I use spread to copy and assign a new value to the old object
const copy=old=>{ return {...old}; } const add=(old,val)=>{ return {...old,...val}; }
but this is the same as Object.assign({}, obj);, is not a deep copy.
Object.assign({}, obj);
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I use spread to copy and assign a new value to the old object
but this is the same as
Object.assign({}, obj);, is not a deep copy.