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JavaScriptで ごく普通にhttp通信をする 〜esp8266+espruinoでhttp getリクエストをするテスト〜
The document discusses HTML5 and its features. It provides an overview of the history and development of HTML5. It describes several key HTML5 APIs and features including offline storage, multimedia, graphics and 3D, real-time connectivity, device access, semantics, and CSS3 styling. It also discusses polyfills that can be used to enable HTML5 features in older browsers and lists some resources fo
The document discusses techniques for writing clean JavaScript code. It provides examples of code smells and improvements to address issues like attaching events from the outside, separating selection from logic, shallow scope, overwriting default behavior, and separating logic from views. The document advocates for practices like modularizing functions, separating DOM manipulation from models, an
This document discusses HTML5 geolocation APIs. It provides code examples for using the geolocation API to get a user's current position and display it on a map. It explains how geolocation works using GPS, IP address, and WiFi networks. It also demonstrates drawing the user's location on a map and watching for position changes.
The document discusses how JavaScript engines have improved performance over time. It explains that early JavaScript engines in 2006 used interpreters which were slow due to overhead from boxing and unboxing values. Modern engines in 2011 use just-in-time (JIT) compilers to generate fast machine code, and techniques like inline caching (IC) and type specialization to optimize property access and e
オフラインWebアプリの再到来で今、再び注目されるAPIの本命 ーJavaScript SQL-like database
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