New day, new article! Today’s article is about five advanced Javascript ES6 features that I like and that I think everyone (at least every developer) should understand.
Are you ready?
💡 Destructuring
Destructuring is a quick way to get values out of objects and arrays. For example, you can extract values and assign them to variables with a single line of code.
Here’s an example of how destructuring can be used with an object:
And here’s an example with an array:
As you can see, destructuring makes it simple to extract values from objects and arrays and assign them to variables.
🔒 Block Scoping
You can use block scoping to declare variables that are only available within a specific block of code. There are two ways to declare variables in JavaScript: var and let.
The var keyword declares a global or function-scoped variable, which means it can be accessed from anywhere within the same function. On the other hand, the let keyword declares a variable that is block scoped, which means that it can only be accessed within the same block of code.
Here’s an example of let-based block scoping:
As you can see, the message variable is only available within the if statement-defined block of code.
🚗 Spread Operator
Spreading the values of an array or object into a new array or object is possible with the spread operator. It’s a quick way to combine arrays or objects or to turn an array-like object into a proper array.
Here’s an example of how to combine two arrays using the spread operator:
Here’s an example of how to use the spread operator to transform an array-like object into a real array:
A spread operator is a powerful tool for simplifying and improving the readability of your code.
🔮 Template Literals
String literals that allow you to embed expressions within your strings are known as template literals. Instead of quotes (‘ or “), they are defined with the backtick (`) character.
Here’s an example of template literals in action:
As you can see, template literals make it simple to embed expressions within strings and allow you to write multi-line strings without using string concatenation.
💾 Arrow Functions
In JavaScript, arrow functions are a shorthand syntax for writing anonymous functions. They enable you to write code that is shorter, more concise, and more readable.
Here’s an example of how to use the arrow function:
As you can see, arrow functions make it simple to write anonymous functions and have a shorter syntax than regular functions.
It was a short article, but I hope it was helpful for you. I use these features daily and feel like they are crucial for every Javascript developer. So hopefully, you have discovered something new today.
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Source: https://dev.to/naubit/5-advanced-es6-features-every-javascript-developer-should-master-3mkn
