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|
<script lang="ts">
import {
Presentation,
Slide,
FitText,
Step,
Notes,
Media,
Code
} from '@components'
import { signal } from '@motion'
const circle = signal(
{ x: 0, y: 200, r: 80, fill: '#00ffff' },
{ duration: 2000 }
)
async function animate() {
await circle.to({ x: 400, fill: '#ffff00' }, { delay: 600 })
await circle.to({ x: 0, fill: '#00ffff' }, { delay: 300 })
}
function resetAnimation() {
circle.reset()
}
</script>
<Presentation>
<Slide animate>
<p class="font-bold text-8xl text-pink-700">React Builtin Hooks</p>
</Slide>
<!-- <Slide on:in={animate} on:out={resetAnimation} animate>
<p class="font-bold text-6xl">React Builtin Hooks</p>
<div>
<ul>
<li>useState()</li>
</ul>
</div>
</Slide> -->
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-pink-700">React Builtin Hooks</p>
<ul class="mx-auto w-[200px] list-disc">
<Step>
<li>useState()</li>
</Step>
<Step>
<li>useEffect()</li>
</Step>
<Step>
<li>useContext()</li>
</Step>
<Step>
<li>useReducer()</li>
</Step>
<Step>
<li>useRef()</li>
</Step>
<Step>
<li>useMemo()</li>
</Step>
<Step>
<li>useCallback()</li>
</Step>
</ul>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-pink-700">What is a State?</p>
<Notes>
<ul>
<li>
State is something which holds the info or details about a Component's State at a TIME
</li>
<li>
It can change over time.
</li>
<li>
Whenever the state changes the COMPONENT attached to it re-renders
</li>
</ul>
</Notes>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-pink-700">useState()</p>
<Notes>
<ul>
<li>
useState hooks allows to have state variable inside a FUNCTIONAL COMPONENT
</li>
<li>
useState ENCAPSULATES only a single value
</li>
<li>
For mulatiple values you may need to call multiple useState's
</li>
<li>
useState arguments
<ul>
<li>
Initialization of a state variable
</li>
<li>
Passing function as initial value - to calculate an initial value
</li>
</ul>
</li>
<li>
Managing multiple states
<ul>
<li>
Multi-variable's
</li>
<li>
Object as value
</li>
</ul>
</li>
</ul>
</Notes>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">Side Effects</p>
<Media
class="h-[600px] w-full"
src="https://giphy.com/embed/39sYm1hvWRPN3NxHdI"
type="iframe"
>
</Media>
<Notes>
<ul>
<li>
Something which is outside the scope of REACT
<ul>
<li>
Calling AJAX requests
</li>
<li>
Calling Web API stuffs (document.get...)
</li>
<li>
localStorage etc...
</li>
<li>
setTimeout, setInterval
</li>
</ul>
</li>
<li>
Everything which is not part of React Library
</li>
<li>
Fun Fact - What happens if you call setTimeout without any arguments
<ul>
<li>
Executes outside the execution queue
</li>
</ul>
</li>
</ul>
</Notes>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto w-[800px]">
<Code lang="js" lines="1-3|3">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect"
})
`}
</Code>
</div>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto w-[800px]">
<Code lang="js" lines="3-4">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect"
}) ← No Arguments means this will be called each time
this component re-renders
`}
</Code>
</div>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto w-[800px]">
<Code lang="js" lines="3-4">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect"
}, []) ← An empty array as an argument will run the
effect once the component is mounted
`}
</Code>
</div>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto w-[800px]">
<Code lang="js" lines="3-4">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect"
}, [prop1]) ← We can pass value
`}
</Code>
</div>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto">
<Code lang="js" lines="3-4">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect"
}, [prop1, state1]) ← Actually we can pass multiple-values
`}
</Code>
</div>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto w-[800px]">
<Code lang="js" lines="3-4">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect"
}, [prop1, state1]) ← This is called dependency list
`}
</Code>
</div>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto w-[800px]">
<Code lang="js" lines="3-4">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect"
}, [prop1, state1]) ← Effect will run whenever any
of the values on dependency list changes
`}
</Code>
</div>
</Slide>
<Slide on:in={animate} animate>
<p class="font-bold text-6xl mb-4 text-yellow-500">useEffect</p>
<div class="mx-auto w-[800px]">
<Code lang="js" lines="4-6">
{`
useEffect(() => {
document.title = "Hey There, I'm from useEffect";
return () => {
// Clean Up function 🧹
}
}, [prop1, state1]);
`}
</Code>
</div>
<Notes>
<ul>
<li>
You can do removeListeners, unsubscribes, reset layouts etc
</li>
<li>
This will be called by default when component unmouts.
</li>
</ul>
</Notes>
</Slide>
</Presentation>
|
