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Global variable undefined within function

I'm trying to store the lines of a local file as an array (where each line is a separate element). When I try to access the array later, I recieve an error, saying that the array is undefined.

var lines;

fetch("textfile.txt")
    .then((response) => {
        return response.text();
    })
    .then((text) => {
        lines=text.split('\n');
      console.log(text);  //Prints the text in the file
      console.log(lines); //Prints the correct array
    });
  
console.log(lines); //Print undefined

How can I fix this so I can use the lines variable elsewhere. Thanks in advance for any help.

about 4 years ago · Juan Pablo Isaza
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