When readAsText() function is completed the result is stored in .result

How do I see if the content of the file read are correct in .result? 

 fr = new FileReader();
 fr.readAsText(file);
 var x = fr.result;
 console.log(x); //does not display anything on console

Now how do I display the .result object to verify the the content?

javascript html fileapi
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