I have a csv file which I need to validate. here is the function:
let reader = new FileReader();
reader.onload = function (e) {
let resultFile = e.target.result
let value = this.validateFile((<String>resultFile).split('\n'))
if (value != "valid") {
errors += value;
return errors;
}
}
I need to do some validation inside the function validateFile.
validateFile(data) {
if ((fileLength <= batchProp.MAX_SUBREQUESTS_WITH_OFFERS && this.includeOffers) || (fileLength <= batchProp.MAX_SUBREQUESTS_WITHOUT_OFFERS && !this.includeOffers)) {
if (!this.checkUploadedFile(data, fileLength)) {
this.lastRowWasValid = true;
}
}
}
But I keep getting this error:
Property 'validateFile' does not exist on type 'FileReader'.
Please suggest how to fix this.
You need to use a arrow function to access the global scope which has the validateFile function
let reader = new FileReader();
reader.onload = function (e) => {
let resultFile = e.target.result
let value = this.validateFile((<String>resultFile).split('\n'))
if (value != "valid") {
errors += value;
return errors;
}
}