The course is part of this learning path
This module looks at how to work with External Data in React. You’ll be looking at Class Components, Effect Hooks, and how to handle data.
Learning Objectives
The objectives of this module are to provide you with an understanding of:
- The component lifecycle
- Hooks in React
- How to create restful services
- How to use an Effect Dependency Array
- How to hand errors in data requests
- How to send data
Intended Audience
This learning path is aimed at all who wish to learn how to use the ReactJS framework.
Prerequisites
It is essential you understand the face of contemporary web development to attend this course. We insist upon JavaScript experience, along with good HTML and CSS skills.
Feedback
We welcome all feedback and suggestions - please contact us at qa.elearningadmin@qa.com to let us know what you think.
- [Instructor] State Hook allows local state to be added to a function component. UseState is the Hook and it takes an argument of the initial state. The function returns an array as the current state is the first element and a function to update value is the second. We did construct this array to declare the state, providing the names of the state and the updating function. It's usual for the updating function to have a prefix of set before the state's name. Remember, state should never be mutated directly, just updated using its update it function. Calling the update it function is the equivalent of calling Set State in a class component. It causes the component to re-render with the new state value. We're allowed to have more than one state Hook in a component. They should all be declared immediately inside the components function body. State can be any valid JavaScript value, including strings, billions, numbers, res and objects. The code here shows several States declared in a component.
Ed is an Outstanding Trainer in Software Development, with a passion for technology and its uses and holding more than 10 years’ experience.
Previous roles have included being a Delivery Manager, Trainer, ICT teacher, and Head of Department. Ed continues to develop existing and new courses, primarily in web design using: PHP, JavaScript, HTML, CSS, SQL, and OOP (Java), Programming Foundations (Python), and DevOps (Git, CI/CD, etc). Ed describes himself as practically minded, a quick learner, and a problem solver who pays great attention to detail.
Ed’s specialist area is training in Emerging Technologies, within Web Development. Ed mainly delivers courses in JavaScript covering vanilla JS, ES2015+, TypeScript, Angular, and React (the latter is authored by Ed) and has delivered on behalf of Google for PWAs. Ed has also developed a new suite of PHP courses and has extensive experience with HTML/CSS and MySQL.
Ed is responsible for delivering QA’s Programming Foundations course using the Eclipse IDE. His skillset extends into the DevOps sphere, where he is able to deliver courses based around Agile/Scrum practices, version control, and CI/CD.