how to fix property undefined error in javascript?

Question

I am unable to get why I am getting error that cannot read property. I am reading data from EndPonit API and my property name of json object which is label is correct. Actually,I am pushing data into array and making an array of objects. Here is my code. Can anyone help me please?Thanks js code

 let airports=[];
 fetch('http://myApi')
    .then(response => response.json())
    .then(airportData=>{
          this.airports.push({
            'code':airportData.label.substr(0,3),
            'city':airportData.label.split(',')[1],
            'country':airportData.label.split(',')[2],
            'airportFullName':airportData.label.split(',')[3]
          });

    });

Answer 1

等待大神答复