Question

我有一个简单的文本字段，由于某种原因，我想在按下按钮时清除该文本字段。.我将状态作为值传递给文本字段并更改状态，但该字段保持填充状态... < / p>

沙盒https://codesandbox.io/s/eager-edison-yqirl?file=/src/App.js

export default function App() {
  const [state, setState] = useState();
  const clear = () => {
    setState();
  };
  return (
    <div className="App">
      <h1>Hello CodeSandbox</h1>
      <TextField value={state} id="outlined-basic" variant="outlined" />
      <button onClick={() => clear()}>clear</button>
      <h2>Start editing to see some magic happen!</h2>
    </div>
  );
}

Answer 1

import React, { useState } from "react";
import "./styles.css";
import { TextField } from "@material-ui/core";
export default function App() {
  const [state, setState] = useState("");
  const clear = () => {
    setState("");
  };
  const handleChange = (event) => {
    setState(event.target.value);
  };
  return (
    <div className="App">
      <h1>Hello CodeSandbox</h1>
      <TextField
        value={state}
        id="outlined-basic"
        variant="outlined"
        onChange={handleChange}
      />
      <button onClick={() => clear()}>clear</button>
      <h2>Start editing to see some magic happen!</h2>
    </div>
  );
}

状态更改后，材料UI文本字段将无法清除

1 个答案: