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JavaScript ArrayBuffer, binary arrays

1. Overview In web-development we meet binary data mostly while dealing with files (create, upload, download). Another typical use case is image processing. That’s all […]
JavaScript The clickjacking attack

The “clickjacking” attack allows an evil page to click on a “victim site” on behalf of the visitor. Many sites were hacked this way, including Twitter, […]
JavaScript Cross-window communication

The “Same Origin” (same site) policy limits access of windows and frames to each other. The idea is that if a user has two pages […]
JavaScript Popups and window methods

1. Overview A popup window is one of the oldest methods to show additional document to user. Basically, you just run: …And it will open […]
JavaScript Event loop: microtasks and macrotasks

Browser JavaScript execution flow, as well as in Node.js, is based on an event loop. Understanding how event loop works is important for optimizations, and sometimes […]
JavaScript Selection and Range

In this chapter we’ll cover selection in the document, as well as selection in form fields, such as <input>. JavaScript can access an existing selection, select/deselect […]

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