Delete file from file system in ionic 4 - file

Question

I am working with one application in which I am creating offline PDF and save them in file system.
Now the problem is when I delete the particular record I need to delete the PDF from file system I go through the file plugin but couldn't find any method related to that. I am using ionic 4 here are some peace of code.
if (this.plt.is('cordova')) {
this.pdfObj.getBuffer((buffer) => {
const blob = new Blob([buffer], { type: 'application/pdf' });
// Save the PDF to the data Directory of our App
this.file.writeFile(this.file.externalRootDirectory + '/Downloads/', 'ACCSYS-' +
this.randomString(4) + '-' + encodeURI(this.headerData.title) + '.pdf', blob, { replace: true }).then(fileEntry => {
// Open the PDf with the correct OS tools
setTimeout(() => {
this.hideLoader();
this.fileOpener.open(fileEntry.nativeURL, 'application/pdf');
this.pdfObj = null;
}, 1000);
});
});
} else {
setTimeout(() => {
this.hideLoader();
this.pdfObj.download();
this.pdfObj = null;
}, 500);
}
Assume I store the nativeURL in localstorage.
any idea how to delete the file ??

Answer 1

If you already have a fileEntry object you can use the remove() method to delete the file like this:
fileEntry.remove(function() {
// if the file has been successfully removed
}, function(error) {
// if there was an error removing the file
}, function() {
// if the file does not exist
});
See these links for more documentation and examples.

Answer 2

here is the perfect way to do it ( define window on the top of ts file )
delete() {
// this.fileHelper.removeFile();
const fileToRemove = this.remoteURL; // Change this with your file path
window.resolveLocalFileSystemURL( fileToRemove, (dirEntry) => {
dirEntry.remove(this.successHandler, this.errorHandler);
});
}
successHandler() {
console.log('Directory deleted successfully');
}
errorHandler() {
console.log('There is some error while deleting directory')
}