问限制输入数量

EN

class Calculator extends Component {
constructor(props) {
    super(props);
    this.state = { value: "" };
    this.handleClick = this.handleClick.bind(this);
}
handleClick(evt) {
    const id = evt.target.id;
    const result = evt.target.value;
    if (id === "clear") {
    this.setState({ value: 0 });
    } else if (id === "equals") {
    this.setState({ value: math.eval(this.state.value) });
    } else {
    result.toString().includes("00");
    this.setState({ value: this.state.value + result.replace("00", "0") });
    console.log(this.state.value);
    }
}

render() {
    return (
    <div id="container">
        <Display value={this.state.value} />
        <Button onClick={this.handleClick} id="zero" value={"0"} />
        <Button onClick={this.handleClick} id="one" value={"1"} />
        <Button onClick={this.handleClick} id="two" value={"2"} />
        <Button onClick={this.handleClick} id="three" value={"3"} />
        <Button onClick={this.handleClick} id="four" value={"4"} />
        <Button onClick={this.handleClick} id="five" value={"5"} />
        <Button onClick={this.handleClick} id="six" value={"6"} />
        <Button onClick={this.handleClick} id="seven" value={"7"} />
        <Button onClick={this.handleClick} id="eight" value={"8"} />
        <Button onClick={this.handleClick} id="nine" value={"9"} />
        <Button onClick={this.handleClick} id="decimal" value={"."} />
        <Button onClick={this.handleClick} id="equals" value={"="} />
        <Button onClick={this.handleClick} id="clear" value={"clear"} />
        <Button onClick={this.handleClick} id="add" value={"+"} />
        <Button onClick={this.handleClick} id="subtract" value={"-"} />
        <Button onClick={this.handleClick} id="multiply" value={"*"} />
        <Button onClick={this.handleClick} id="divide" value={"/"} />
    </div>
    );
}
}
export default Calculator;