JS函数声明：在参数声明中赋予空对象的花括号对象

Here is the code,

这是代码,

export function createConnect({
    connectHOC = connectAdvanced,
    mapStateToPropsFactories = defaultMapStateToPropsFactories,
    mapDispatchToPropsFactories = defaultMapDispatchToPropsFactories,
    mergePropsFactories = defaultMergePropsFactories,
    selectorFactory = defaultSelectorFactory
} = {}) {...}
export function cre