A Simple React Tree Menu Component

React Simple Tree Menu

Inspired by Downshift, a simple, data-driven, light-weight React Tree Menu component that:

• does not depend on any UI framework
• fully customizable with render props and control props
• allows search
• supports keyboard browsing

Check Storybook Demo.

Usage

Install with the following command in your React app:

npm i react-simple-tree-menu
// or
yarn add react-simple-tree-menu

To generate a TreeMenu, you need to provide data in the following structure.

// as an array
const treeData = [
  {
    key: 'first-level-node-1',
    label: 'Node 1 at the first level',
    ..., // any other props you need, e.g. url
    nodes: [
      {
        key: 'second-level-node-1',
        label: 'Node 1 at the second level',
        nodes: [
          {
            key: 'third-level-node-1',
            label: 'Last node of the branch',
            nodes: [] // you can remove the nodes property or leave it as an empty array
          },
        ],
      },
    ],
  },
  {
    key: 'first-level-node-2',
    label: 'Node 2 at the first level',
  },
];
// or as an object
const treeData = {
  'first-level-node-1': {               // key
    label: 'Node 1 at the first level',
    index: 0, // decide the rendering order on the same level
    ...,      // any other props you need, e.g. url
    nodes: {
      'second-level-node-1': {
        label: 'Node 1 at the second level',
        index: 0,
        nodes: {
          'third-level-node-1': {
            label: 'Node 1 at the third level',
            index: 0,
            nodes: {} // you can remove the nodes property or leave it as an empty array
          },
        },
      },
    },
  },
  'first-level-node-2': {
    label: 'Node 2 at the first level',
    index: 1,
  },
};

And then import TreeMenu and use it. By default you only need to provide data. You can have more control over the behaviors of the components using the provided API.

import TreeMenu from 'react-simple-tree-menu';
...
// import default minimal styling or your own styling
import '../node_modules/react-simple-tree-menu/dist/main.css';
// Use the default minimal UI
<TreeMenu data={treeData} />

// Use any third-party UI framework
<TreeMenu
  data={treeData}
  onClickItem={({ key, label, ...props }) => {
    this.navigate(props.url); // user defined prop
  }}
  initialActiveKey='first-level-node-1/second-level-node-1' // the path to the active node
  debounceTime={125}>
    {({ search, items }) => (
        <>
          <Input onChange={e => search(e.target.value)} placeholder="Type and search" />
          <ListGroup>
            {items.map(props => (
              // You might need to wrap the third-party component to consume the props
              // check the story as an example
              // https://github.com/iannbing/react-simple-tree-menu/blob/master/stories/index.stories.js
              <ListItem {...props} />
            ))}
          </ListGroup>
        </>
    )}
</TreeMenu>

If you want to extend the minial UI components, they are exported at your disposal.

// you can import and extend the default minial UI
import TreeMenu, { defaultChildren, ItemComponent } from 'react-simple-tree-menu';

// add custom styling to the list item
<TreeMenu data={treeData}>
    {({ search, items }) => (
        <ul>
            {items.map(({key, ...props}) => (
              <ItemComponent key={key} {...props} />
            ))}
        </ul>
    )}
</TreeMenu>

// add a button to do resetOpenNodes
<TreeMenu data={treeData}>
    {({ search, items, resetOpenNodes }) => (
      <div>
        <button onClick={resetOpenNodes} />
        {defaultChildren({search, items})}
      </div>
    )}
</TreeMenu>

Keyboard browsing

When the tree menu is focused, you can use your keyboard to browse the tree.

• UP: move the focus onto the previous node
• DOWN: move the focus onto the next node
• LEFT: close the current node if it has children and it is open; otherwise move the focus to the parent node
• RIGHT: open the current node if it has children
• ENTER: fire onClick function and set activeKey to current node

Note the difference between the state active and focused. ENTER is equivalent to the onClick event, but focus does not fire onClick.

API

TreeMenu

props	description	type	default
data	Data that defines the structure of the tree. You can nest it as many levels as you want, but note that it might cause performance issue.	{[string]:TreeNode}	TreeNodeInArray[]
activeKey	the node matching this key will be active. Note that you need to provide the complete path (e.g. node-level-1/node-level-2/target-node).	string	‘’
focusKey	the node matching this key will be focused. Note that you need to provide the complete path (e.g. node-level-1/node-level-2/target-node)	string	‘’
initialActiveKey	set initial state of activeKey. Note that you need to provide the complete path (e.g. node-level-1/node-level-2/target-node).	string	-
initialFocusKey	set initial state of focusKey. Note that you need to provide the complete path (e.g. node-level-1/node-level-2/target-node).	string	-
onClickItem	A callback function that defines the behavior when user clicks on an node	(Item): void	console.warn
debounceTime	debounce time for searching	number	125
openNodes	you can pass an array of node names to control the open state of certain branches	string[]	-
initialOpenNodes	you can pass an array of node names to set some branches open as initial state	string[]	-
locale	you can provide a function that converts label into string	({label, …other}) => string	({label}) => label
hasSearch	Set to false then children will not have the prop search	boolean	true
matchSearch	you can define your own search function	({label, searchTerm, …other}) => boolean	({label, searchTerm}) => isVisible
disableKeyboard	Disable keyboard navigation	boolean	false
children	a render props that provdes two props: search, items and resetOpenNodes	(ChildrenProps) => React.ReactNode	-

TreeNode

props	description	type	default
label	the rendered text of a Node	string	‘’
index	a number that defines the rendering order of this node on the same level; this is not needed if data is TreeNode[]	number	-
nodes	a node without this property means that it is the last child of its branch	{[string]:TreeNode}	TreeNode[]
…other	User defined props	any	-

TreeNodeInArray

props	description	type	default
key	Node name	string	-
label	the rendered text of a Node	string	‘’
nodes	a node without this property means that it is the last child of its branch	{[string]:TreeNode}	TreeNode[]
…other	User defined props	any	-

Item

props	description	type	default
hasNodes	if a TreeNode is the last node of its branch	boolean	false
isOpen	if it is showing its children	boolean	false
level	the level of the current node (root is zero)	number	0
key	key of a TreeNode	string	-
label	TreeNode label	string	-
…other	User defined props	any	-

ChildrenProps

props	description	type	default
search	A function that takes a string to filter the label of the item (only available if hasSearch is true)	(value: string) => void	-
searchTerm	the search term that is currently applied (only available if hasSearch is true)	string	-
items	An array of TreeMenuItem	TreeMenuItem[]	[]
resetOpenNodes	A function that resets the openNodes, by default it will close all nodes. activeKey is an optional parameter that will highlight the node at the given path. focusKey is also an optional parameter that will set the focus (for keyboard control) to the given path. Both activeKey/focusKey must be provided with the complete path (e.g. node-level-1/node-level-2/target-node). activeKey will not highlight any nodes if not provided. focusKey will default to activeKey if not provided.	(openNodes: string[], activeKey?: string, focusKey?: string) => void	[],‘’,‘’

TreeMenuItem

props	description	type	default
hasNodes	if a TreeNode is the last node of its branch	boolean	false
isOpen	if it is showing its children	boolean	false
openNodes	an array of all the open node names	string[]	-
level	the level of the current node (root is zero)	number	0
key	key of a TreeNode	string	-
parent	key of the parent node	string	-
searchTerm	user provided search term	string	-
label	TreeNode label	string	-
active	if current node is being selected	boolean	-
focused	if current node is being focused	boolean	-
onClick	a callback function that is run when the node is clicked	Function	-
toggleNode	a function that toggles the node (only availavble if it has children)	Function	-
…other	User defined props	{[string]: any}	-

Download Details:

Author: iannbing

Live Demo: https://iannbing.github.io/react-simple-tree-menu/

GitHub: https://github.com/iannbing/react-simple-tree-menu

#reactjs #javascript

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How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

• Performance: It delivers optimal performance.
• Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
• UI design: React Native enables you to design simple and responsive UI for your mobile app.
• 3rd party plugins: This framework supports 3rd party plugins.
• Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

• Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
• Near-native user experience: React Native provides several native components, and these are platform agnostic.
• The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

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Android Menu - Steps to implement Menu in Android - DataFlair

Types of Android Menu

Let us see the various types of menu in Android:

1. Android Options Menu

The Options Menu is a collection of options for an activity. It has a set of items that are useful to perform actions. It helps us to combine multiple actions together.

Following is an example of Options Menu:

2. PopUp Menu

Pop-Up menu is a menu that displays a list of items in a popup window. A pop-up menu appears below the view by default, in case there is no space, it appears above it.

3. Contextual Menu

A contextual menu is a floating menu. It appears only when the users long-press an element or right clicks on that. It generally affects the selected element.

#android tutorials #android menu #android menu types #contextual menu #menu android #menu in android #options menu #types of menu in android

Build a simple React Native Pokemon app with React-Navigation

As we start learning new technologies we want to start building something or work on a simple project to get a better understanding of the technology. So, let’s build this simple app.
For this app, we will be using PokeApi to get our pokemon data, and also we will be using Hooks. I am using pokemondb for pokemon sprites. It’s just a personal preference you can use whatever you want.

#react-native #react-native-app #react-navigation #react-native-development #react

How to Select and Hire the Best React JS and React Native Developers?

Since March 2020 reached 556 million monthly downloads have increased, It shows that React JS has been steadily growing. React.js also provides a desirable amount of pliancy and efficiency for developing innovative solutions with interactive user interfaces. It’s no surprise that an increasing number of businesses are adopting this technology. How do you select and recruit React.js developers who will propel your project forward? How much does a React developer make? We’ll bring you here all the details you need.

What is React.js?

Facebook built and maintains React.js, an open-source JavaScript library for designing development tools. React.js is used to create single-page applications (SPAs) that can be used in conjunction with React Native to develop native cross-platform apps.

React vs React Native

• React Native is a platform that uses a collection of mobile-specific components provided by the React kit, while React.js is a JavaScript-based library.
• React.js and React Native have similar syntax and workflows, but their implementation is quite different.
• React Native is designed to create native mobile apps that are distinct from those created in Objective-C or Java. React, on the other hand, can be used to develop web apps, hybrid and mobile & desktop applications.
• React Native, in essence, takes the same conceptual UI cornerstones as standard iOS and Android apps and assembles them using React.js syntax to create a rich mobile experience.

What is the Average React Developer Salary?

In the United States, the average React developer salary is $94,205 a year, or $30-$48 per hour, This is one of the highest among JavaScript developers. The starting salary for junior React.js developers is $60,510 per year, rising to $112,480 for senior roles.

* React.js Developer Salary by Country

• United States- $120,000
• Canada - $110,000
• United Kingdom - $71,820
• The Netherlands $49,095
• Spain - $35,423.00
• France - $44,284
• Ukraine - $28,990
• India - $9,843
• Sweden - $55,173
• Singapore - $43,801

In context of software developer wage rates, the United States continues to lead. In high-tech cities like San Francisco and New York, average React developer salaries will hit $98K and $114per year, overall.

However, the need for React.js and React Native developer is outpacing local labour markets. As a result, many businesses have difficulty locating and recruiting them locally.

It’s no surprise that for US and European companies looking for professional and budget engineers, offshore regions like India are becoming especially interesting. This area has a large number of app development companies, a good rate with quality, and a good pool of React.js front-end developers.

As per Linkedin, the country’s IT industry employs over a million React specialists. Furthermore, for the same or less money than hiring a React.js programmer locally, you may recruit someone with much expertise and a broader technical stack.

How to Hire React.js Developers?

• Conduct thorough candidate research, including portfolios and areas of expertise.
• Before you sit down with your interviewing panel, do some homework.
• Examine the final outcome and hire the ideal candidate.

Why is React.js Popular?

React is a very strong framework. React.js makes use of a powerful synchronization method known as Virtual DOM, which compares the current page architecture to the expected page architecture and updates the appropriate components as long as the user input.

React is scalable. it utilises a single language, For server-client side, and mobile platform.

React is steady.React.js is completely adaptable, which means it seldom, if ever, updates the user interface. This enables legacy projects to be updated to the most new edition of React.js without having to change the codebase or make a few small changes.

React is adaptable. It can be conveniently paired with various state administrators (e.g., Redux, Flux, Alt or Reflux) and can be used to implement a number of architectural patterns.

Is there a market for React.js programmers?
The need for React.js developers is rising at an unparalleled rate. React.js is currently used by over one million websites around the world. React is used by Fortune 400+ businesses and popular companies such as Facebook, Twitter, Glassdoor and Cloudflare.

Final thoughts:

As you’ve seen, locating and Hire React js Developer and Hire React Native developer is a difficult challenge. You will have less challenges selecting the correct fit for your projects if you identify growing offshore locations (e.g. India) and take into consideration the details above.

If you want to make this process easier, You can visit our website for more, or else to write a email, we’ll help you to finding top rated React.js and React Native developers easier and with strives to create this operation

#hire-react-js-developer #hire-react-native-developer #react #react-native #react-js #hire-react-js-programmer

 Component Life Cycle in React

Every component in React goes through a lifecycle of events. You can think is of going through a cycle of birth, growth, and death the same as the picture below.

The phases are:

• Initialization — Starting the journey of your component
• Mounting — Birth of your component
• Update — Growth of your component
• Unmount — Death of your component

1. Initialization

This is the phase in which the component is going to start its journey. The developer has to define the props and initial state of the component. This is usually done inside the constructor method (see below to understand the initialization phase better).

#react #react-lifecycle-method #react-course #react-for-beginner #react-js-tutorials