jQuery for Absolute Beginners : From Beginning to Advanced/free

  jQuery for Absolute Beginners : From Beginning to Advanced

Description

Our students review about this course --

"Best course to get started with jQuery, Thankyou :) " -- Vipinraj KT

"It is easy to understand for beginners in JQuery. Simple and clear explanation." -- Irina Zakharova

"taking everything into the details and steps by steps, I love the course so far" -- Maher Mahbouby

"Loved this course. I had zero knowledge on jQuery and now I just love it!" -- Sachin Satish Pai

"I loved this course, it will definitely help me complete my second year of my FdSc Computing course. Thank you" -- Daryl Sturman

"That is really good course not just for learning new, but also reviewing jquery." -- Mirnaghi Aghazada

jQuery is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML. It is free, open-source software using the permissive MIT License. Web analysis indicates that it is the most widely deployed JavaScript library by a large margin.

Mastering jQuery will boost up your career especially in web development. This course is designed you to master yourself in jQuery through step by step process. 

Course Contents 

jQuery Intro

• What is jQuery and what you will learn?

• Downloading jQuery 

jQuery Basics

• A first look at jQuery code 

• Selectors and Filters 

• Replacing contents 

• Handling events 

• Hide/Show events 

• Fading 

• Slide 

• Toggle 

• Animate

• Selectors 

• Filters 

jQuery Advanced

• Advanced Selectors

• Creating Content 

• Creating Content: Part 2

• Inserting content 

• Modifying content 

• Modifying CSS 

• Final thoughts

Bonus Lecture: HTML5 Basics

• Introduction to HTML

• HTML4 vs. HTML5

• Making your first HTML page

• Tools to create HTML files

• Base HTML Tags

• Paragraph Tags

• Break Tags

• Header Tags

• Bold and Italic Tags

• Ordered and unordered Lists

Who this course is for:

• Who wanna expert in client side web development
• Who wanna expert in jQuery

The complete React basics 101 course for beginners 2021

What is this course about?
The Complete React JS Course  - Basics to Advanced this course is a complete guide for React JS. Here, you will learn all the concepts required for becoming a front-end React JS developer. If you are new to web development or a professional developer who's creating websites with plain old javascript or jQuery, this is your time to learn React JS and take your web development skills to the next level and impress your recruiter or clients.

React JS is gaining rapid popularity. In a very short time, it has become the most widely accepted web development JavaScript library. This is the right time for you to learn and add React JS to your skillset and excel in your career.

This course is designed in a way that anyone can understand the journey from the basics to advanced concepts of React with simple explanations by the instructor along with hands-on assignments and projects.

In the first part of this course:

• We cover what is React JS, how it uses JSX, how the compilation is done behind the scenes using babel to browser understandable plain old HTML, CSS, and javascript.

• After that, we explain 'components' which are the basic building blocks of a web page while working with React JS. We also cover the stateless and stateful components and when to use those components as well.

  
  

In the next section, we learn how to create modules in React JS and how to import or export those modules to other files so that we can reuse the same set of code.

In the following section, we will work on how do we style the components using CSS modules and how to create a nice user-friendly mobile responsive website.

We also cover how to work with props, how to pass data from stateful to stateless components, and how to pass functions from one component to another component.

We explain the different lifecycle methods of a React Component and how we can access and modify the data between these lifecycles using the various lifecycle methods available to us.

We will keep on adding more videos to the course as we are creating them. These videos will be available to you soon.

Who's teaching you in this course?

I am a Computer Science graduate highly rated instructor with a rating of 4.3 and more than 200k students on Udemy, I have been part of the corporate circle since his college days. In my early days, I was part of a startup team delivering production grid android apps. Currently, I am a lead developer at EdYoda. I’m responsible for the entire front-end development & integration with the back-end. React, Python, Django is my areas of expertise. I have been delivering corporate training for Android, React, Javascript, Python & Django. I have an eye for detail & that makes me suited for delivering a finished product. I’m a fitness freak & working out is the favorite thing to do in my spare time.

I want everyone to enjoy the learning process and I have shared my knowledge that will be helpful for React developers.

State and Lifecycle

This page introduces the concept of state and lifecycle in a React component. You can find a detailed component API reference here.

Consider the ticking clock example from one of the previous sections. In Rendering Elements, we have only learned one way to update the UI. We call ReactDOM.render() to change the rendered output:

function tick() {
  const element = (
    <div>
      <h1>Hello, world!</h1>
      <h2>It is {new Date().toLocaleTimeString()}.</h2>
    </div>
  );
  ReactDOM.render(    element,    document.getElementById('root')  );}

setInterval(tick, 1000);

Try it on CodePen

In this section, we will learn how to make the Clock component truly reusable and encapsulated. It will set up its own timer and update itself every second.

We can start by encapsulating how the clock looks:

function Clock(props) {
  return (
    <div>      <h1>Hello, world!</h1>      <h2>It is {props.date.toLocaleTimeString()}.</h2>    </div>  );
}

function tick() {
  ReactDOM.render(
    <Clock date={new Date()} />,    document.getElementById('root')
  );
}

setInterval(tick, 1000);

Try it on CodePen

However, it misses a crucial requirement: the fact that the Clock sets up a timer and updates the UI every second should be an implementation detail of the Clock.

Ideally we want to write this once and have the Clock update itself:

ReactDOM.render(
  <Clock />,  document.getElementById('root')
);

To implement this, we need to add “state” to the Clock component.

State is similar to props, but it is private and fully controlled by the component.

Converting a Function to a Class

You can convert a function component like Clock to a class in five steps:

1. Create an ES6 class, with the same name, that extends React.Component.
2. Add a single empty method to it called render().
3. Move the body of the function into the render() method.
4. Replace props with this.props in the render() body.
5. Delete the remaining empty function declaration.

class Clock extends React.Component {
  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.props.date.toLocaleTimeString()}.</h2>
      </div>
    );
  }
}

Try it on CodePen

Clock is now defined as a class rather than a function.

The render method will be called each time an update happens, but as long as we render <Clock /> into the same DOM node, only a single instance of the Clock class will be used. This lets us use additional features such as local state and lifecycle methods.

Adding Local State to a Class

We will move the date from props to state in three steps:

1. Replace this.props.date with this.state.date in the render() method:

class Clock extends React.Component {
  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>      </div>
    );
  }
}

2. Add a class constructor that assigns the initial this.state:

class Clock extends React.Component {
  constructor(props) {
    super(props);
    this.state = {date: new Date()};  }

  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>
      </div>
    );
  }
}

Note how we pass props to the base constructor:

  constructor(props) {
    super(props);    this.state = {date: new Date()};
  }

Class components should always call the base constructor with props.

3. Remove the date prop from the <Clock /> element:

ReactDOM.render(
  <Clock />,  document.getElementById('root')
);

We will later add the timer code back to the component itself.

The result looks like this:

class Clock extends React.Component {
  constructor(props) {    super(props);    this.state = {date: new Date()};  }
  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>      </div>
    );
  }
}

ReactDOM.render(
  <Clock />,  document.getElementById('root')
);

Try it on CodePen

Next, we’ll make the Clock set up its own timer and update itself every second.

Adding Lifecycle Methods to a Class

In applications with many components, it’s very important to free up resources taken by the components when they are destroyed.

We want to set up a timer whenever the Clock is rendered to the DOM for the first time. This is called “mounting” in React.

We also want to clear that timer whenever the DOM produced by the Clock is removed. This is called “unmounting” in React.

We can declare special methods on the component class to run some code when a component mounts and unmounts:

class Clock extends React.Component {
  constructor(props) {
    super(props);
    this.state = {date: new Date()};
  }

  componentDidMount() {  }
  componentWillUnmount() {  }
  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>
      </div>
    );
  }
}

These methods are called “lifecycle methods”.

The componentDidMount() method runs after the component output has been rendered to the DOM. This is a good place to set up a timer:

  componentDidMount() {
    this.timerID = setInterval(      () => this.tick(),      1000    );  }

Note how we save the timer ID right on this (this.timerID).

While this.props is set up by React itself and this.state has a special meaning, you are free to add additional fields to the class manually if you need to store something that doesn’t participate in the data flow (like a timer ID).

We will tear down the timer in the componentWillUnmount() lifecycle method:

  componentWillUnmount() {
    clearInterval(this.timerID);  }

Finally, we will implement a method called tick() that the Clock component will run every second.

It will use this.setState() to schedule updates to the component local state:

class Clock extends React.Component {
  constructor(props) {
    super(props);
    this.state = {date: new Date()};
  }

  componentDidMount() {
    this.timerID = setInterval(
      () => this.tick(),
      1000
    );
  }

  componentWillUnmount() {
    clearInterval(this.timerID);
  }

  tick() {    this.setState({      date: new Date()    });  }
  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>
      </div>
    );
  }
}

ReactDOM.render(
  <Clock />,
  document.getElementById('root')
);

Try it on CodePen

Now the clock ticks every second.

Let’s quickly recap what’s going on and the order in which the methods are called:

1. When <Clock /> is passed to ReactDOM.render(), React calls the constructor of the Clock component. Since Clock needs to display the current time, it initializes this.state with an object including the current time. We will later update this state.
2. React then calls the Clock component’s render() method. This is how React learns what should be displayed on the screen. React then updates the DOM to match the Clock’s render output.
3. When the Clock output is inserted in the DOM, React calls the componentDidMount() lifecycle method. Inside it, the Clock component asks the browser to set up a timer to call the component’s tick() method once a second.
4. Every second the browser calls the tick() method. Inside it, the Clock component schedules a UI update by calling setState() with an object containing the current time. Thanks to the setState() call, React knows the state has changed, and calls the render() method again to learn what should be on the screen. This time, this.state.date in the render() method will be different, and so the render output will include the updated time. React updates the DOM accordingly.
5. If the Clock component is ever removed from the DOM, React calls the componentWillUnmount() lifecycle method so the timer is stopped.

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