November 8, 2023
FileReader API for client-side operations or Node.js modules like
fs for server-side processing. This guide walks you through the implementation details for both environments.
Understanding the FileReader API
FileReader API is designed for reading file contents from the user's computer. It is asynchronous and works with callback functions to handle the file data once it is read.
Reading a CSV file on the client-side
Node.js 'fs' and 'readline' modules
For server-side operations, Node.js provides the
fs module to read files and the
readline module to handle them line by line.
Reading a CSV file on the server-side
Parsing CSV with a library
PapaParse for more advanced features like auto-detection of delimiters.
Using PapaParse to read a CSV file
Remember to include the
PapaParse library in your HTML or install it via npm for Node.js environments.
Handling CSV with headers
If your CSV has headers, you'll want to map those headers to the values in each row.
Mapping headers to values
This function converts a CSV string into an array of objects, with each object representing a row and the headers as keys.
How to Truncate Date in MySQL