Are you a web developer looking to implement file downloading functionality on your website? Look no further! In this guide, we will walk you through the process of downloading files in JavaScript using the Fetch API.
Step 1: Setting up your HTML
First, make sure to have a button or link in your HTML that triggers the download process. For example, .
Step 2: Writing the JavaScript logic
Next, write the JavaScript logic to handle the file download when the button is clicked. Use the Fetch API to make a GET request to the file URL and then handle the response.
Here's an example code snippet:
const downloadBtn = document.getElementById('downloadBtn');
downloadBtn.addEventListener('click', async () => {
try {
const response = await fetch('https://example.com/file.pdf');
const blob = await response.blob();
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = 'file.pdf';
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
} catch (error) {
console.error('Error downloading the file', error);
}
});
Step 3: Handling the file response
In the JavaScript logic, we use the Fetch API to make a GET request to the file URL. When the response is received, we convert it to a blob using response.blob(). Then, we create a URL for the blob using window.URL.createObjectURL(). After that, we create a link () element with the download attribute set to the desired file name. Finally, we trigger a click event on the link to download the file.
