在 Redux 中使用 action creator 的主要好处是什么？

Question

假设我有一个 input 组件，它将从其 onChange 处理程序更新状态。

function updateInputState(newvalue) {
  return({
    type: "UPDATE_INPUT_STATE",
    payload: newValue
  });
}

function InputComponent(props) {
  
  function onChange(event) {
    const newValue = event.target.value;

    // OPTION #1 - WITHOUT AN ACTION CREATOR. DISPATCH THE ACTION DIRECTLY
    dispatch({
      type: "UPDATE_INPUT_STATE",
      payload: newValue
    });

    // OPTION #2 - WITH AN ACTION CREATOR
    dispatch(updateInputState(newValue));

  }

  return(
    <input value={props.value} onChange={onchange}/>
  );
}

我认为选项 #2 更具可读性，那么为什么我要使用 action creator 而不是常规的 action dispatch？

Answer 1

主要优点是简单易维护，尤其是 async actions。

Action creators can also be asynchronous and have side-effects.

因此简化了在组件视图中的使用：

// Lets say we suddenly want to make updateInputState async action
function InputComponent(props) {
  function onChange(event) {
    const newValue = event.target.value;
    // Edit its action creator implementation
    dispatch(updateInputState(newValue));

    // on the other hand, without action creator, you need to
    // change this code to async everywhere across the app
    dispatch({
      type: "UPDATE_INPUT_STATE",
      payload: newValue,
    });
  }

  return <input value={props.value} onChange={onchange} />;
}

Notice that writing action creators is more like "an old API" you should use redux-toolkit now (2020).

在 Redux 中使用 action creator 的主要好处是什么？

What is the main benefit of using action creators in Redux?

javascript

reactjs

redux

redux-actions