How can I manipulate binary data using typed arrays in JavaScript?

How can I manipulate binary data using typed arrays in JavaScript?

You can use typed arrays like Uint8Array, Float32Array, etc., to handle binary data efficiently. What specific manipulation do you have in mind?

I want to read binary data from a file and modify it.

You can use the File API to read the file as an ArrayBuffer, then create a typed array from it. Would you like a code example?

Yes, please provide a code example.

Sure! Here's a simple example:

const fileInput = document.getElementById('fileInput');
fileInput.addEventListener('change', (event) => {
    const file = event.target.files[0];
    const reader = new FileReader();
    reader.onload = (e) => {
        const arrayBuffer = e.target.result;
        const uint8Array = new Uint8Array(arrayBuffer);
        // Modify the data here
    };
    reader.readAsArrayBuffer(file);
});

This reads a file and creates a Uint8Array from the binary data.

How do I modify the data in the Uint8Array?

You can access and modify elements in the Uint8Array just like a regular array. For example, uint8Array[0] = 255; sets the first byte to 255.