Javascript 将数字传递给组件
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Passing a number to a component
提问by VitalyB
I am trying to pass a number to a React component but it is getting parsed as string (jsfiddle). How do I make React understand that I am passing a number? Should I cast the string to a number in the component?
我正在尝试将一个数字传递给 React 组件，但它被解析为字符串（jsfiddle）。我如何让 React 理解我正在传递一个数字？我应该将字符串转换为组件中的数字吗？
var Rectangle = React.createClass({
render: function() {
return <div>
<div>{this.props.intValue + 10}</div>
<div>{this.props.stringValue + 10}</div>
</div>;
}
});
React.render(<Rectangle intValue="10" stringValue="Hello" />
, document.getElementById('container'));<script src="https://facebook.github.io/react/js/jsfiddle-integration.js"></script>
<div id="container">
<!-- This element's contents will be replaced with your component. -->
</div>回答by VitalyB
It seems that in case of integers (and actually for strings as well) I should be passing the numbers via {}like so:
似乎在整数（实际上也是字符串）的情况下，我应该{}像这样传递数字：
React.render(<Rectangle intValue={10} stringValue={"Hello"} />, document.getElementById('container'));
React.render(<Rectangle intValue={10} stringValue={"Hello"} />, document.getElementById('container'));
