javascript - bind() : You are binding a component method to the component. React 会自动为你做这个吗？

Question

我从 reactJS.NET 收到这个警告

bind(): You are binding a component method to the component. React does this for you automatically in a high-performance way, so you can safely remove this call. See LikeCon

组件看起来像这样

var LikeCon = React.createClass({
    handleClick: function() {
            var data = new FormData();
            var like = !this.state.like;
            var likeCounter = this.state.likeCount;

            data.append("catgoryType", this.state.categoryKey);
            data.append("objectId", this.state.objectId);
            data.append("like", like);

            if(like)
                likeCounter++;
            else
                likeCounter--;

            this.setState({ like: like, likeCount: likeCounter, userId: this.state.userId, categoryKey: this.state.categoryKey, objectId: this.state.objectId});

            var xhr = new XMLHttpRequest();
            xhr.open("post", "http://localhost:2215/Home/SetLike", true);
            xhr.onload = function() {
        };
        xhr.send(data);
    },
    getInitialState: function() {
        return { like: this.props.initialLike, likeCount: this.props.initialLikeCount, userId: this.props.userId, categoryKey: this.props.categoryKey, objectId: this.props.objectId  };
    },
    render(){
        return this.renderLikeButton()
    },
    renderLikeButton(){
        return (
                content =  
                <div className="likeCon">
                    <div className={this.state.like==true ? "likeButConAct" : "likeButCon"}>
                        <div className="likeB" title={this.state.like==true ? "Unlike" : "Like"} onClick={this.handleClick.bind(this)} >
                            &nbsp;
                        </div>
                        { this.state.likeCount > 0 ? <div className="likeCount">{this.state.likeCount}</div>: null}

                    </div>
                </div>
            );
    }
})

我在调用 handleClick 方法时使用了一个绑定(bind)，如果我删除它，我会得到另一个异常吗？那我该怎么办？

Answer 1

改为传递 *.bind(null,this)；

参见 this Google Groups thread解释。