簡體   English   中英

來自外部文件 React Hooks 中 function 的 setState

[英]setState from the function in external file React Hooks

考慮一下:

import { someFunc } from "./someFunc";

const Container = () => {
    const [containerState, setContainerState] = useReducer(
    (state, newState) => ({ ...state, ...newState }),
    { value: "", text: "some text here" });
    // I want to move the function bellow into external file (see the "import" above)
    // const someFunc = () => {
    //    setContainerState({value: "string"})
    // }
    // like this:
    // const extFunc = someFunc();
    // useImperativeHandle(ref, () => ({
    //     someFunc()
    // }));
    // but if I do so, I'll get "setContainerState" is undefined
    // how can I move this function to external file?
    // it is long and it makes my component messy and hard to read
    return (
        <h1>Test Title</h1>
        <button onClick={someFunc}>click me</button>
    )
}

我在這里看到了一些類似的問題/答案,但是使用了Class組件,但是如何使用 Hooks 像這樣 setState 呢?

PS:我需要使用 useImperativeHandle 來實現我的其他邏輯

您可以移動 function,但您必須將setContainerValue作為參數傳遞給它:

export const someFunc(setContainerState => {
    setContainerState({value: "string"});
};

不需要useImperativeHandle ,直接在Container中調用someFunc即可。

暫無
暫無

聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.

 
粵ICP備18138465號  © 2020-2024 STACKOOM.COM