cannot read property of undefined although with checking

Question

I feel want to cry stuck in this for hours.

why would this code return error of cannot read property overwrite_date' of undefined?!

for (var i = 0; i < temp.length; i++) {

  console.log(data[i]) //return 3 item, no null or undefined value at all

  if(data[i]){

    let date = moment(data[i].overwrite_date).format('YYYY-MM-DD');
  }
}

Answer 1

You are iterating temp instead of data.

Change this:

for (var i = 0; i < temp.length; i++) {

To this:

for (var i = 0; i < data.length; i++) {
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