javascript - 如何在用户单击时删除框中的文本？

Question

到目前为止，我的代码在单击它时将 G 放在选定的框中。但是这次，我也想在单击它时将其删除。

我的代码哪里做错了，我该如何解决？

这是我的代码:

import React, { Component } from 'react';
import './Main.css';

class Main extends Component {
    constructor(props) {
        super(props);

        this.state = {
            board: Array(3).fill(''),
            symbol: 'G',
            deleted: ''
        }
    }

    circClicked(box) {
        this.setState({
            symbol: this.state.board[box.dataset]
        });

        box.innerText = this.state.symbol;

        if(this.state.board[box.dataset] === this.state.symbol) {
            for (let i = 0; i < this.state.board.length; i++) {
                let s = this.setState({board: this.state.board[i]});
                s--;
            }
        }
    }

    render() {
        return(
            <div id="game">
                <div id="board" onClick={(e) => this.circClicked(e.target)}>
                    <div className="circ"></div>
                    <div className="circ"></div>
                    <div className="circ"></div>
                </div>
            </div>
        );
    }
}

export default Main;

Answer 1

考虑修改您的方法，以便您委派渲染/填充 UI 以使用react的责任。这将使您的 UI 行为更可预测。

也许这样的事情对你有用？

import React, { Component } from 'react';
import './Main.css';

class Main extends Component {
    constructor(props) {
        super(props);

        this.state = {
            board: Array(3).fill(''),
            symbol: 'G',
            deleted: ''
        }
    }

    circClicked(index) {

        // Clone the board array
        const board = [...this.state.board]

        // Assign the next value to be shown in this "circ" element
        board[index] = board[index] ? '' : this.state.symbol

        // Update the render values to be displayed
        this.setState({ board });
    }

    render() {
        return(
            <div id="game">
                <div id="board">
                    <div className="circ" onClick={(e) => this.circClicked(0)}>{ this.state.board[0] }</div>
                    <div className="circ" onClick={(e) => this.circClicked(1)}>{ this.state.board[1] }</div>
                    <div className="circ" onClick={(e) => this.circClicked(2)}>{ this.state.board[2] }</div>
                </div>
            </div>
        );
    }
}

export default Main;