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Best 10 Code Snippets for JavaScript in 2022


A Code Snippet is a block of code you may share and reuse. By reusing protected and confirmed code, you not solely enhance your productiveness however you additionally ensure you all the time import the proper code and usually are not lacking something (e.g. lacking argument, not checking error code or exceptions).

Writing JavaScript code is kind of advanced. Whereas JavaScript is a highly regarded language, its lack of typing could make it actually exhausting to observe the code path and perceive how code really works! Sharing and utilizing vetted code patterns immediately in your IDE maximize your productiveness but additionally ensure you are utilizing the proper code block to your job!

You should use these snippets immediately in VS Code through the use of shortcuts! For every snippet, we offer a shortcut. Obtain the Codiga VS Code extension and simply sort the shortcut, as proven under.

Use Snippet Email Valid in IDE

Check if email is valid

Shortcut: .electronic mail.isvalid

This snippet checks if an electronic mail handle is legitimate utilizing a daily expression. That is usually very sophisticated to confirm an electronic mail within the frontend, which is why such a snippet is so beneficial!

Link to the snippet

Check if array is empty

Shortcut: .array.is_empty

Checking an array in JavaScript isn’t that straightforward! First, there isn’t any assure that the worth you consider is in reality an array. It is advisable to first examine this after which, examine that the size is 0.

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Profiling the execution time of a function

Shortcut: .time.profiling

When your software is gradual, it is essential to measure the execution time of perform that will take a while to execute. With this snippet, you may then measure the time it takes to execute a chunk of code. Measure the preliminary time utilizing console.time() and after your code is executed, get the elapsed time utilizing console.timeEnd().

Link to the snippet

Generate UUID

Shortcut: .uuid.generate

When your software is gradual, it is essential to measure the execution time of perform that will take a while to execute. With this snippet, you may then measure the time it takes to execute a chunk of code. Measure the preliminary time utilizing console.time() and after your code is executed, get the elapsed time utilizing console.timeEnd().

Link to the snippet

Celsius to Fahrenheit in JavaScript

Shortcut: .celsius.fahrenheit

When your software is gradual, it is essential to measure the execution time of perform that will take a while to execute. With this snippet, you may then measure the time it takes to execute a chunk of code. Measure the preliminary time utilizing console.time() and after your code is executed, get the elapsed time utilizing console.timeEnd().

Link to the snippet

Using Promise.all in JavaScript

Shortcut: .promise.all

As a substitute of getting the results of every Promise separately, it is essential to keep away from ready for every promise and as a substitute utilizing Promise.all. This may end up in vital efficiency enhancements.

Link to the snippet

Using Promise.all in JavaScript

Shortcut: .promise.all

As a substitute of getting the results of every Promise separately, it is essential to keep away from ready for every promise and as a substitute utilizing Promise.all. This may end up in vital efficiency enhancements.

Link to the snippet

Map Array in JavaScript

Shortcut: .array.map

Mapping the values of an array to a different worth is kind of tough if you don’t use map. In JavaScript, you need to use the .map perform to map the array. It takes a perform that has remodel every component of the array.

Think about you’ve gotten an inventory of numbers and also you wish to remodel it into new checklist, every component being the double of the preliminary component. You’d then use the next code.

const newArray = originalArray.map((component) => component * 2);
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Link to the snippet

Filter array in JavaScript

Shortcut: .array.filter

As for .map(), JavaScript additionally consists of the .filter() perform to filters parts of an array or checklist. The perform takes a predicate that point out if the component ought to be filtered or not.

Link to the snippet

GET/fetch request in JavaScript

Shortcut: .request.get

To difficulty a easy GET request on a URL in JavaScript, merely use the fetch perform. The then perform is chained to transform the outcome right into a JSON object you may then use and course of in your program.

Link to the snippet

POST request in JavaScript

Shortcut: .request.put up

A put up request is barely extra sophisticated than a GET request. At first, the technique argument of the fetch perform have to be set to POST. Then, the headers should additionally specify the content material is in JSON and the physique ought to be a JSON doc. The totally different .then name remodel the response right into a JSON format and the .catch name is invoked if any exception happens within the course of.

Link to the snippet

You may add your individual snippet and share them with the group utilizing code-snippets.dev and the underlying Codiga snippet engine. Create an account on app.codiga.io, login and create your recipe. Ensure you create them with the general public visibility to present all customers entry to the recipes!

  • Code Snippets search engine code-snippets.dev for looking and discovering identical reusable code.
  • Codiga for outlining your individual code snippets

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