ES 之 06.對象結構賦值

const Tom={ name:'Tom', age:20, family:{ mother:'Norah Jones', father:'Richard Jones', brother:'Howard Jones', } } //之前已經聲明瞭的時候 let name ({name ,age}=Tom) const {mother,father: baba,grandma}=Tom.family //grandma undefined //如果沒屬性，給默認值 const {brother,son="have no son"}=Tom.family //如果有son,默認值不爲undefined,默認值不會生效