React Components Explained – codeburst

  • Something like thisimport React from ‘react’;class MyComponent extends React.Component { render () { return div This is a component /div }}class MyOtherComponent extends React.Component { render () { return ( div MyComponent / /div ) }}This way you are able to compose more complex and useful user interface for your…
  • Component’s render method return JSX which then use to create real HTML output which will be rendered in the browser.The interesting Thing about render method is that it runs every time when your component State or Props updates.
  • Let me show you a exampleimport React from ‘react’;class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; } render () { return div My name is {this.state.name} /div }}// if we render this component the output will beMy name is ManojIgnore the super(props) (out of…
  • Let’s see an example.class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; this.changeName = this.changeName.bind(this); } changeName () { this.setState({ name: “Your Name” }); } render () { return div onClick={this.changeName} My name is {this.state.name} /div }}In the above code we are telling our React…
  • You can run this code on jsFiddle here.PropsVisualise props as options that can be passed to a component to customize its functionality.For example, I have a heading component which renders a heading with subtitle.class MyHeading extends React.Component { render () { return div h1This is a heading/h1 pSubtitle/p /div }}If…

The simplest library I ever used in my life is React. As you know React is based upon component design. Everything in React is a component which makes it easy to reuse components frequently. You can…
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React Components Explained – Manoj Singh Negi – Medium

“React Components Explained” by @manojnegiwd  #reactjs #NodeJS #javascript #coding

  • Something like thisimport React from ‘react’;class MyComponent extends React.Component { render () { return div This is a component /div }}class MyOtherComponent extends React.Component { render () { return ( div MyComponent / /div ) }}This way you are able to compose more complex and useful user interface for your users.
  • Component’s render method return JSX which then use to create real HTML output which will be rendered in the browser.The interesting Thing about render method is that it runs every time when your component State or Props updates.
  • Let me show you a exampleimport React from ‘react’;class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; } render () { return div My name is {this.state.name} /div }}// if we render this component the output will beMy name is ManojIgnore the super(props) (out of the scope of this article) focus on this.state this is where our component state lives.
  • Let’s see an example.class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; this.changeName = this.changeName.bind(this); } changeName () { this.setState({ name: “Your Name” }); } render () { return div onClick={this.changeName} My name is {this.state.name} /div }}In the above code we are telling our React component to call this.changeName whenever user clicks on the div.
  • You can run this code on jsFiddle here.PropsVisualise props as options that can be passed to a component to customize its functionality.For example, I have a heading component which renders a heading with subtitle.class MyHeading extends React.Component { render () { return div h1This is a heading/h1 pSubtitle/p /div }}If I will use this component it will always render same HTML, someting like this.This is a headingsubtitleIf we use our component in this way it is not of much use right ?

The simplest library I ever used in my life is React. As you know React hit is based upon component design. Everything in React is a component which makes it easy to reuse components frequently. You…
Continue reading “React Components Explained – Manoj Singh Negi – Medium”

Thinking in React by radubrehar #javascript #reactjs via JavaScriptKicks

  • Yet the render method, the component props, and the component state are the most important things in a React app – getting a good grasp on these paves the way for productively using React in commercial apps.
  • In the above example, notice how state is updated with a new address object on every change – this avoids skipping updates when is used – which is just a React component that only re-renders when it receives new values for props and for state (it shallowly compares the old and new props objects and the old and new state objects).
  • Another powerful concept in React apps is controlled props – it basically means components don’t store any intermediate state for the controlled props (for example on updating the value inside a text input), but rather on every change, they notify the owner component of the change, so the owner can re-render the controlled component with updated values for the props.
  • The above inputs are example of controlled components (already baked into React), but basically this is the gist: uncontrolled components use their internal state to update their UI, while controlled components always show values from props.
  • And the beauty of it is that in almost no time you can become productive in building native UIs for mobile or desktop operating systems, or even for the webVR now that React is becoming widely adopted, with libraries written to target multiple platforms, but with one common way of thinking about UIs – declarative and component-based.

React is different in so many ways from its front-end predecessors. But the most different part is its way of thinking. Read on to find out more!
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My Simple React Tutorial. – Jeffrey Doyle – Medium

My Simple React Tutorial.  #webdevelopment #react #reactjs #javascript #apps #reactjs

  • In this case, a state object might look like:state = {currentTime {hour: 0, minute: 0, second: 0}, alarms: [], timeZone: ‘PST’}Say again that you’re creating a component which represents a list of items stored in a table.
  • In this case you’re going to want to store the items in the list, maybe the size of the list, and also the label the list has all inside that components state.
  • Now some developers will say that i’m storing too much inside my state object, but personally I like to keep all of the relevant data to my component inside that components state.
  • Lets explore our example of the list of items component and see what it might look like:As you can see, the state is where all of our data is stored inside our component.
  • When addItem is called and it performs the setState function on the component, the components state will change, and thus trigger the component to re-render according to the new state object, thus including the new item in the list.

React is one of the most powerful Javascript frameworks around right now, this tutorial will introduce you to React, and tell you why you need to start using it right now. Let’s face it, if you’ve…
Continue reading “My Simple React Tutorial. – Jeffrey Doyle – Medium”

React Components Explained – Manoj Singh Negi – Medium

Don't understand #ReactJS components? Get to know them with this cool guide:  #JavaScript

  • Something like thisimport React from ‘react’;class MyComponent extends React.Component { render () { return div This is a component /div }}class MyOtherComponent extends React.Component { render () { return ( div MyComponent / /div ) }}This way you are able to compose more complex and useful user interface for your users.
  • Component’s render method return JSX which then use to create real HTML output which will be rendered in the browser.The interesting Thing about render method is that it runs every time when your component State or Props updates.
  • Let me show you a exampleimport React from ‘react’;class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; } render () { return div My name is {this.state.name} /div }}// if we render this component the output will beMy name is ManojIgnore the super(props) (out of the scope of this article) focus on this.state this is where our component state lives.
  • Let’s see an example.class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; this.changeName = this.changeName.bind(this); } changeName () { this.setState({ name: “Your Name” }); } render () { return div onClick={this.changeName} My name is {this.state.name} /div }}In the above code we are telling our React component to call this.changeName whenever user clicks on the div.
  • You can run this code on jsFiddle here.PropsVisualise props as options that can be passed to a component to customize its functionality.For example, I have a heading component which renders a heading with subtitle.class MyHeading extends React.Component { render () { return div h1This is a heading/h1 pSubtitle/p /div }}If I will use this component it will always render same HTML, someting like this.This is a headingsubtitleIf we use our component in this way it is not of much use right ?

The simplest library I ever used in my life is React. As you know React is based upon component design. Everything in React is a component which makes it easy to reuse components frequently. You can…
Continue reading “React Components Explained – Manoj Singh Negi – Medium”

Testing a React-driven website’s SEO using “Fetch as Google”

Test a #ReactJS-driven website’s SEO using “Fetch as Google”:

  • Testing a React-driven website’s SEO using “Fetch as Google”
  • Given the goals, the ideal tools were create-react-app and GitHub Pages.
  • The first thing I wanted to test was whether Googlebot will not index or crawl parts of the page that are rendered asynchronously.
  • After the page has been loaded, my React app does an Ajax request for data, then updates parts of the page with that data.
  • It appears that using React Router for client-side-rendered pages is problematic in terms of search engine friendliness.

I recently tested whether client-side rendering would prevent websites from being crawled by search engine robots. As my article showed, React doesn’t seem to hurt search engine indexing at all. Now…
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Master ReactJS: Learn React JS from Scratch Udemy Coupon 50%

Master ReactJS: Learn React JS from Scratch Bywkyx4E
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@nodejs_geek: “Master ReactJS: Learn React JS from Scratch Bywkyx4E

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