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Clean Code concepts adapted for JavaScript

Software engineering principles, from Robert C. Martin’s book Clean Code, adapted for JavaScript. This is not a style guide. It’s a guide to producing readable, reusable, and refactorable software in JavaScript.Not every principle herein has to be strictly followed, and even fewer will be universally agreed upon. These are guidelines and nothing more, but they are ones codified over many years of collective experience by the authors of Clean Code.

Source: ryanmcdermott/clean-code-javascript: Clean Code concepts adapted for JavaScript

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npm- Specifying dependencies and devDependencies in a package.json file

Install packages required by your application in production:

 

Install packages that are only needed for local development and testing:

NPM cheat sheet:
https://kapeli.com/cheat_sheets/npm.docset/Contents/Resources/Documents/index

Specifying dependencies and devDependencies in a package.json fileTo specify the packages your project depends on, you must list them as “dependencies” or “devDependencies” in your package’s package.json file. When you (or another user) run npm install, npm will download dependencies and devDependencies that are listed in package.json that meet the semantic version requirements listed for each. To see which versions of a package will be installed, use the semver calculator.”dependencies”: Packages required by your application in production.”devDependencies”: Packages that are only needed for local development and testing.

To specify the packages your project depends on, you must list them as "dependencies" or "devDependencies" in your package’s package.json file. When you (or another user) run npm install, npm will download dependencies and devDependencies that are listed in package.json that meet the semantic version requirements listed for each. To see which versions of a package will be installed, use the semver calculator.

  • "dependencies": Packages required by your application in production.
  • "devDependencies": Packages that are only needed for local development and testing.

Source: Specifying dependencies and devDependencies in a package.json file | npm Documentation

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mockserver – npm

mockserver is a library that will help you mocking your APIs in a matter of seconds: you simply organize your mocked HTTP responses in a bunch of mock files and it will serve them like they were coming from a real API; in this way you can write your frontends without caring too much whether your backend is really ready or not.

Source: mockserver – npm

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Javascript debugging helper – Count number of eventlisteners in Chrome console

Paste and run one of the code blocks below in chrome console to get eventlisteners count.

 

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jasmine parameterized unit test – Stack Overflow

Based on piotrek’s answer and the article Parameterized testing in Javascript, you could also use the following approach which uses ES6 syntax:

I have tested it with the Jest test framework, but it should work with Jasmine as well.

Source: jasmine parameterized unit test – Stack Overflow

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How to include and use jQuery in Angular CLI project

Tested in angular version 7:

  1. install jquery:
    npm install jquery
    install jquery typescript intellisense:
    npm install @types/jquery
  2. edit the angular.json file in root folder:
    in the architect / build / scripts location, add this:

  3. To use jquery inside a component.ts add this import at the top:
    import $ from ‘jquery’;

    Example code to check for functionality:
    component html:

    component.ts:

    Click on the button should fade out and fade in the entire page.

Source: How to include and use jQuery in Angular CLI project