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Clean up useEffect animations (Gatsby) #934

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Clean up useEffect animations (Gatsby) #934

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25 changes: 16 additions & 9 deletions src/pages/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,7 @@ const IndexPage = () => {
useEffect( () => {
let i = 0
let forward = true
let timer

const showResponse = num => {
document.getElementById( 'r1' ).style.display = num === 1 ? 'block' : 'none'
Expand All @@ -104,33 +105,35 @@ const IndexPage = () => {
if ( i === 20 ) {
forward = false
showResponse( 3 )
setTimeout( type, 1500 )
timer = setTimeout( type, 1500 )
} else if ( i === 11 ) {
showResponse( 2 )
setTimeout( type, 1500 )
timer = setTimeout( type, 1500 )
} else {
setTimeout( type, Math.random() * 180 + 70 )
timer = setTimeout( type, Math.random() * 180 + 70 )
}
} else {
i -= 1
document.getElementById( `ch${i}` ).style.display = 'none'
if ( i === 0 ) {
forward = true
showResponse( 1 )
setTimeout( type, 2000 )
timer = setTimeout( type, 2000 )
} else {
setTimeout( type, 80 )
timer = setTimeout( type, 80 )
}
}
}
setTimeout( type, 2000 )
timer = setTimeout( type, 2000 )
return () => clearTimeout( timer )
}, [] )

// Illustration of a type IDL following a query by line
useEffect( () => {
const typeHighlight = document.getElementById( 'type-highlight' )
const queryHighlight = document.getElementById( 'query-highlight' )
let line = 0
let timer

const typeLines = [ 2, 6, 7, 6, 8, 13, 14, 9, 18, 19, 20, 13 ]
const queryLines = [ 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14 ]
Expand All @@ -139,10 +142,11 @@ const IndexPage = () => {
typeHighlight.style.top = `${17 * typeLines[ line ] - 9}px`
queryHighlight.style.top = `${17 * queryLines[ line ] - 9}px`
line = ( line + 1 ) % typeLines.length
setTimeout( highlightLine, 800 + Math.random() * 200 )
timer = setTimeout( highlightLine, 800 + Math.random() * 200 )
}

highlightLine()
return () => clearTimeout( timer )
}, [] )

// Illustration showing more legs added to a graph? Or a type evolving over time?
Expand All @@ -151,23 +155,26 @@ const IndexPage = () => {
const inView = document.getElementById( 'typeEvolveView' )
inView.className = `step${i}`

setInterval( () => {
const interval = setInterval( () => {
i = ( i + 1 ) % 7
inView.className = `step${i}`
}, 2200 )
return () => clearInterval( interval )
}, [] )

// Illustration of each field becoming a function?
useEffect( () => {
let i = 0
let timer
const inView = document.getElementById( 'leverageCodeView' )
const delayBefore = [ 800, 1800, 1200, 3000, 3000, 3000 ]
const step = () => {
inView.className = `step${i}`
i = ( i + 1 ) % 6
setTimeout( step, delayBefore[ i ] )
timer = setTimeout( step, delayBefore[ i ] )
}
step()
return () => clearTimeout( timer )
}, [] )

return (
Expand Down