Ensure you set the responseType to 'blob' so Angular treats the data as raw binary instead of JSON. typescript
Angular 2 - Download File form Rest API (CSV) - Stack Overflow
Once you receive the blob, you create a temporary URL for it and use a hidden anchor ( ) tag to initiate the download. typescript download a csv file in angular
Downloading a CSV file in Angular is a common requirement for data-heavy applications, such as reporting dashboards or inventory management systems. Depending on where your data lives, you can either from a JSON array or download a ready-made file from a server . 1. Downloading CSV from a Server API
If you already have data in a JSON format (e.g., from a previously loaded table), you can convert it to a CSV string and download it without making another server request. Manual Conversion Utility Ensure you set the responseType to 'blob' so
convertToCSV(data: any[]): string { const header = Object.keys(data[0]).join(','); const rows = data.map(obj => Object.values(obj).join(',')); return [header, ...rows].join('\r\n'); } downloadLocalData(data: any[]) { const csvContent = this.convertToCSV(data); const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' }); const url = URL.createObjectURL(blob); const link = document.createElement('a'); link.setAttribute('href', url); link.setAttribute('download', 'exported_data.csv'); link.click(); URL.revokeObjectURL(url); } Use code with caution. 3. Recommended Libraries
This is the most secure and efficient method for large datasets. You use Angular's HttpClient to fetch the file as a and then trigger a browser download. Step 1: Set up the Service Depending on where your data lives, you can
For complex needs like handling special characters, custom headers, or large files, third-party libraries can simplify the process: