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Some important topics of JavaScript before diving into React
A Thread
A Thread
ES6 classesAlthough new developers are working with functional components, there is a possibility that you may encounter old written class component code. So it can be helpful to learn basic of ES6 class.
Basic understanding of var, let and constYou should have the basic understanding of variable declaration. When to use var, let or const. What is the block scope and stuff like that.
for example
var x = 2;
// Here x is 2
{
let x = 4;
// Here x is 4
}
// Here x is 2
Arrow functions syntax Arrow function is a new ES6 feature that's been used almost widely in modern codebases because it keeps the code concise and readable. It allows a short syntax for writing function expressions.
Destructuring assignmentDestructuring is a convenient way of accessing multiple properties stored in objects and arrays.
Let's say:
const person = {
firstName: 'Pratham',
lastName: 'Kumar'
}
const {firstName, lastName} = person;
console.log(firstName); // Pratham
Array methods You will use Array method multiple times. So try to learn them before jumping onto React
Some commonly used functions are
- map
- filter
- reduce
- find
- findIndex
Operators - Ternary operator
- Spread operator
doYouLikeMyTweets ? "
" : "
";
Callback functionsA function passed as an argument to another function is called a callback if the function invokes the argument at a later time
You will use callbacks while working with hooks, forms, and other things
I think these are some important concepts that should be learned before React.
Did I miss something? Include below
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Did I miss something? Include below
Thanks for reading this
ALL THE BEST
