Web Developer Notes
In this blog you will find articles about web development in general, including topics related to JavaScript, HTML and CSS, PHP, and WordPress. Occasionally, I also publish a few articles outside the web development field — for example, posts about radio and related topics.
The site contains various code examples, plugins, and practical tips that may be useful for developers. All plugins published on this blog are available for free download. Most of the articles are based on my personal experience gained while working on commercial web development projects. My goal is to document practical solutions, interesting cases, and useful techniques that I encounter during real-world development.
Medium Wave Radio (MW / MF)
Last updated: 29.03.2026
Views: 99
Medium wave (MW) is a radio band that is intermediate between long and short waves. Different designations are used in different languages and contexts.
MW (Medium Wave) - English designation
СВ - Russian designation ("средние волны")
MF (Medium Frequency) - official designation of the band according to the ITU classification
PO (Petites Ondes) - French designation
In technical docu...
Step Options Plugin for WordPress
Last updated: 25.03.2026
Views: 361
At some point, I needed a way to display identical content blocks across multiple pages, with the ability to manage and update them easily from the WordPress admin panel.
The simplest solution would be to use a standard HTML widget. However, this approach quickly becomes inconvenient, especially when you need something more structured or reusable.
An ideal solution would be to use Advanced C...
Classic WordPress widget (plugin) of NBU exchange rates (Ukraine)
Last updated: 24.03.2026
Views: 104
WP Currency NBU - classic NBU (National Bank of Ukraine) exchange rate widget for WordPress. The widget displays the USD (US Dollar), EUR (Euro), PLN (Polish Zloty) exchange rate. You can configure the output of a particular currency independently through the admin panel. For example, if you do not need the output of the Polish zloty, you can hide it using the settings in the admin panel. The plug...
Longwave Radio (LW / LF)
Last updated: 29.03.2026
Views: 149
Longwave (LW) is a radio frequency band characterized by very low frequencies and extremely long wavelengths. Depending on the language and technical context, you may encounter different abbreviations:
LW (Long Wave) — common English-language term
LF (Low Frequency) — official ITU classification
ДВ — Russian abbreviation (“Long Waves”)
GO (Grandes Ondes) — French term
In technical...
Working with Cookies in JavaScript
Last updated: 09.02.2026
Views: 120
Сookie (web cookie or browser cookie) is a string of information that can be stored in a browser and sent to the server.
The maximum size for one cookie is 4096 bytes. The number of cookies for one domain can be from 20 to 242, depending on the browser.
Cookies are written as a string, but on a key-to-value basis.
[js]document.cookie = "username=John Brown";[/js]
Cookies may contai...