Responding in Streaming Mode

In this example, the Fetch API is called to fetch a remote jQuery.js resource, and the resource is sent to a client in streaming mode in response to a request from the client.

Sample Code

async function handleRequest(request) {
const response = await fetch('https://static.cloudcachetci.com/qcloud/main/scripts/release/common/vendors/jquery-3.2.1.min.js');

if (response.status !== 200) {
return response;

// Generate readable streams and writeable streams.
const { readable, writable } = new TransformStream();
// Respond to the client in streaming mode.

return new Response(readable, response);

addEventListener('fetch', event => {

Sample Preview

In the address bar of the browser, enter a URL that matches a trigger rule of the edge function to preview the effect of the sample code.