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fileDownload(blob, filename) {
		const reader = new FileReader()
		reader.readAsDataURL(blob);
		reader.onload = e => {
			const a = document.createElement('a');
			var reg = /^["](.*)["]$/g;
			a.download = decodeURI(filename.replace(reg, '$1')); 

			a.href = this.dataURIToBlob(e.target.result); 
			document.body.appendChild(a);
			a .click();
			document.body.removeChild(a);
		};
	},