In Javascript, we can add a property to an object with:
obj.property = value;
However, sometimes we would like to have fine-grained control over properties.
With Object.defineProperty(), we can decide:
| Descriptor | Purpose | Default |
|---|---|---|
| value | Property value | undefined |
| writable | Whether the property can be assigned | false |
| get | Getter of the … |
Javascript is a prototype-based object-oriented programming language. Unlike the conventional class-based object-oriented programming languages (e.g. C++ or Java), which ask programmers to write a class and then instantiate several similar objects from the class, Javascript adopts a different approach. In the world of Javascript, we have to craft a …
It is easy to write a hello world program in Node.js:
console.log("Hello world!")
However, due to the asynchronous nature of Javascript, reading inputs and writing outputs are less straight-forward. We have to pass the callback functions or register event listeners.
For example, to read some …
It is common to organize the code in several modules when we are developing
Javascript applications. In Node.js ecosystem, we can import a module with
the require() function and export symbols by adding them to the
module.exports object. On the other hand, ES2015 adds import
statements and export …
ECMAScript 2015 (also known as ES2015 or informally ES6) is the latest standard for JavaScript. It has been released for a while. However, V8, the JavaScript engine for Node.js, has only limited ES2015 support. As of writing, according to ECMAScript 6 compatibility table, the feature coverage of each Javascript …
