Web

Make a div fill remaining screen height after variable header using CSS Grid (auto 1fr) or Flexbox (flex:1). Ditch tables for modern layout. Nested % heights work, full examples & pitfalls explained.

Vertically center text inside a div with CSS. Use Flexbox, Grid, or line-height and table-cell fallbacks for reliable css vertical align across modern browsers.

Prevent SQL injection in PHP: use prepared statements (PDO/MySQLi), validate and whitelist input, use least-privilege DB accounts, hash passwords, and test.

Learn what the npm install --save flag does: how it records packages in package.json dependencies, how npm 5+ changed behavior and when to use --save-dev.

Complete guide to importing Yes/No custom attributes in Magento 2.4.8-p3 using CSV. Learn the correct format, troubleshooting tips, and configuration for filtering and promotions.

Learn to use .htaccess for blocking Russian IP addresses on educational sites. Implement GeoIP blocking, IP deny lists, custom 403 messages like 'This material/link is not available in the Russian Federation', and server-side link hiding for compliance.

Fix JavaScript SVG text editor issues where formatting applies to entire elements instead of selections. Use tspan for partial styling, prevent text collapse, with step-by-step code using Selection API.

Check element visibility in jQuery with :visible/:hidden or .is(). Toggle with .hide(), .show(), .toggle() or .toggleClass(). Tips for animation & accessibility

Discover key differences between JavaScript function declarations and function expressions. Explore hoisting, pros, cons, var function() {} vs function name() {}, and real-world use cases for better coding.

Understand HTTP POST vs PUT differences: POST for server-assigned resource creation in collections (non-idempotent), PUT for client-specified URI creation/replacement (idempotent). REST API best practices, RFC guidance, and examples.

Learn the most efficient way to deep clone objects in JavaScript with structuredClone(). Beats JSON.parse(JSON.stringify()) on speed, handles circular refs. Compare Lodash cloneDeep, performance benchmarks, and best practices for js clone object.

Learn how to get a Unix timestamp in JavaScript using Date.now() for milliseconds or Math.floor(Date.now() / 1000) for seconds. Covers js get timestamp, conversions, Node.js examples, pitfalls, and helper functions for accurate date and time representation.

Learn javascript date format for '10-Aug-2010' using manual mapping, Intl.DateTimeFormat, or date-fns. Covers js date to string format functions, js string to date parsing, date string javascript examples, and locale-aware options.

Learn to loop through arrays in JavaScript with for loops, for...of (Java enhanced for equivalent), and forEach. Examples, comparisons, sparse arrays handling, and best practices for iteration.

Learn how to get the full current URL in JavaScript using window.location.href and document.URL. Capture on page load, parse parts like protocol, host, pathname, search, hash with examples and pitfalls.

Learn javascript delete operator, Reflect.deleteProperty, object rest/spread to remove properties. Examples for js delete object, js delete object property, js object delete key without mutating.