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How Much JavaScript is Enough JavaScript to Learn React? 🤔

The transition from javascript to react could be tough particularly if you’re a newbie. The javascript language has lots of ideas which might take you months if not years to be taught (and never even get good at them). To be sincere, i’ve been coding in javascript and react for over 4 years, and even i do not know every part that’s there in javascript, however i can nonetheless develop full-stack apps in javascript, react and node. The excellent news is that you simply need not be taught every part in javascript so that you can begin studying react. And you’ll really proceed studying extra javascript ideas as you’re employed with react. I’m penning this put up that will help you transition to react easily and never get caught at javascript for a lot too lengthy. And if you’re good with each javascript and react I wish to hear your ideas on this matter on the dialogue part under.

1. var, let and const

These are used to declare variables in javascript. var and let could be re-assigned values whereas const is use to create fixed variables. In trendy javascript it is really useful to make use of const by default and solely use let while you explicitly have to reassign a variable. This helps in writing extra maintainable and predictable code.

2. JavaScript Knowledge Varieties

Understanding the totally different javascript information varieties have to be some of the essential idea it’s essential to perceive effectively. Nearly each line of code you’ll be writing you’ll be interacting with these information varieties. When declaring variables, manipulating information, and even whereas debugging, it’s there good to grasp them and know when to make use of them.

  • undefined – A variable declare with out being assigned a worth takes the worth of undefined by default. undefined is used to symbolize absence of a worth.
  • nullnull is assigned by the programmer to represents intentional absence of a worth.
  • boolean – Has solely two doable values, true or false
  • string – Represents a sequence of characters utilizing quotes
  • quantity – May be integers or decimal numbers
  • image and bigint – I hardly ever use them however may be helpful in some instances. symbols are sometimes used so as to add distinctive property keys to an object. bigint is used to symbolize massive numeric values.
  • objects – They retailer information in key and worth pairs.
  • arrays and capabilities – These will not be essentially varieties however particular objects. Arrays are used to retailer checklist of values whereas Features are use to write down reusable items of code/logic.

Understanding these information varieties is your very first step to changing into good at javascript.

3. JavaScript Array Strategies

Once you begin growing apps, you will discover your self largely working with checklist of information. Figuring out and understanding the totally different array strategies is important in react as a way to appropriately replace the state. A number of the strategies you may discover helpful are:

  • .map – typically use to show checklist of information in react by looping by means of them.
  • .filter – while you need to take away an merchandise/objects from a listing. essential when updating state for a delete performance
  • .discover – to get the primary component of an array that satisfies a given situation
  • .findIndex – much like .discover solely that this returns the index(place) of the merchandise as an alternative of the merchandise.
  • .scale back – used to build up values in an array. Good instance could possibly be getting the totals of a purchasing cart objects.
  • .forEach – you need to use this to loop over an array.
  • .slice – used to get a subarray(a portion of an array)
  • .push – used while you need to add an merchandise to an array

Though there are numerous different array strategies price realizing, I discover the above being largely used.

4. Objects and Array Destructuring

Destructuring is used to extract values and assign them variables in a extra readable method. In react the idea is extensively used when accessing and manipulating props and state. You may also simply assign default values to props when utilizing destructuring.

5. The Unfold Operator (…)

The unfold operator is quite common in react when including properties to an object or array and even combining objects or arrays, after which utilizing the brand new worth to replace the state.

6. Features (Common and Arrow Features)

It’s essential to perceive how one can create and work with capabilities. Features are essential in creating reusable logic that may be reused in a number of modules. Perceive the syntax and how one can cross arguments in each common and arrow capabilities. Perceive the utilization of the return assertion in a operate. Study the distinction between them, the this key phrase, the arguments object and the way the capabilities are hoisted.

7. Conditional Statements

These will let you execute totally different blocks of code primarily based on whether or not a specified situation evaluates to true or false. They embrace the if assertion, the swap assertion and the ternary operator.

8. Accessing and Manipulating the DOM

The DOM is an important a part of net improvement in JavaScript. It supplies a standardized method to work together with and manipulate the construction of net paperwork, making it doable to create dynamic and interactive net pages. Though in React you’ll not be interacting with the DOM straight, understanding how one can navigate and manipulate the DOM is key for front-end improvement.

9. JavaScript Modules

Lastly I believe you must be taught javascript modules, modules are a method to arrange code of associated performance into separate recordsdata. Modules assist enhance code maintainability, reusability, and group by permitting builders to interrupt down a big codebase into smaller, extra manageable items. In javascript, modules could be created utilizing the export and import key phrases. In React modularity is extensively tailored by making most elements as modules.

In my view, the above is sufficient javascript to begin studying React. There are various different javascript ideas not talked about above however I believe as you be taught react and work on react tasks you’ll be able to as effectively be taught extra javascript alongside the way in which.

What do you assume? Is the above javascript sufficient javascript to begin studying react?


I’m including this part to showcase my content material. I’ve a youtube channel the place I create javascript, react and different coding tutorial. My newest large course was on making a full-stack ecommerce app in Subsequent.js, it’s full and prepared on my youtube channel 🔥

Construct and Deploy a Full-Stack E-Commerce: Subsequent.js 13, React.js, Typescript, Tailwind, Prisma, Stripe


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