I have multiple nested functions in a ES6 Class. Now I wonder how I can easily bind this of the class instance to all the subfunctions. I know of… …but it feels like an awkward solution for multiple nested functions. Does anyone know of a more elegant solution? Answer You can use arrow functions. They work in rather a similar
Tag: class
How to use React with function component and hooks ONLY?
Having a React project with some component written in Class style and some others written in Hooks styles make the newcomers confuse and harder to reuse common logic. Is there a way, for example: An alternative library like Preact, Inferno,… which compatible with React but only support hooks Or an ESLint feature that warning every time someone try to create
What’s the purpose of using classes in React?
I mostly see JavaScript use classes as a constructor as following: What’s the reason React uses classes without using the contructor() function, such as following? I don’t see classes being used to create instances. Answer What’s the reason React uses classes without using the contructor() function From the JavaScript class doc: If you do not specify a constructor method, a
What is the difference between class fields and properties in Javascript
I’m reading class fields proposal for JavaScript. I don’t understand why the authors call it ‘fields’ and not properties. MDN docs in class article speak about instance properties declared inside constructor and in next section about field declarations declared using new syntax. What is the difference between the two besides the syntax? Answer What is the difference between the two
Difference between classes and namespaces in TypeScript
What is exactly the difference between classes and namespaces in TypeScript? I know that if you create a class with static methods you can access them without instantiating the class and that is exactly one of the points of namespaces I guess. I also know that you can create more than one Namespace with the same name and their methods
JS call static method from class
I have a class with a static method: Is there an equivalent to this for static methods (i.e. refer to the current class without an instance)? So I don’t have to write the class name: “User”. Answer From MDN documentation Static method calls are made directly on the class and are not callable on instances of the class. Static methods
Use vanilla javascript to add / remove class to a different element after clicking on another one
I have looked through a number of similar questions but can not find a specific example of one that answers in vanilla JS how to add and remove a class to a different element from the one clicked on. I know it has something to do with setting up a loop and iterating through the elements, but I got lost
Re-associating an object with its class after deserialization in Node.js
I’m writing a simple serialization / deserialization framework for some application-specific objects. Consider the following: At this point, one can ask “What does d1 have that d2 lacks?” One approach that partially works is to manually assign the methods of d1 to d2: This has a couple of disadvantages. First, I have to manually assign each method of d1 to
Private properties in JavaScript ES6 classes
Is it possible to create private properties in ES6 classes? Here’s an example. How can I prevent access to instance.property? Answer Private class features is now supported by the majority of browsers.
Using `this` for Parent Function inside a Nested Function
In the Apple “classs”, how can the nested function countSeeds() retrieve the value this.price? jsfiddle: http://jsfiddle.net/VGqEa/ Output Answer put var self = this at the top of Apple, and then refer to this as self instead in the nested function. i.e.: You could also put the self=this statement at the beginning of this.cutOpen, since this will still refer to the