How we can access the State from our Vuex store from within our components, both directly and with the help of Getters.

The splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place.

Components are reusable blocks of code that can have both structure and functionality. They help create a more modular and maintainable codebase.

How to communicate from a child component up to its parent. Our product component will be able to tell its parent, the root instance, that an event has occurred, and send data along with that event notification.

The properties on the Vue instance that calculate a value rather than store a value.

How to dynamically style our HTML by binding data to an element’s style attribute, as well as its class.

How to listen for DOM events that we can use to trigger methods

How to display lists onto our webpages with Vue

Uncovering how to conditionally display elements with Vue

Explore ways you can connect data to the attributes of your HTML elements

How to use Vue to display data onto a webpage

Vue.js is an open-source JavaScript framework for building user interfaces and single-page applications.

In the last few years, Vue.js has grown from a relatively unknown framework to the fastest growing JavaScript framework of all time.

PWAs are web apps developed using a number of specific technologies and standard patterns to allow them to take advantage of both web and native app features.

With the help of Sarah Drasner, Taylor Otwell, Thorsten Lünborg and many others from the Vue.js community, Evan You tells the story of how he fought against the odds to bring Vuejs to life.

You can change, add, or remove fonts by editing the theme.fontFamily section of your Tailwind config.

Mobile first using block and flex display with tailwind

Install esm module to use ES6/import in gatsby-node

The right way to add Tailwind CSS to a Gatsby.js React Application, using Post CSS and Purge CSS.

Should you use vanilla CSS (no framework), a component framework like Bootstrap or a utility framework like Tailwind CSS?

Verify the total amount after the quantity updated in the shopping cart

Dotenv is a zero-dependency module that loads environment variables from a .env file into process.env.

A developer tool to generate, edit and inspect relative xpath, absolute xpath, CSS selectors, linkText and partialLinkText.

An alias of .should()

Cypress relies on many best-of-breed open source testing libraries (such as Mocha, Chai, Chai-jQuery, Sinon, and Sinon-Chai) to lend stability and familiarity to the platform

Cypress assertions are automatically retried until they pass or time out.

Given the number of players and available courts, calculate the maximum number of parallel tennis games

A solid test generally covers 3 phases including "set up the application state", "take an action", and "make an assertion about the resulting application state".

Get the DOM element containing the text. DOM elements can contain more than the desired text and still match.

The querying behavior of this command matches exactly how $(…) works in jQuery.

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Find the minimal perimeter of any rectangle whose area equals N

A good use case for writing automated end-to-end tests is asserting accessibility with cypress-axe, a Cypress plugin that incorporates the axe accessibility testing API

Starts server, waits for URL, then runs test command; when the tests end, shuts down server

Find the maximal sum of any double slice

Cypress offers several different timeout values based on the type of command.

To begin using MongoDB, connect a mongo shell to the running instance. From a new terminal, issue the command mongo.

How Gatsby used E2E tests to increase pull-request acceptance velocity

What makes Cypress unique from other testing tools is that commands automatically retry their assertions.

An assignment operator assigns a value to its left operand based on the value of its right operand.

Find a maximum sum of a compact subsequence of array elements

This is the big secret of Cypress that Commands are Promises.

Cypress leverages jQuery’s powerful selector engine to help make tests familiar and readable for modern web developers

Given a log of stock prices compute the maximum possible earning

Check whether array A is a permutation

Set up Cypress in your Dev Environment

This workshop will show you the flaws in your current testing strategies and how to most effectively test your applications using Cypress

In this talk, learn how to create an effective plan for testing a React and Redux application from the ground up.

Dr. Hsu 許醫師鑽研新時代思想20幾年，尤偏愛賽斯；同時從事身心靈整體健康研究，對於癌症的治療及預防復發上有獨到心得。

Find an index of an array such that its value occurs at more than half of indices in the array

N voracious fish are moving along a river. Calculate how many fish are alive.

Cover “Manhattan skyline” using the minimum number of rectangles

Determine whether a given string of parentheses (multiple types) is properly nested

Determine whether a given string of parentheses (single type) is properly nested

Paul Jarvis - The Company Of One Mindset, Rethinking Growth In Business

Pull requests are the way we contribute to group projects or open source projects.

Compute the number of intersections in a sequence of discs

Maximize A[P]*A[Q]*A[R] for any triplet (P,Q,R)

Find the minimal nucleotide from a range of sequence DNA

With JavaScript, methods and properties are also available to primitive values, because JavaScript treats primitive values as objects when executing methods and properties.

JavaScript has only one type of number. Numbers can be written with or without decimals.

The Complete Freelance Web Developer Guide. Luke Ciciliano is a web developer who writes on issues relevant to freelancers and other developers starting their own business.

When you're shipping websites and apps, one of the most important things is that they look right to the people using them.

Calculate the values of counters after applying all alternating operations

Find the minimal average of any slice containing at least two elements

Find the smallest positive integer that does not occur in a given sequence

How can we design an application architecture that is more resilient to change in the first place? How can we defend against entropy in a system where people are pushing changes every day?

Get Started with TypeScript, learn the Basics, its Features, Workflows and how to use it!

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All JavaScript objects inherit properties and methods from a prototype.

Binary search is much faster with Time Complexity of O(logN) whereas linear search algorithm works in O(N) time complexity.

The algorithm divides the array in two halves, recursively sorts them and finally merges the two sorted halves.

Quicksort is a comparison algorithm that, on average, runs in O(n log n), or linearithmic, time.

Compute number of distinct values in an array

Find the earliest time when a frog can jump to the other side of a river

Count the number of passing cars on the road

Determine whether a triangle can be built from a given set of edges

Arrays are list-like objects whose prototype has methods to perform traversal and mutation operations.

The sort() method sorts the elements of an array in place and returns the sorted array.

The Set object lets you store unique values of any type, whether primitive values or object references.

Find longest sequence of zeros in binary representation of an integer.

Rotate an array to the right by a given number of steps

Count the minimal number of jumps that the small frog must perform to reach its target.

An array A consisting of N different integers is given. The array contains integers in the range [1..(N + 1)], which means that exactly one element is missing.

find value that occurs in odd number of elements

Find the minimal difference between the sum of two splitted array parts

Math is a built-in object that has properties and methods for mathematical constants and functions.

This tutorial for List components in React gives you a step by step walkthrough on how to render a list of simple primitives, how to render a list of complex objects, and how to update the state of your list in React.

The font-family property should hold several font names as a "fallback" system, to ensure maximum compatibility between browsers/operating systems.

Basic concepts of flexbox

The whole idea behind custom hooks is just so that we can extract component logic into reusable functions.

how to style images using CSS

Netlify Functions Examples with Gatsby

Netlify helps developers quickly roll out static websites. In this in-depth Netlify course for beginners, you will learn how to use the service for everything needed in modern web development, from local setup to global deployment.

JSON objects are surrounded by curly braces {} and written in key/value pairs.

A common use of JSON is to exchange data to/from a web server. When sending data to a web server, the data has to be a string.

The Fetch API provides an interface for fetching resources (including across the network).

Turning the Static Dynamic - Gatsby + Netlify Functions + Netlify Identity

The adjacent sibling combinator (+) separates two selectors and matches the second element only if it immediately follows the first element, and both are children of the same parent element.

A styled button with ripple effect which provides the visual feedback when users tap a button.

A styled button using keyframes to control the intermediate steps in a CSS animation sequence.

Hover effects inform users what they can interact with by providing visual feedback on buttons. But there’s a problem — hover effects are for desktop apps, not mobile apps.

What's happening when we float something with CSS, and how clears work with floats.

Top 10 commonly Asked JavaScript Interview Questions and its possible answers.

A pseudo-class is a selector that selects elements that are in a specific state. Pseudo-elements behave in a similar way, however they act as if you had added a whole new HTML element into the markup, rather than applying a class to existing elements.

The transform property applies a 2D or 3D transformation to an element. This property allows you to rotate, scale, move, skew, etc., elements.

CSS animations make it possible to animate transitions from one CSS style configuration to another.

Track, update and demonstrate my beautiful websites

NPM packages for Open Source typefaces — making it easier to self-host webfonts

CSS Grid Layout excels at dividing a page into major regions or defining the relationship in terms of size, position, and layer, between parts of a control built from HTML primitives. Flexbox is a one-dimensional layout method for laying out items in rows or columns. Items flex to fill additional space and shrink to fit into smaller spaces.

The display property specifies the display behavior (the type of rendering box) of an element.

If you’re familiar with React class lifecycle methods, you can think of useEffect Hook as componentDidMount, componentDidUpdate, and componentWillUnmount combined.

According to the W3C spec the definition for one rem unit is equal to the computed value of font-size on the root element. When specified on the font-size property of the root element, the rem units refer to the property’s initial value.

A truly simple animation library for React, React Native, and Vue

If everything in Linux is a file, there has to be more to it than just files on your hard drive. This tutorial will show you how to use lsof to see all the other devices and processes that are being handled as files.

About one-third of U.S. workers are freelancers. Are you ready to join them on the freelance train? There are a few things you should know first.

Use graphQL to retrieve images from a subdirectory and run auto display in a SlideShow Component

After you’ve made a query, you can pass additional options to the gatsby-image component.

How to create and use a Styled Component, How to modify your CSS conditionally with props, How to create Global Styling.

Gatsby ships with a built-in ESLint setup. For most users, our built-in ESlint setup is all you need. If you know however that you’d like to customize your ESlint config e.g. your company has their own custom ESlint setup, this shows how this can be done.

The process of writing about something forces me to learn it better.

A quick reference to add dark/ligt switch with styled components, react toggle component, and gatsby-styled-components-dark-mode plugin

The position property specifies the type of positioning method used for an element (static, relative, fixed, absolute or sticky). Learning how CSS positioning works will make your future projects much easier to lay out.

There’s a special syntax to work with promises in a more comfortable fashion, called “async/await”.

AJAX (Asynchronous JavaScript And XML) allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes.

It’s also possible to use an “unstructured data” approach in Gatsby sites, no GraphQL required.

Learn the basics of how the web works with HTTP, HTML, and CSS.

In this complete and practical guide, we will look at just about every technology in web development.

iPhone 11 Tips, Tricks & Hidden Features + IOS 13

Learn the foundations of computer science in this course. This video is lecture 0 of Harvard University's CS50 2018 course.

A Hook is a special function that lets you “hook into” React features. For example, useState is a Hook that lets you add React state to function components.

This AWS full course will help you understand what is AWS (Amazon Web Services), how did AWS become so successful, the services that AWS provides, the future of AWS and a demonstration on deploying a web application in AWS.

Sass lets you use features that do not exist in CSS, like variables, nested rules, mixins, imports, inheritance, built-in functions, and other stuff.

Her true story will radically alter your current beliefs about yourself, your purpose on earth, your health, your relationships, and your life!

React 16.8.0 is the first release to support Hooks. When upgrading, don’t forget to update all packages, including React DOM. React Native supports Hooks since the 0.59 release of React Native.

The map & filter methods create new arrays with the results of calling a provided function on every element in the calling array.

Interested in making money with a website so you can earn an income online?

A quick reference to the Markdown syntax

Destructuring assignment is a cool feature that came along with ES6. Destructuring is a JavaScript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables.

What Happens to Your Body When You Fast - Hour by Hour Breakdown

JavaScript variables can belong to the local or global scope. Global variables can be made local (private) with closures.

Function expressions can be made "self-invoking". A self-invoking expression is invoked (started) automatically, without being called.

Hoisting is JavaScript's default behavior of moving declarations to the top of the current scope

Regular expressions are patterns used to match character combinations in strings.

This web dev roadmap will help guide you in deciding what technology and languages you should learn about in 2020.

Lints + Fixes React via eslint-config-airbnb

禁食才是最有效的醫法 (Dr Liu's show with English subtitles)

Web pages can be viewed using many different devices including desktops, tablets, and phones. Your web page should look good, and be easy to use, regardless of the device.

CSS name-to-hex mapping

Include popular icons in your React projects easly with react-icons, which utilizes ES6 imports that allows you to include only the icons that your project is using.

The modern React world is moving quickly to adopt the CSS in JS philosophy and Styled Components is one of the libraries leading the charge.

Seven meals for a week & Enjoy hunger with ultimate health

Use the Human Knot as an icebreaker to build communication, collaboration, critical thinking, and creativity.

Gatsby themes open up a lot of incredible opportunities, and theme-ui might just be the perfect tool for making themes composable, interoperable, and even more powerful.

A pragma is a compiler directive. It tells the compiler how it should handle the contents of a file. JSX syntax on its own isn’t readable by the browser. In order to ship something readable to the browser, JSX needs to be converted to plain JavaScript.

Gatsby Themes are the Next Big Thing™ for building web sites and apps.

Your portfolio is your resume, business card, first impression, a place to learn & experiment, and a place where you can show off.

For the past four years, the blog had been running on WordPress. It was as fast, as custom, and as free of plugins as I could possibly make it, but WordPress is cumbersome, and there’s only so fast and pleasant to use you can make it.

Learn how to make a PROFESSIONAL website with WordPress, step by step!

Your iPhone running iOS 13.2 experiencing poor battery life? Has your battery gone from great to terrible? Here's what you need to know to diagnose and fix the problem.

Bootstrap includes a wide range of shorthand responsive margin and padding utility classes to modify an element’s appearance.

You may have already seen or worked on a JAMstack site! They do not have to include all attributes of JavaScript, APIs, and Markup. They might be built using by hand, or with Jekyll, Hugo, Nuxt, Next, Gatsby, or another static site generator...

Dr. Hsu 許醫師鑽研新時代思想20幾年，尤偏愛賽斯；同時從事身心靈整體健康研究，對於癌症的治療及預防復發上有獨到心得。

Keynote speech by Kyle Mathews, CEO and co-founder of Gatsby, from the Gatsby Days London conference on Sept. 30th, 2019 at the Congress Centre.

This is a custom description for SEO and Open Graph purposes, rather than the default generated excerpt. Simply add a description field to the frontmatter.

This is a custom description for SEO and Open Graph purposes, rather than the default generated excerpt. Simply add a description field to the frontmatter.