记录一下，用到的input输入框限制表情的输入

class Input extends React.Component<IProps, IState> {
   private emojiReg =
        /[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF][\u200D|\uFE0F]|[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF]|[0-9|*|#]\uFE0F\u20E3|[0-9|#]\u20E3|[\u203C-\u3299]\uFE0F\u200D|[\u203C-\u3299]\uFE0F|[\u2122-\u2B55]|\u303D|[\A9|\AE]\u3030|\uA9|\uAE|\u3030/gi;

   onInput = (e) => {
        const { maxLen = 0 } = this.props;
        const value =
            (e.target.value &&
                e.target.value
                    .replace(/^\s+/, "")
                    .replace(this.emojiReg, "")) ||
            "";
        if (this.inputRef) {
            this.inputRef.style.cssText = "height: auto";
            this.inputRef.style.cssText = `height: ${e.target.scrollHeight}px`;
        }
        if (maxLen) {
            this.setState({ value: value.slice(0, maxLen) }, () => {
                this.props.onChange(this.state.value);
            });
        } else {
            this.setState({ value });
            this.props.onChange(value);
        }
    };
  render(){
    ...
  }
}