shallow copy:
function shalowCopy(obj) {
return {...obj}
}
Deep copy
function deepCopy(obj) {
return JSON.parse(JSON.stringify(obj))
}
you can take a look at this article
. shallow copy: Object.assign {.obj}
Deep copy: copy layer by layer, pushState , JSON.parse+JSON.stringify
which way to achieve deep copy is efficient?
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