框架.md

React

https://react.dev/

class:

class MyComponent extends React.Component {
  /* Adding state and binding custom methods */
  constructor() {
    super()
    this.state = { ... }

    this.customMethodOne = this.customMethodOne.bind(this)
    this.customMethodTwo = this.customMethodTwo.bind(this)
  }

  /* Lifecycle Methods */
  componentDidMount() { ...}
  componentWillUnmount() { ... }

  /* Custom methods */
  customMethodOne() { ... }
  customMethodTwo() { ... }

  render() { return { ... }}
}

function:

function Input() {
  const [input, setInput] = React.useState("");

  return <input onChange={(e) => setInput(e.target.value)} value={input} />;
}

1. Rendering with JSX . How JSX work?(compile to createElement function)
2. complex JSX

    <div>
      {props.children.map((child) =>
        React.createElement(child, { open, toggle }) // or <Child { open, toggle } />
      )}
    </div>

4. Components, Elements, Props, and State
5. state management(redux, react query, reselect etc)， Selectors(derived state) and how to avoid unnecessary updates reselecthttps://tkdodo.eu/blog/why-you-want-react-query
6. hooks

componentDidMount() { ... }
useEffect(() => { ... }, [])

componentWillUnmount() { ... }
useEffect(() => { return () => { ... } }, [])

componentDidUpdate() { ... }
useEffect(() => { ... })

custom hook(可以返回 data，这样可以作为一个数据容器给展示组件使用)

function useKeyPress(targetKey) {
  const [keyPressed, setKeyPressed] = React.useState(false);

  function handleDown({ key }) {
    if (key === targetKey) {
      setKeyPressed(true);
    }
  }

  function handleUp({ key }) {
    if (key === targetKey) {
      setKeyPressed(false);
    }
  }

  React.useEffect(() => {
    window.addEventListener("keydown", handleDown);
    window.addEventListener("keyup", handleUp);

    return () => {
      window.removeEventListener("keydown", handleDown);
      window.removeEventListener("keyup", handleUp);
    };
  }, []);

  return keyPressed;
}

6. lifecycle

---

5. HOC

function withStyles(Component) {
  return props => {
    const style = { padding: '0.2rem', margin: '1rem' }
    return <Component style={style} {...props} />
  }
}

6. context
7. how to implement a popup, dialog, select...?
8. Container component and Presentational component(关注点分离思想)
9. render props(named slots in vue)

<Title render={() => <h1>I am a render prop!</h1>} />

const Title = (props) => props.render();

10. write react(vue) on your own

Vue

<script>
  export default {
    name: "MyComponent",
    props: {
      // props
    },
    data() {
      // data
    },
    computed: {
      // computed properties
    },
    watch: {
      // properties to watch
    },
    methods: {
      // methods
    },
    created() {
      // lifecyle methods like created
    },
    // ...
  };
</script>

1. Composables

<template>
  <div class="App">
    <Count :count="count" :increment="increment" :decrement="decrement" />
    <div id="divider" />
    <Width :width="width" />
  </div>
</template>

<script>
  import { ref, onMounted, onBeforeUnmount } from "vue";
  import Count from "./components/Count.vue";
  import Width from "./components/Width.vue";

  export default {
    name: "App",
    setup() {
      const count = ref(0);
      const width = ref(0);

      const increment = () => {
        count.value++;
      };

      const decrement = () => {
        count.value--;
      };

      const handleResize = () => {
        width.value = window.innerWidth;
      };

      onMounted(() => {
        handleResize();
        window.addEventListener("resize", handleResize);
      });

      onBeforeUnmount(() => {
        window.removeEventListener("resize", handleResize);
      });

      return {
        count,
        width,
        increment,
        decrement,
      };
    },
    components: {
      Count,
      Width,
    },
  };
</script>

->

import { ref } from "vue";

export function useCounter(initialCount = 0) {
  const count = ref(initialCount);

  function increment() {
    count.value++;
  }

  function decrement() {
    count.value--;
  }

  return {
    count,
    increment,
    decrement,
  };
}

and

import { ref, onMounted, onBeforeUnmount } from "vue";

export function useWidth() {
  const width = ref(0);

  function handleResize() {
    width.value = window.innerWidth;
  }

  onMounted(() => {
    handleResize();
    window.addEventListener("resize", handleResize);
  });

  onBeforeUnmount(() => {
    window.removeEventListener("resize", handleResize);
  });

  return {
    width,
  };
}

and then

<template>
  <div class="App">
    <Count :count="count" :increment="increment" :decrement="decrement" />
    <div id="divider" />
    <Width :width="width" />
  </div>
</template>

<script>
  import Count from "./components/Count.vue";
  import Width from "./components/Width.vue";
  import { useCounter } from "./composables/useCounter";
  import { useWidth } from "./composables/useWidth";

  export default {
    name: "App",
    components: {
      Count,
      Width,
    },
    setup() {
      const { count, increment, decrement } = useCounter(0);
      const { width } = useWidth();

      return {
        count,
        increment,
        decrement,
        width,
      };
    },
  };
</script>

2. Script Setup
3. slot
4. State Management（Pinia）
5. events handling
6. Provide/Inject
7. Dynamic Components
8. Reactive state
9. custom hook(可以返回 data，这样可以作为一个数据容器给展示组件使用)
10. Container component and Presentational component(关注点分离思想)
11. 动态组件

  <component :is="tabs[currentTab]" class="tab"></component>

PS: React 动态组件就超级简单了

<this.state.x />

10. 内置组件（KeepAlive）
11. Provide/Inject
12. render function

<script setup>
  import { h } from "vue";

  const { message } = defineProps(["message"]);

  const render = () => {
    return h(
      "div",
      {
        class: "render-card",
      },
      [
        h(
          "header",
          {
            class: "card-header card-header-title",
          },
          message
        ),
      ]
    );
  };
</script>

or

<template>
  <render />
</template>

<script setup lang="jsx">
  const { message } = defineProps(["message"]);

  const render = (
    <div class="render-card">
      <header class="card-header card-header-title">{message}</header>
    </div>
  );
</script>

13. renderless component (类似于自定义 hook 作为数据源)

<template>
  <slot :checkbox="checkbox" :toggleCheckbox="toggleCheckbox"></slot>
</template>

<script setup>
  import { ref } from "vue";

  const checkbox = ref(false);

  const toggleCheckbox = () => {
    checkbox.value = !checkbox.value;
  };
</script>

use:

<template>
  <ToggleComponent v-slot="{ checkbox, toggleCheckbox }">
    <div class="comp">
      <label class="switch">
        <input type="checkbox" :value="checkbox" @click="toggleCheckbox" />
        <div class="slider rounded" :class="checkbox ? 'active' : ''"></div>
      </label>
    </div>
  </ToggleComponent>
</template>

<script setup>
  import ToggleComponent from "./components/ToggleComponent";
</script>

14. split component into chunks

import { defineAsyncComponent } from "vue";

const AsyncComp = defineAsyncComponent(() => {
  return new Promise((resolve, reject) => {
    // ...load component from the server
    resolve(/* loaded component */);
  });
});

or:

import { defineAsyncComponent } from "vue";

export const AsyncComp = defineAsyncComponent(() =>
  import("./components/MyComponent.vue")
);

advanced usage:

import { defineAsyncComponent } from "vue";
import Loading from "./Loading.vue";
import Error from "./Error.vue";

export const AsyncModal = defineAsyncComponent({
  loader: () => import("./Modal.vue"),
  loadingComponent: Loading,
  errorComponent: Error,
});