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La propiedad 'validateFile' no existe en el tipo 'FileReader'

Tengo un archivo csv que necesito validar. aquí está la función:

 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; } }

Necesito hacer alguna validación dentro de la función 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; } } }

Pero sigo recibiendo este error:

La propiedad 'validateFile' no existe en el tipo 'FileReader'.

Por favor, sugiera cómo arreglar esto.

about 4 years ago · Juan Pablo Isaza
1 answers
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Debe usar una función de flecha para acceder al alcance global que tiene la función validateFile

 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; } }
about 4 years ago · Juan Pablo Isaza Report
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