var obj={a:1}
function a(obj) {
obj={}
obj.a=2
}
a(obj)after the above code executes function an on obj, obj.an is still equal to 1. Why?
var obj={a:1}
function a(obj) {
obj={}
obj.a=2
}
a(obj)after the above code executes function an on obj, obj.an is still equal to 1. Why?
if you print the obj externally, he will definitely visit window.obj;
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