What is TypeScript and why should I use it instead of JavaScript ...
Converting from JavaScript to TypeScript. Any .js file can be renamed to a .ts file and ran through the TypeScript compiler to get syntactically the same JavaScript code as an output (if it was …
javascript - When should I use ?? (nullish coalescing) vs || (logical ...
The ?? operator was added to TypeScript 3.7 back in November 2019. And more recently, the ?? operator was included in ES2020 , which is supported by Node 14 (released in April 2020). …
What does the !! (double exclamation mark) operator do in …
The exception for TypeScript? If myObject was an any, you're back in JavaScript's Wild West and can return it without !!, even if your return type is a Boolean. Keep in mind that these are JSX …
In TypeScript, what is the ! (exclamation mark / bang) operator …
Feb 16, 2017 · Similar to type assertions of the forms <T>x and x as T, the ! non-null assertion operator is simply removed in the emitted JavaScript code. I find the use of the term "assert" a …
javascript - Why use triple-equal (===) in TypeScript? - Stack …
Jul 20, 2019 · TypeScript cannot redefine == without breaking all JavaScript code that relies on its behavior (despite this having sad implications for 3). This also implies that TypeScript cannot …
Calling properly TypeScript code from JavaScript
Oct 17, 2014 · Consuming TypeScript from JavaScript is the same as consuming TypeScript from TypeScript, or JavaScript from JavaScript for that matter. For example, let's say you have a …
What does ${} (dollar sign and curly braces) mean in a string in ...
Mar 7, 2016 · Example added. Reference was in a coding challenge but it was a given, as if it was something you just use. Hadn't seen anything on it and couldn't find anything eit
javascript - Interface type check with Typescript - Stack Overflow
Jan 20, 2013 · Due to the "scope" of TypeScript, I believe there won't be such a statement even in the future. Another different between object is type and object instanceof class is that, type in …
typescript - What does the "as" keyword do? - Stack Overflow
Jan 27, 2022 · This is a Typescript operator, it's not available in ECMAScript 2015 (latest release of Javascript) As the answers above indicated, the 'as' operator is a form of Type Assertion. …
javascript - What does the construct x = x || y mean ... - Stack …
May 10, 2010 · In JavaScript if you don't pass in a parameter, it defaults to a null value. Also in JavaScript if your variable is a null value it is considered to be false by the logical operators. …