This lightweight, zero-dependency function handles data extraction, proper character escaping, and browser download triggers. javascript
Instead of encoding the entire CSV string into a long data:text/csv;charset=utf-8,... URI string (which can crash browsers if the table has thousands of rows), this script uses Blob and URL.createObjectURL() . This approach generates a unique local pointer to the browser memory, offering high performance for large datasets. download table as csv javascript
If a table cell contains a comma (e.g., Mechanical Keyboard, RGB ), the CSV parser will break it into two separate columns. To prevent this, the function wraps any cell containing a comma, double quote, or newline in double quotes. Any pre-existing internal double quotes are escaped by doubling them ( "" ). 2. Solving the Excel Formatting Issue (BOM) This approach generates a unique local pointer to
When opening raw UTF-8 encoded CSV files in older versions of Microsoft Excel, special characters or non-English alphabets often display as corrupted text. Adding the Byte Order Mark ( \uFEFF ) at the beginning of the Blob forces Excel to recognize the file as UTF-8 immediately. 3. Memory Optimization with URL.createObjectURL Any pre-existing internal double quotes are escaped by
This lightweight, zero-dependency function handles data extraction, proper character escaping, and browser download triggers. javascript
Instead of encoding the entire CSV string into a long data:text/csv;charset=utf-8,... URI string (which can crash browsers if the table has thousands of rows), this script uses Blob and URL.createObjectURL() . This approach generates a unique local pointer to the browser memory, offering high performance for large datasets.
If a table cell contains a comma (e.g., Mechanical Keyboard, RGB ), the CSV parser will break it into two separate columns. To prevent this, the function wraps any cell containing a comma, double quote, or newline in double quotes. Any pre-existing internal double quotes are escaped by doubling them ( "" ). 2. Solving the Excel Formatting Issue (BOM)
When opening raw UTF-8 encoded CSV files in older versions of Microsoft Excel, special characters or non-English alphabets often display as corrupted text. Adding the Byte Order Mark ( \uFEFF ) at the beginning of the Blob forces Excel to recognize the file as UTF-8 immediately. 3. Memory Optimization with URL.createObjectURL