log ( 4 / ) The right-hand side of an arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type. JavaScript’s equality operator ( =) coerces its arguments, leading to unexpected behavior:Ĭonsole. To summarize, we have a language that was designed for quick uses, and then grew to a full-fledged tool to write applications with millions of lines.Įvery language has its own quirks - oddities and surprises, and JavaScript’s humble beginning makes it have many of these. There are many developers these days that use only JavaScript to program their entire stack! The “run anywhere” nature of JS makes it an attractive choice for cross-platform development. More than this, JS has become popular enough to be used outside the context of browsers, such as implementing JS servers using node.js. This is long and gradual growth of “the web”, starting as a simple network of static pages, and evolving into a platform for rich applications of all kinds. On modern websites, your browser is frequently running applications that span hundreds of thousands of lines of code. Web browser developers responded to this increased JS usage by optimizing their execution engines (dynamic compilation) and extending what could be done with it (adding APIs), which in turn made web developers use it even more. Over time, though, JS became more and more popular, and web developers started using it to create interactive experiences.
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JavaScript (also known as ECMAScript) started its life as a simple scripting language for browsers.Īt the time it was invented, it was expected to be used for short snippets of code embedded in a web page - writing more than a few dozen lines of code would have been somewhat unusual.ĭue to this, early web browsers executed such code pretty slowly. The relationship between TypeScript (TS) and JavaScript (JS) is rather unique among modern programming languages, so learning more about this relationship will help you understand how TypeScript adds to JavaScript. You’ve probably already heard that TypeScript is a “flavor” or “variant” of JavaScript. JS Graphics JS Graphics JS Canvas JS Plotly JS Chart.js JS Google Chart JS D3.Congratulations on choosing TypeScript as one of your first languages - you’re already making good decisions! JS vs jQuery jQuery Selectors jQuery HTML jQuery CSS jQuery DOM JS JSON JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON Server JSON PHP JSON HTML JSON JSONP JS AJAX AJAX Intro AJAX XMLHttp AJAX Request AJAX Response AJAX XML File AJAX PHP AJAX ASP AJAX Database AJAX Applications AJAX Examples JS Web APIs Web API Intro Web Forms API Web History API Web Storage API Web Worker API Web Fetch API Web Geolocation API JS Browser BOM JS Window JS Screen JS Location JS History JS Navigator JS Popup Alert JS Timing JS Cookies JS HTML DOM DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM Forms DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists JS Async JS Callbacks JS Asynchronous JS Promises JS Async/Await JS Classes Class Intro Class Inheritance Class Static JS Functions Function Definitions Function Parameters Function Invocation Function Call Function Apply Function Bind Function Closures JS Objects Object Definitions Object Properties Object Methods Object Display Object Accessors Object Constructors Object Prototypes Object Iterables Object Sets Object Maps Object Reference JS Versions JS Versions JS 2009 (ES5) JS 2015 (ES6) JS 2016 JS 2017 JS 2018 JS IE / Edge JS History JS Tutorial JS HOME JS Introduction JS Where To JS Output JS Statements JS Syntax JS Comments JS Variables JS Let JS Const JS Operators JS Arithmetic JS Assignment JS Data Types JS Functions JS Objects JS Events JS Strings JS String Methods JS String Search JS String Templates JS Numbers JS Number Methods JS Arrays JS Array Methods JS Array Sort JS Array Iteration JS Array Const JS Dates JS Date Formats JS Date Get Methods JS Date Set Methods JS Math JS Random JS Booleans JS Comparisons JS If Else JS Switch JS Loop For JS Loop For In JS Loop For Of JS Loop While JS Break JS Iterables JS Sets JS Maps JS Typeof JS Type Conversion JS Bitwise JS RegExp JS Errors JS Scope JS Hoisting JS Strict Mode JS this Keyword JS Arrow Function JS Classes JS Modules JS JSON JS Debugging JS Style Guide JS Best Practices JS Mistakes JS Performance JS Reserved Words
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