Question

我正在使用React-Router测试存根示例，我之前从未见过这个类约定。我猜这是特定的ES6？

var stubRouterContext = (Component, props, stubs) => {
    function RouterStub() { }

    Object.assign(RouterStub, {
        makePath () {},
        makeHref () {},
        transitionTo () {},
        replaceWith () {},
        goBack () {},
        getCurrentPath () {},
        getCurrentRoutes () {},
        getCurrentPathname () {},
        getCurrentParams () {},
        getCurrentQuery () {},
        isActive () {},
        getRouteAtDepth() {},
        setRouteComponentAtDepth() {}
    }, stubs);

    return React.createClass({
        childContextTypes: {
            router: React.PropTypes.func,
            routeDepth: React.PropTypes.number
        },

        getChildContext () {
            return {
                router: RouterStub,
                routeDepth: 0
            };
        },

        render () {
            return <Component {...props} />
        }
    });
};

为什么我会得到TypeError：当我这样做时，object不是函数？

var Subject = stubRouterContext(Handler, props);

这是指向文档https://github.com/rackt/react-router/blob/master/docs/guides/testing.md

的链接

Answer 1

特定于ES6，它是箭头速记：https://github.com/lukehoban/es6features#arrows

＆＃34;箭头是使用=>语法的函数简写。它们在语法上类似于C＃，Java 8和CoffeeScript中的相关功能。＆＃34;

什么是var name =（param）=＆gt; JS中的{}

1 个答案: