27 articles tagged with javascript.
PDF files are widely used for sharing documents because they preserve formatting across different devices. Many PDFs contain valuable images such as logos, product photos, charts, diagrams, illustrati
Not every PDF contains searchable or editable text. Many PDFs are simply scanned images of documents such as invoices, contracts, books, receipts, government forms, and handwritten notes. While these
PDF files are one of the most widely used document formats for sharing reports, invoices, contracts, books, research papers, manuals, forms, and business documents. Although viewing a PDF is simple, u
Managing dates and times in JavaScript is notoriously tricky, often leading to subtle bugs that only surface once an application hits production. To help you master this fundamental skill, the freeCod
Picture this: you hit an API endpoint, and you get an API response back. You pass the data straight into your application, and everything looks fine in development. Your mock data is clean, your types
Adding margins to a PDF is a common task when preparing documents for printing, binding, archiving, or sharing professionally. While many PDF editors include this feature, they often require installin
Have you ever tried to spot the differences between two long paragraphs of text? Reading line-by-line to find a missing word or a new sentence is a massive headache. In this tutorial, you'll build you
PDF documents come in many different page sizes. Some are designed for A4 paper, while others use Letter, Legal, Tabloid, or custom dimensions. This can create problems when printing, sharing, archivi
PDF files are often created by combining scans, exporting documents from different systems, or processing large batches of pages. In many cases, the final PDF ends up with pages arranged in the wrong
Performance tools are good at showing you what's slow. They can tell you that your Largest Contentful Paint is 4.2 seconds, your JavaScript bundle is too large, or an image below the fold is loading t
PDF files often contain unwanted margins, blank spaces, scanner borders, page headers, page footers, or unnecessary content around the main document area. Cropping allows users to remove these unwante
Ask any developer what design pattern they know best and Singleton comes up first. Ask the same group...
If you're looking to level up your front-end development skills by building a practical web utility, this is the guide for you. We'll code a fully functional Case Converter Tool from scratch using onl
A walkthrough of designing a real-time collaborative whiteboard from a blank page to a production-ready architecture.
PDF files contain more information than what appears on the page. Behind every PDF document is metadata that stores information such as the document title, author, subject, keywords, creator applicati
According to the Stack overflow technology survey in 2025, JavaScript is one of the most widely used programming languages in the world. We use it to build frontend applications, backend services, pay
PDF files often become difficult to manage when pages are out of order, scanned incorrectly, duplicated, or spread across multiple documents. Instead of manually recreating the document, users often n
When you're working with contracts, reports, invoices, manuals, or academic documents, page numbers make navigation much easier. Instead of manually editing every page, modern JavaScript libraries let
Sometimes PDF pages appear upside down, sideways, or in the wrong orientation after scanning or exporting documents. Instead of re-creating the document manually, users usually just need a quick way t
Most developers learn JavaScript by memorizing rules and copying framework patterns. But when a weird production bug hits or a senior engineer asks a deep architectural question during an interview, s
PDF watermarks are commonly used for branding, document protection, approvals, confidential files, and internal document tracking. Whether it’s adding a company logo, a “CONFIDENTIAL” label, or a draf
Whether it’s invoices, scanned documents, reports, certificates, or receipts, users often need to convert PDF pages into image files quickly. Modern browsers make this much easier than before. Instead
Whether it’s scanned documents, screenshots, receipts, notes, certificates, or multiple photos, users often need a quick way to combine images into a downloadable PDF. Modern browsers make this much e
JavaScript is famously single-threaded, yet it powers highly complex, interactive web applications without freezing up. How is this possible? The answer lies in the Event Loop. The Event Loop is a cor
PDF files are everywhere. From invoices and reports to résumés and documents, they’re one of the most common file formats we deal with. But there’s a common problem: PDFs can get large quickly. If you
Working with PDFs is part of everyday development. Sometimes you don’t need the entire document. You just need a few pages — maybe a specific section, a report summary, or selected invoice pages. Most
By Scott Gary React is a highly popular and powerful JavaScript library for user interface development. Its component-based architecture, combined with its declarative nature, is one of the primary re…
