console.log typed out a reference, and the expanded content may change, but the top line is a snapshot
your case shows that the key delete with attribute number 0 somewhere in the code after console.log
for (var i in data) {
if (data[i] == "") {
delete data[i]
}
}has found the reason, because the following code clears the empty string using = = will clear 0, too, and change it to =. Now there is a new question, why does the following code affect the above, doesn't js execute from top to bottom
try console.log (JSON.stringify (data)) to see the current data property, but convert it to a string
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