {
  const [user, setUser] = createSignal({
    id: 1,
    username: "unicorn42",
    email: "unicorn42@example.com",
  });

  function updateUsername(newUsername) {
    setUser({ ...user(), username: newUsername });
  }

  return (
    <>
      <h1>Welcome back, {user().username}</h1>
      <UserContext.Provider value={[user, updateUsername]}>
        <UserProfile />
      </UserContext.Provider>
    </>
  );
}

Form input

Input text

Ember Octane

input-hello.hbs

<p>{{this.text}}</p>
<input value={{this.text}} {{on "input" this.handleInput}} />

Solid.js

InputHello.jsx

import { createSignal } from "solid-js";

export default function InputHello() {
  const [text, setText] = createSignal("Hello world");

  function handleChange(event) {
    setText(event.target.value);
  }

  return (
    <>
      <p>{text()}</p>
      <input value={text()} onInput={handleChange} />
    </>
  );
}

Checkbox

Ember Octane

is-available.hbs

<input
  id="is-available"
  type="checkbox"
  checked={{this.isAvailable}}
  {{on "change" this.handleChange}}
/>
<label for="is-available">Is available</label>

Solid.js

IsAvailable.jsx

import { createSignal } from "solid-js";

export default function IsAvailable() {
  const [isAvailable, setIsAvailable] = createSignal(false);

  function handleChange() {
    setIsAvailable((previousValue) => !previousValue);
  }

  return (
    <>
      <input
        id="is-available"
        type="checkbox"
        checked={isAvailable()}
        onChange={handleChange}
      />
      <label for="is-available">Is available</label>
    </>
  );
}

Radio

Ember Octane

pick-pill.hbs

<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>

Solid.js

PickPill.jsx

import { createSignal } from "solid-js";

export default function PickPill() {
  const [picked, setPicked] = createSignal("red");

  function handleChange(event) {
    setPicked(event.target.value);
  }

  return (
    <>
      <div>Picked: {picked()}</div>
      <input
        id="blue-pill"
        checked={picked() === "blue"}
        type="radio"
        value="blue"
        onChange={handleChange}
      />
      <label for="blue-pill">Blue pill</label>

      <input
        id="red-pill"
        checked={picked() === "red"}
        type="radio"
        value="red"
        onChange={handleChange}
      />
      <label for="red-pill">Red pill</label>
    </>
  );
}

Select

Ember Octane

color-select.hbs

<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>

Solid.js

ColorSelect.jsx

import { createSignal, For } from "solid-js";

const colors = [
  { id: 1, text: "red" },
  { id: 2, text: "blue" },
  { id: 3, text: "green" },
  { id: 4, text: "gray", isDisabled: true },
];

export default function ColorSelect() {
  const [selectedColorId, setSelectedColorId] = createSignal(2);

  function handleChange(event) {
    setSelectedColorId(event.target.value);
  }

  return (
    <select value={selectedColorId()} onChange={handleChange}>
      <For each={colors}>
        {(color) => (
          <option value={color.id} disabled={color.isDisabled}>
            {color.text}
          </option>
        )}
      </For>
    </select>
  );
}

Webapp features

Render app

Ember Octane

index.html

<!DOCTYPE html>
<html>
  <body>
    <div id="app"></div>
    <script type="module" src="./main.jsx"></script>
  </body>
</html>

Solid.js

index.html

<!DOCTYPE html>
<html>
  <body>
    <div id="app"></div>
    <script type="module" src="./main.jsx"></script>
  </body>
</html>

Fetch data

Ember Octane

app.hbs

{{#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}}

Solid.js

App.jsx

import { createResource, For, Switch, Match } from "solid-js";

async function fetchUsers() {
  return (await fetch("https://randomuser.me/api/?results=3")).json();
}

export default function App() {
  const [data] = createResource(fetchUsers);
  const users = () => data()?.results;

  return (
    <Switch>
      <Match when={data.loading}>
        <p>Fetching users...</p>
      </Match>
      <Match when={data.error}>
        <p>An error occurred while fetching users</p>
      </Match>
      <Match when={users()}>
        <ul>
          <For each={users()}>
            {(user) => (
              <li>
                <img src={user.picture.thumbnail} alt="user" />
                <p>
                  {user.name.first} {user.name.last}
                </p>
              </li>
            )}
          </For>
        </ul>
      </Match>
    </Switch>
  );
}





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