Question

我有一个父组件，它引入了一个子组件，它引入了另一个子组件。我希望能够从顶级父级设置该子级的子组件。无法弄清楚如何做到这一点。以下是一些代码，用于演示我要做的事情：

var TopParent = React.createClass({
    render: function() {
        return (
            <div className="topParent">
                <Child componentVariable="BottomChild">
            </div>
        );
    }
});

var Child = React.createClass({
    render: function() {
        return (
            <div className="child">
                <{this.props.componentVariable} />  // this should pull in a component based on what is passed from TopParent
            </div>
        );
    }
});

var BottomChild = React.createClass({
    render: function() {
        return (
            <div className="bottomChild">
                I am the bottom child. I should be able to be swapped out from TopParent.
            </div>
        );
    }
});

此外，一旦我弄清楚如何执行此操作，如何确保Child需要BottomChild组件的正确文件？

Answer 1

只使用实际引用，而不是字符串;毕竟，当您手动渲染<Child />这样的组件时，它也是一个参考。

var TopParent = React.createClass({
    render: function() {
        return (
            <div className="topParent">
                <Child componentVariable={BottomChild} />
            </div>
        );
    }
});

var Child = React.createClass({
    render: function() {
        var Component = this.props.componentVariable; // make sure the var is capitalized
        return (
            <div className="child">
                <Component />
            </div>
        );
    }
});

var BottomChild = React.createClass({
    render: function() {
        return (
            <div className="bottomChild">
                I am the bottom child. I should be able to be swapped out from TopParent.
            </div>
        );
    }
});

但是，在许多情况下，允许组件to completely control the contents of the child：

是有意义的

var TopParent = React.createClass({
    render: function() {
        return (
            <div className="topParent">
                <Child>
                    <BottomChild />
                </Child>
            </div>
        );
    }
});

var Child = React.createClass({
    render: function() {
        // `this.props.children` is the *contents* of the `Child` component
        // as specified in the JSX of `TopParent`
        return (
            <div className="child">
                {this.props.children}
            </div>
        );
    }
});

var BottomChild = React.createClass({
    render: function() {
        return (
            <div className="bottomChild">
                I am the bottom child. I should be able to be swapped out from TopParent.
            </div>
        );
    }
});

如何在父组件的React中设置子组件中的动态组件？

1 个答案: