Tips for identifying the characteristics of a mobx observer in the developer console of a web browser

Question

Tips for identifying the characteristics of a mobx observer in the developer console of a web browser

Within the project I am currently involved in, there is heavy reliance on dependency injection.

In this context, you will come across code structures similar to the following:

type BigWidget = {
   title: string,
}


const AProps = {
  b: BigWidget
}

class A extends React.Component<AProps> {
  ...
}

...
const a = <A b={observerB} />

The issue with prop b highlighted above is that it can be instantiated in various ways

import * as mobxReact from 'mobx-react';
const observerB = mboxReact.observer( { title }: { title: string } ) => {...}

or

const anotherObserverB = mboxReact.observer( { title, extraFunction }:
    { title: string, extraFunction:() => void } ) => {...}

I am seeking a way to easily identify the object being passed to prop b. Is there a straightforward method, such as checking if the observer has a prop extraFunction, available in the development console?

Currently, when I type a in the console, the displayed information is limited to just:

https://i.sstatic.net/GYgyN.png

which does not provide much insight.

typescript mobx-react

Answer 1

Answer №1

Here is a simplified version of code that will compile without errors:

export type AProps = {
  b: any
}

export class A extends React.Component<AProps> {
  render() {
    return <div />
  }
}

const observerB = observer(() => { return <div /> });

const a = <A b={observerB} />

If you want to find out the value of b passed to component A, you can access it through props:

console.log(a.props['b'] === observerB); // Returns true

Full code snippet

export type AProps = {
  b: any
}

export class A extends React.Component<AProps> {
  render() {
    return <div />
  }
}

const observerB = observer(() => { return <div /> });

const a = <A b={observerB} />
console.log(a); // Displays the content of variable 'a' 
console.log(a.props['b'] === observerB); // Returns true

Answer 2

Here is a simplified version of code that will compile without errors:

export type AProps = {
  b: any
}

export class A extends React.Component<AProps> {
  render() {
    return <div />
  }
}

const observerB = observer(() => { return <div /> });

const a = <A b={observerB} />

If you want to find out the value of b passed to component A, you can access it through props:

console.log(a.props['b'] === observerB); // Returns true

Full code snippet

export type AProps = {
  b: any
}

export class A extends React.Component<AProps> {
  render() {
    return <div />
  }
}

const observerB = observer(() => { return <div /> });

const a = <A b={observerB} />
console.log(a); // Displays the content of variable 'a' 
console.log(a.props['b'] === observerB); // Returns true

Tips for identifying the characteristics of a mobx observer in the developer console of a web browser

Answer №1

Full code snippet

Similar questions

Combining arrays of objects sharing a common key yet varying in structure

How to minimize scaffolding with Redux, React, and Typescript?

Share information by including the provider within the @component declaration in Angular

The attribute 'forEach' is not recognized on the data type 'string | string[]'

Azure function indicates a successful status despite receiving a result code of 500

Steps for converting a tsx file into a js file in React

What steps can be taken to eliminate the 404 error when refreshing an Angular 8 Single Page Application (SPA) without using

The revalidateTag and revalidatePath features in Next.js are currently not functioning as expected

Guide to importing items from a personalized library with extensive exporting

typescript What is the best approach to searching within a nested array?

Interactive Bootstrap 4 button embedded within a sleek card component, complete with a dynamic click event

What is the best way to instruct TypeScript to utilize a globally installed NPM @types package?

What causes Angular2 to detect both reference changes and primitive changes even when the OnPush flag is enabled?

Guide on converting any object with keys of type string to a generic type

Enhancing Angular2 Routing with Angular4 UrlSerializer for Seamless HATEOAS Link Integration

When trying to integrate Angular.ts with Electron, an error message occurs: "SyntaxError: Cannot use import statement

In TypeScript, it can be challenging to determine the equality between a value and an enum

What is the method for displaying script commands within package.json files?

Having trouble changing file names in a Next.js 13 project

Regular expressions that identify text located at the conclusion of a URL