What is a Stateless Functional Component in React
What is a Stateless Functional Component?
A stateless component is one that can recive data and render it, but it does not manage the provided data or track changes to it.
This method creates a javascript function that returns JSX or null. Which is also known as a component or JSX component (or a react component?).
React also requires that you start the function name with a Capital Letter, which seems very picky.
So you cant have a function called myFunction it has to be called MyFunction.
When testing this i could not get it to render properly, as i think you have to call the function within < and > according to this document.
so rather than this to render the MyComponent function
ReactDOM.render(MyComponent, document.getElementById('root'))
it becomes this
ReactDOM.render(<MyComponent />, document.getElementById('root'))
just testing this using the react browser tools, and it registers as a component!
HTML
<div id="root"></div>Scripts
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/18.0.0-alpha-5fa4d79b0-20211008/umd/react.production.min.js" integrity="sha512-5PVmWGoNJocWPdQJmJd1aRbz3cFcFgXctWKLWcitqtgX64jF+ttfg9g2oLltmeQ1HUo3gT6QchaMK3h+S+JG4Q==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/18.0.0-alpha-5fa4d79b0-20211008/umd/react-dom.production.min.js" integrity="sha512-pUsjUv+9XgkTn+UbLyNIT4YNZPF2p0E45FBKmDL7Ti8iovYwp2CUkQs6Q7J9y5scLxWaOM+T5jJc0ls+WHUcmQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
<script type="text/babel">
const MyComponent = function() {
// Change code below this line
return (
<div className="my-component">
The text string in my class.
</div>
);
// Change code above this line
}
// ReactDOM.render(MyComponent, document.getElementById('root'))
ReactDOM.render(<MyComponent />, document.getElementById('root'))
</script>Javascript
/*
const MyComponent = function() {
// Change code below this line
return (
<div className="my-component">
The text string in my class.
</div>
);
// Change code above this line
}
*/External Link for What is a Stateless Functional Component in React
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"Olivia, my eldest daughter, caught measles when she was seven years old. As the illness took its usual course I can remember reading to her often in bed and not feeling particularly alarmed about it. Then one morning, when she was well on the road to recovery, I was sitting on her bed showing her how to fashion little animals out of coloured pipe-cleaners, and when it came to her turn to make one herself, I noticed that her fingers and her mind were not working together and she couldn’t do anything. 'Are you feeling all right?' I asked her. 'I feel all sleepy,' she said. In an hour, she was unconscious. In twelve hours she was dead. The measles had turned into a terrible thing called measles encephalitis and there was nothing the doctors could do to save her. That was...in 1962, but even now, if a child with measles happens to develop the same deadly reaction from measles as Olivia did, there would still be nothing the doctors could do to help her. On the other hand, there is today something that parents can do to make sure that this sort of tragedy does not happen to a child of theirs. They can insist that their child is immunised against measles. ...I dedicated two of my books to Olivia, the first was ‘James and the Giant Peach’. That was when she was still alive. The second was ‘The BFG’, dedicated to her memory after she had died from measles. You will see her name at the beginning of each of these books. And I know how happy she would be if only she could know that her death had helped to save a good deal of illness and death among other children."
I just checked google books for BFG, and the dedication is there.
https://www.google.com.au/books/edition/_/quybcXrFhCIC?hl=en&gbpv=1
Roald Dahl, 1986