Component Party 中文版

<script>
  let name = $state("张三");
</script>

<h1>你好 {name}</h1>

<h1>你好 ${name}</h1>

<script>
  let name = $state("张三");
  name = "李四";
</script>

<h1>你好 {name}</h1>

<h1>你好 ${name}</h1>

<script>
  let count = $state(10);
  const doubleCount = $derived(count * 2);
</script>

<div>{doubleCount}</div>

<div>${doubleCount}</div>

<h1>你好，世界</h1>

<h1>你好，世界</h1>

<h1 class="title">我是红色的</h1>
<button style="font-size: 10rem;">我是一个按钮</button>

<style>
  .title {
    color: red;
  }
</style>

.title {
  color: red;
}

<script>
  const colors = ["红", "绿", "蓝"];
</script>

<ul>
  {#each colors as color (color)}
    <li>{color}</li>
  {/each}
</ul>

<ul>
  <li repeat.for="color of colors">${color}</li>
</ul>

<script>
  let count = $state(0);

  function incrementCount() {
    count++;
  }
</script>

<p>计数器: {count}</p>
<button onclick={incrementCount}>+1</button>

<p>计数器: ${count}</p>
<button click.trigger="incrementCount">+1</button>

<script>
  let inputElement;

  $effect(() => {
    inputElement.focus();
  });
</script>

<input bind:this={inputElement} />

<input ref="inputElement" />

<script>
  const TRAFFIC_LIGHTS = ["红灯", "黄灯", "绿灯"];
  let lightIndex = $state(0);

  const light = $derived(TRAFFIC_LIGHTS[lightIndex]);

  function nextLight() {
    lightIndex = (lightIndex + 1) % TRAFFIC_LIGHTS.length;
  }
</script>

<button onclick={nextLight}>下一个灯</button>
<p>现在亮着的是: {light}</p>
<p>
  你应该
  {#if light === "红灯"}
    <span>停下</span>
  {:else if light === "黄灯"}
    <span>慢行</span>
  {:else if light === "绿灯"}
    <span>赶紧走</span>
  {/if}
</p>

<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>

<script>
  let pageTitle = $state("");
  $effect(() => {
    pageTitle = document.title;
  });
</script>

<p>页面标题: {pageTitle}</p>

<p>页面标题: ${pageTitle}</p>

<script>
  let time = $state(new Date().toLocaleTimeString());

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

    return () => clearInterval(timer);
  });
</script>

<p>当前时间: {time}</p>

<p>当前时间: ${time}</p>

<script>
  import UserProfile from "./UserProfile.svelte";
</script>

<UserProfile
  name="张三"
  age={20}
  favouriteColors={["green", "blue", "red"]}
  isAvailable
/>

<user-profile
  name.bind
  age.bind
  favourite-colors.bind="colors"
  is-available.bind="available"
></user-profile>

<script>
  import AnswerButton from "./AnswerButton.svelte";

  let isHappy = $state(true);

  function onAnswerNo() {
    isHappy = false;
  }

  function onAnswerYes() {
    isHappy = true;
  }
</script>

<p>你快乐吗?</p>
<AnswerButton onYes={onAnswerYes} onNo={onAnswerNo} />
<p style="font-size: 50px;">{isHappy ? "😀" : "😥"}</p>

<p>你快乐吗?</p>
<answer-button action-handler.bind="handleAnswer"></answer-button>
<p style="font-size: 50px">${isHappy ? "😀" : "😥"}</p>

<script>
  import FunnyButton from "./FunnyButton.svelte";
</script>

<FunnyButton>点我!</FunnyButton>

<funny-button>点我!</funny-button>

<script>
  import FunnyButton from "./FunnyButton.svelte";
</script>

<FunnyButton />
<FunnyButton>这是传到slot的内容!</FunnyButton>

<funny-button></funny-button>
<funny-button>这是传到slot的内容!</funny-button>

<script>
  import { setContext } from "svelte";
  import UserProfile from "./UserProfile.svelte";
  import createUserState from "./createUserState.svelte.js";

  const user = createUserState({
    id: 1,
    username: "abcdefg",
    email: "[email protected]",
  });

  setContext("user", user);
</script>

<h1>欢迎回来, {user.username}</h1>
<UserProfile />

<h1>欢迎回来, {{ user.username }}</h1>
<user-profile />

<script>
  let text = $state("你好世界");
</script>

<p>{text}</p>
<input bind:value={text} />

<p>${text}</p>
<input value.bind />

<script>
  let isAvailable = $state(false);
</script>

<input id="is-available" type="checkbox" bind:checked={isAvailable} />
<label for="is-available">这是一个checkbox</label>

<input id="is-available" type="checkbox" checked.bind="isAvailable" />
<label for="is-available">这是一个checkbox</label>: ${isAvailable}

<script>
  let picked = $state("red");
</script>

<div>你选择了: {picked}</div>

<input id="blue-pill" bind:group={picked} type="radio" value="blue" />
<label for="blue-pill">蓝色</label>

<input id="red-pill" bind:group={picked} type="radio" value="red" />
<label for="red-pill">红色</label>

<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>

<script>
  let selectedColorId = $state(2);

  const colors = [
    { id: 1, text: "红" },
    { id: 2, text: "蓝" },
    { id: 3, text: "绿" },
    { id: 4, text: "灰", isDisabled: true },
  ];
</script>

<select bind:value={selectedColorId}>
  {#each colors as color}
    <option value={color.id} disabled={color.isDisabled}>
      {color.text}
    </option>
  {/each}
</select>

<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>

<!doctype html>
<html>
  <body>
    <div id="app"></div>
    <script type="module" src="./app.js"></script>
  </body>
</html>

<!doctype html>
<html>
  <head>
    <script type="module" src="./main.ts"></script>
  </head>

  <body>
    <app></app>
  </body>
</html>

<script>
  import useFetchUsers from "./useFetchUsers.svelte.js";

  const response = useFetchUsers();
</script>

{#if response.isLoading}
  <p>正在获取用户信息……</p>
{:else if response.error}
  <p>获取用户信息出错</p>
{:else if response.users}
  <ul>
    {#each response.users as user}
      <li>
        <img src={user.picture.thumbnail} alt="user" />
        <p>
          {user.name.first}
          {user.name.last}
        </p>
      </li>
    {/each}
  </ul>
{/if}

<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>