What is the best way to incorporate the information from my CSV file onto my website?

I am currently working on a project where I need to extract data from a CSV file and display it on my website. The idea is to use two values as x and y coordinates, similar to a graph, and retrieve the data at that specific location.

Here is the HTML code I have implemented:

<form>
    Width <input type="text" id="W">
    Height <input type="text" id="H">
    Length <input type="text" id="L">
    <button type="button" onclick="f()">Calculate</button>
    <b id="result"></b>
</form>

This is what my CSS code looks like:


function f()
{

    var L = parseInt(document.querySelector("#L").value);
    var W = parseInt(document.querySelector("#W").value);
    var H = parseInt(document.querySelector("#H").value);

    var A;
    var B;
    var calc;

    // Define the X and Y values for reference
    A = 2*(H+2)+W+5;
    B = 2*(H+2)+L+5;

    //calc = this variable will eventually store the data from the CSV file

    document.querySelector("#result").innerHTML = calc;
}

Below is an example of the data format I am working with:


   0 1 2 3 4 5 6 7 8 
   | | | | | | | | |
0--1 2 3 4 5 6 7 8 9 
1--2 3 4 5 6 7 8 9 1
2--3 4 5 6 7 8 9 1 2
3--4 5 6 7 8 9 1 2 3
4--5 6 7 8 9 1 2 3 4
5--6 7 8 9 1 2 3 4 5
6--7 8 9 1 2 3 4 5 6
7--8 9 1 2 3 4 5 6 7
8--9 1 2 3 4 5 6 7 8

In essence, my goal is to load the CSV data into an array structure similar to a 2D array. Then, using the A and B values, I aim to fetch and display the data stored at those specific locations.

Answer №1

To load a CSV file using XMLHttpRequest, also known as AJAX, or as a File Blob, you'll need to parse it before performing any calculations. This process can be quite labor-intensive.

Luckily, there are solutions available that have been developed by ingenious individuals that you can leverage. Check out for more information. You can learn how to install this library from here: https://github.com/mholt/PapaParse#install

If you prefer not to host the file somewhere and load it with AJAX, you can simply add a file input and manually submit the file, allowing PapaParse to work with the File Blob.

Add the following HTML code snippet to include a new input field:

<input type="file"
       id="csvFile"
       accept="text/csv">

Then, include the following JavaScript code block:

const fileInput = document.querySelector('#csvFile')

fileInput.addEventListener('change', () => {
  Papa.parse(fileInput.files[0], {
    complete: function(results) {
      console.log(results);

      // You can now analyze the results and perform your desired calculations
    }
  });
})

Answer №2

If you're looking for the easiest method, simply copy and paste your CSV data into a multiline string and proceed from there.

It's important to note that this approach may not be suitable for handling large CSV files.

function getByXY(x, y) {
//make sure to enclose your CSV data within backticks 
    var data = `1 2 3 4 5 6 7 8 9 
    1 2 3 4 5 6 7 8 9 
    1 2 3 4 5 6 7 8 9`;

//Split the data by new line to access each row
    let rows = a.split("\n");
// verify the delimiter used in your data - it could be commas or spaces  
    let cols = rows[x].split(",");
  // retrieve the specific value from the chosen row and column  
   let value = cols[y];
  // return the value to the calling function
  return value;
}

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