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AbortController: ending unnecessary asynchronous work
The controller sends a signal to an operation that supports termination. The interface must distinguish the denied action from an unexpected error.
Published22 Oct 2026
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Fetch API: sending a request and checking the response
A response does not necessarily mean a successful HTTP status. Fetch requires a separate status check and body reading in the expected format.
Published22 Oct 2026
Technology
async and await: readable sequence for asynchronous steps
wait waits for a result in the current async function. This syntax makes it easy to read, but does not eliminate the need to define dependencies and error behavior.
Published22 Oct 2026
Technology
Promise: how JavaScript describes a future result
Promise represents the completion of an asynchronous operation with a result or error. Chains help to describe dependent steps consistently.
Published22 Oct 2026
Technology
Events in the browser: how the interface reacts to action
The listener associates an event with a function. A separate solution is whether to cancel the standard browser action.
Published22 Oct 2026
Technology
DOM: the object tree behind the web page
DOM presents the document as linked nodes that the program can read and modify. The difference between text and HTML is important when updating content.
Published22 Oct 2026
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SRI: checking that an external file is the expected version
Subresource Integrity compares the downloaded resource to a predefined cryptographic hash. When updating the file, the expected value must also be updated.
Published22 Oct 2026
Technology
CSP: rules for the resources that the page loads
Content Security Policy allows the site to limit resource sources. The Report-Only mode helps to monitor rules before enforcement.
Published22 Oct 2026
Technology
CORS: when the browser allows reading from another origin
CORS is a mechanism with HTTP headers to access from browser code to resources of other origin. It does not replace user authentication.
Published22 Oct 2026
Technology
HTTP/3 and QUIC: change in web transport
HTTP/3 retains the meaning of HTTP on QUIC transport. Individual streams and different connection organization explain why this is more than a number change.
Published22 Oct 2026
Technology
HTTP/2: many messages exchanged in one connection
HTTP/2 changes the transmission of HTTP messages while retaining the known methods and statuses. Multiplexing helps several exchanges use a common link.
Published22 Oct 2026
Technology
HTTPS and TLS: what protects the encrypted connection
Encryption keeps the exchange on the network, and the certificate connects the connection to the domain. These are different tasks that need to work together.
Published22 Oct 2026