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ViewsWhy is event.target.files[0].name showing error in my code?
I have this JS code (given below) which converts a JSON file to XML file. Everything works perfectly (I get the contents of the file), but now I want to fetch the filename of the uploaded file.
function onChange(event) {
var reader = new FileReader();
reader.onload = (event)=>{
let data = JSON.parse(event.target.result);
$("#jsonArea").val(event.target.result);
var finalXML = '<root>' + x2js.json2xml_str($.parseJSON(event.target.result)) + '</root>';
var finalName = event.target.files[0].name; //setting it here
$("#xmlArea").val(finalXML);
finalXML = finalXML.split('FORM3CA').join('FORM3CB');
finalXML = finalXML.split('F3CA').join('F3CB');
finalXML = finalXML.split('<CreationInfo>')[0] + '<CreationInfo><SWVersionNo>1.0</SWVersionNo><SWCreatedBy>SW20000</SWCreatedBy><JSONCreatedBy>SW20000</JSONCreatedBy><JSONCreationDate>2021-11-21</JSONCreationDate><IntermediaryCity>311</IntermediaryCity></CreationInfo>' + finalXML.split('</CreationInfo>')[1]
finalXML = finalXML.split('I_We1').join('I_We');
console.log(finalName); //here
}
reader.readAsText(event.target.files[0]);
}
document.getElementById('file').addEventListener('change', onChange);
I was suggested to use event.target.files[0].name in order to get the filename of the uploaded file (by @HeryKurniawan in comments of this post). But, when I try to console.log()the finalName variable (as you can see in above code), it shows me this error -
What is wrong in my code? I have also tried using event.target.file.name & event.target.file[0].name, but that doesn't work either. Kindly guide... Thanks! :)
2 answers
Answer question0
You are using two events that has same name event and try to use it is same scope:
$("#jsonArea").val(event.target.result); // Here is event from FileReader.onload
var finalName = event.target.files[0].name; // Here you try to use event from onChange
So you face names overwrite, that's why you get error.
To solve it, use different names:
function onChange(event) {
var reader = new FileReader();
reader.onload = (frEvent)=>{
let data = JSON.parse(frEvent.target.result);
$("#jsonArea").val(frEvent.target.result);
var finalXML = '<root>' + x2js.json2xml_str($.parseJSON(frEvent.target.result)) + '</root>';
var finalName = frEvent.target.fileName; //setting it here
$("#xmlArea").val(finalXML);
finalXML = finalXML.split('FORM3CA').join('FORM3CB');
finalXML = finalXML.split('F3CA').join('F3CB');
finalXML = finalXML.split('<CreationInfo>')[0] + '<CreationInfo><SWVersionNo>1.0</SWVersionNo><SWCreatedBy>SW20000</SWCreatedBy><JSONCreatedBy>SW20000</JSONCreatedBy><JSONCreationDate>2021-11-21</JSONCreationDate><IntermediaryCity>311</IntermediaryCity></CreationInfo>' + finalXML.split('</CreationInfo>')[1]
finalXML = finalXML.split('I_We1').join('I_We');
console.log(finalName); //here
}
reader.readAsText(event.target.files[0]);
}
document.getElementById('file').addEventListener('change', onChange);
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First of all, thank you everyone who answered/commented.
I got my desired result by doing this -
finalName = document.getElementById('file').value
Thanks a lot! :)