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Javascript

Creating Pure Functional Component using React Memo

How to create Pure Component in React? A functional component that we are modifying as Pure component:- import React from ‘react’; import Tabs from ‘../Tabs’; import ‘./RightPanel.scss’; const RightPanel = () => ( <div className=”rightPanelCta”> <div className=”tab”> <Tabs> <div header=”Index.jsx”> You are on Index.jsx file </div> <div header=”Panel.jsx”> You are on Panel.jsx file </div> </Tabs> […]

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Javascript

Working example of React Ref api

What is React Ref? Its another way of communicating with react components apart from “state” and “props” (Ref = creating reference of element). We need it to access the element node, to perform special type of events like “focusing a input element”, text selection. How React Ref works? After React 16.3, it came in the […]

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Javascript

Fix lint errors in Angular cli

The mind, once stretched by a new idea, never regains its original dimensions. Problem:- In Angular cli after executing the command ng lint shows a lot of lint errors based on the configuration `tslint.json`, how to fix lint errors ? Solution:- Run the below command tslint –fix src/**/*.ts -t verbose Note:– It will fix most of the […]

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Javascript

Removing git tags before publishing

How we can remove npm/git tags before publishing:- git tag -d tagName git push origin :refs/tags/tagName Example:- ➜ git:(master) ✗ npm version patch v19.3.2 ➜ git:(master) git tag -d v19.3.2 Deleted tag ‘v19.3.2’ (was 7d16814)

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Javascript

Using JS to add div elements dynamically

Scenario:- Legacy code thrown at you with new UX design, and you cannot touch the original code. So doing latest UI changes is headache. Solution:- Play with the structure of the html and add latest flexbox or grid CSS to make your life hell easier. How i did re-structuring was appending new parent div, which […]

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Javascript React

How to debug jest test cases(React)?

Adding test cases to your code always helps in the long run, today we’re going to talk about how to debug test cases. Do something today that your future self will thank you for Using our all-time favorite Console.log it(‘should call touch & asyncValidate methods’, () => { const component = shallow( <TrialRegistrationForm handleSubmit={mockHandleSubmit} pristine […]

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Javascript

Console.log trick for debugging

Why need see our debug messages bigger and brighter, simply use the below trick. console.log(‘%c This is my log for debugging’, ‘font-size: 40px; color: green;’); “Striving for excellence motivates you; striving for perfection is demoralizing.”  

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Javascript

How to update node to a given version

Scenario:- Update node to the given version ? Solution:-  Using nvm:-Node Version Manager Install nvm  curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.8/install.sh | bash Reopen the terminal Check nvm is installed by typing nvm > enter > it will show nvm commands nvm install Node_Version_i_Want $ nvm install 8.9.4 Note:- After installing the latest node incase your build fails […]

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Javascript

Working with prettier in Visual studio code

“Whenever you are confronted with an opponent, conquer them with love.” What is prettier ? In layman terms its an handy tool that will format our code against some set standards, default formatting rules to achieve consistent code style. How to install prettier  in VS Code? Search > Prettier – Code formatter Note:- Incase you have […]

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Javascript

Most Useful Git commands

I have decided to stick with love. Hate is too great a burden to bear. List all the branches : git branch Pull the recent changes: git pull Create a feature branch : git checkout -b <new branch name> <parent branch name> Delete branch local: git branch -d <branch-name> or git branch -D <branch-name> Delete […]