React Typescript:类型'{[x:number]的参数:任意； }'不能分配给类型的参数 [英] React Typescript: Argument of type '{ [x: number]: any; }' is not assignable to parameter of type

问题描述

我在项目(React，TS，Mobx)中添加了onChange方法，但出现错误:Argument of type '{ [x: number]: any; }' is not assignable to parameter of type

I added onChange method in my project(React, TS, Mobx), but I am getting an error: Argument of type '{ [x: number]: any; }' is not assignable to parameter of type

我是TypeScript的新手，不确定为什么会这样.可能是什么问题?

I am new to TypeScript and not sure why it's happening. What can be the problem?

(parameter) event: {
    target: {
        name: any;
        value: any;
    };
}

'{[x:number]类型的参数:任意； }'不可分配给 'IAddPlayerFormState类型的参数| ((prevState: 只读，道具:只读) => IAddPlayerFormState |选择| null)|选择< ...> |空".

Argument of type '{ [x: number]: any; }' is not assignable to parameter of type 'IAddPlayerFormState | ((prevState: Readonly, props: Readonly) => IAddPlayerFormState | Pick | null) | Pick<...> | null'.

import React, { Component } from 'react';
import ViewStore from '../../../store/ViewStore';
import { TextField } from './../../../utils';

interface IAddPlayerFormProps {
  viewStore?: ViewStore; // Optional ViewStore
}

interface IAddPlayerFormState {
  playerName: string;
  isDisabled: boolean;
}

class AddPlayerForm extends Component<IAddPlayerFormProps, IAddPlayerFormState> {
  constructor(props: Readonly<IAddPlayerFormProps>) {
    super(props);

    this.state = {
      isDisabled: false,
      playerName: '',
    };
  }

  public onChange(event: { target: { name: any; value: any; }; }) {
    this.setState({ [event.target.name]: event.target.value });
    console.log('On Change!');
  }

  public handleSubmit = () => {
    console.log('On submit!');
  }

  public render() {
    const { isDisabled } = this.state;

    return (
      <form onSubmit={this.handleSubmit}>
        <TextField
          type="text"
          name="name"
          value={name}
          placeholder="Add player"
          onChange={this.onChange}
          disabled={isDisabled}
        />

        <input type="submit" />
      </form>
    );
  }
}

export default AddPlayerForm;

推荐答案

您需要告诉Typescript您的对象将具有IAddPlayerFormState的一个或多个属性，但不一定具有所有属性.您可以这样做:

You need to tell Typescript that your object will have one or more property from IAddPlayerFormState, but not necessarily all properties. You can do it like this:

public onChange(event: { target: { name: any; value: any; }; }) {
  const newState = { [name]: value } as Pick<IAddPlayerFormState, keyof IAddPlayerFormState>;
  this.setState(newState);
  console.log("On Change!");
}

这篇关于React Typescript:类型'{[x:number]的参数:任意； }'不能分配给类型的参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！