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ๆ˜จๆ—ฅใ€็งใฏ
ใชใงใ—ใ“ใ•ใ‚“ใงๅ›žใŒๅ›žใ‚‹ๅ›ž๏ฝœใฟใ‘CAT
ใงใ€ใ“ใ†ๆ›ธใ„ใŸใ€‚

ๆฌกใฏใ€CSS ใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใ‚’็”จใ„ใฆใ€ใƒ—ใƒญใ‚ฐใƒฉใƒ ใ‚’ๆ›ธใ‹ใšใซๅ›žใ‚’ๅ›žใ™ใฎใซๆŒ‘ๆˆฆใ—ใŸใ„ใ€‚

ใใ†ใ„ใˆใฐใ€ไปŠใฏ Qiita ใงๅคง้‡ใฎ่จ˜ไบ‹ใ‚’ๆ›ธใใ“ใจใ‚’่ฆๆฑ‚ใ•ใ‚Œใฆใ„ใ‚‹ใ‚“ใ ใฃใŸใ€‚
ๆ—ฉ้€Ÿใ‚„ใฃใฆใฟใ‚ˆใ†ใ€‚

CSS ใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใฎๆŒ‡ๅฎš

CSS ใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใฏใ€CSS ใฎๆŒ‡ๅฎšใซใ‚ˆใ‚Šใ€ใใฎ่ฆ็ด ใซ่จญๅฎšใ•ใ‚Œใฆใ„ใ‚‹ CSS ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใ‚’ๆ™‚้–“ใฎ็ตŒ้Žใซไผดใ„่‡ชๅ‹•ใงๅค‰ๅŒ–ใ•ใ›ใ‚‹ๆฉŸ่ƒฝใงใ‚ใ‚‹ใ€‚
ใ“ใ‚Œใซใ‚ˆใ‚Šใ€ๅŸบๆœฌ็š„ใชใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใงใ‚ใ‚Œใฐใ€JavaScript ใงๆ˜Ž็คบ็š„ใซๆ“ไฝœใ—ใชใใฆใ‚‚ๅฎŸ็พใงใใ‚‹ใ€‚

ๅ…ทไฝ“็š„ใซใฏใ€ไปฅไธ‹ใฎใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใงๆŒ‡ๅฎšใ‚’่กŒใ†ใ€‚

ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃ ๆ„ๅ‘ณ ๅˆๆœŸๅ€ค
animation-duration ๅค‰ๅŒ–ใซใ‹ใ‘ใ‚‹ๆ™‚้–“ 0s
animation-timing-function ๅค‰ๅŒ–ใฎ่ฃœ้–“ๆ–นๆณ• ease (ๆœ€ๅˆใจๆœ€ๅพŒใŒใ‚†ใฃใใ‚Š)
animation-delay ๅค‰ๅŒ–ใ‚’ๅง‹ใ‚ใ‚‹ๆ™‚ๅˆป 0s
animation-iteration-count ๅค‰ๅŒ–ใ‚’่กŒใ†ๅ›žๆ•ฐ 1
animation-direction ๅค‰ๅŒ–ใฎๆ–นๅ‘ normal (0% โ†’ 100%)
animation-fill-mode ๅค‰ๅŒ–ๅค–ใงใฎ้ฉ็”จ none (ๅค‰ๅŒ–ไธญไปฅๅค–้ฉ็”จใ—ใชใ„)
animation-play-state ๅค‰ๅŒ–ใฎไธ€ๆ™‚ๅœๆญข running (ไธ€ๆ™‚ๅœๆญขใ—ใชใ„)
animation-name ใ‚ญใƒผใƒ•ใƒฌใƒผใƒ ใƒชใ‚นใƒˆๅ none

ใ“ใ‚Œใ‚‰ใฎใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใฏใ€ใ“ใฎ้ †็•ชใง animation ใซใ‚ˆใ‚Šไธ€ๆ‹ฌๆŒ‡ๅฎšใงใใ‚‹ใ€‚
ใ“ใฎใจใใ€ๆŒ‡ๅฎšใ—ใชใ„ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใฎๅ€คใฏ็œ็•ฅใงใใ‚‹ใŒใ€

  • ๆ™‚้–“ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใจใ€ๆœ€ๅˆใฎใ‚‚ใฎใŒ animation-duration ใจใ—ใฆ่งฃ้‡ˆใ•ใ‚Œใ‚‹
  • animation-name ใฎใคใ‚‚ใ‚Šใงๅๅ‰ใ‚’ๆŒ‡ๅฎšใ—ใฆใ‚‚ใ€ใใ‚ŒใŒ็œ็•ฅใ—ใŸไป–ใฎใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใฎๅ€คใจใ—ใฆๆœ‰ๅŠนใชๆ–‡ๅญ—ๅˆ—ใฎๅ ดๅˆใ€ใใฎใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใฎ่จญๅฎšใจใ—ใฆๆ‰ฑใ‚ใ‚Œใ‚‹ใ“ใจใŒใ‚ใ‚‹

ใจใ„ใฃใŸๆณจๆ„็‚นใŒใ‚ใ‚‹ใ€‚

animation-duration (ๅค‰ๅŒ–ใซใ‹ใ‘ใ‚‹ๆ™‚้–“)

1ๅ‘จๆœŸใฎๅค‰ๅŒ–ใซใ‹ใ‘ใ‚‹ๆ™‚้–“ใ‚’ใ€s (็ง’) ใพใŸใฏ ms (ใƒŸใƒช็ง’) ๅ˜ไฝใงๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
ๅ˜ไฝใฏ็œ็•ฅใงใใชใ„ใ€‚

ๆŒ‡ๅฎšไพ‹
.target {
  animation-duration: 1s; /* 1ๅ‘จๆœŸใฎๅค‰ๅŒ–ใ‚’1็ง’ใง่กŒใ† */
}

animation-timing-function (ๅค‰ๅŒ–ใฎ่ฃœ้–“ๆ–นๆณ•)

ๆ™‚ๅˆปใจใ€ใใฎๆ™‚ๅˆปใงๅค‰ๅŒ–ใŒใฉใ“ใพใง้€ฒใ‚“ใ ใ‹ใฎ้–ขไฟ‚ใ‚’ๆฑบใ‚ใ‚‹้–ขๆ•ฐใ‚’่จญๅฎšใ™ใ‚‹ใ€‚
ไธ€ไพ‹ใจใ—ใฆใ€ไปฅไธ‹ใฎๅๅ‰ใŒๆŒ‡ๅฎšใงใใ‚‹ใ€‚

ๅๅ‰ ๅ‹•ไฝœ ๅ‚™่€ƒ
ease ๅบ็›คใจ็ต‚็›คใฏ้…ใใ€ไธญ็›คใฏ้€Ÿใๅค‰ๅŒ–ใ™ใ‚‹ ใƒ‡ใƒ•ใ‚ฉใƒซใƒˆๅ€ค
linear ๅธธใซไธ€ๅฎšใฎ้€Ÿใ•ใงๅค‰ๅŒ–ใ™ใ‚‹ -

ใใฎไป–ใฎๆŒ‡ๅฎšๆ–นๆณ•ใฏใ€ไปฅไธ‹ใ‚’ๅ‚็…งใ—ใฆใปใ—ใ„ใ€‚
animation-timing-function - CSS | MDN

ๆŒ‡ๅฎšไพ‹
.target {
  animation-timing-function: linear; /* ็ญ‰้€Ÿใงๅค‰ๅŒ–ใ™ใ‚‹ */
}

animation-delay (ๅค‰ๅŒ–ใ‚’ๅง‹ใ‚ใ‚‹ๆ™‚ๅˆป)

ใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใฎใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใŒ่จญๅฎšใ•ใ‚Œใฆใ‹ใ‚‰ๅฎŸ้š›ใซๅค‰ๅŒ–ใŒๅง‹ใพใ‚‹ใพใงใฎๆ™‚้–“ใ‚’ใ€s (็ง’) ใพใŸใฏ ms (ใƒŸใƒช็ง’) ๅ˜ไฝใงๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
ๅ˜ไฝใฏ็œ็•ฅใงใใชใ„ใ€‚

่ฒ ใฎๆ™‚้–“ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใจใ€ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใ‚’่จญๅฎšใ—ใฆใ™ใใซใ€ๆŒ‡ๅฎšใ—ใŸๆ™‚้–“้ŽใŽใŸๆ™‚็‚นใ‹ใ‚‰ๅค‰ๅŒ–ใŒๅง‹ใพใ‚‹ใ€‚

ๆŒ‡ๅฎšไพ‹
.target {
  animation-delay: 1s; /* 1็ง’ๅพŒใ‹ใ‚‰ๅค‰ๅŒ–ใ‚’้–‹ๅง‹ใ™ใ‚‹ */
}

animation-iteration-count (ๅค‰ๅŒ–ใ‚’่กŒใ†ๅ›žๆ•ฐ)

ๅค‰ๅŒ–ใ‚’ไฝ•ๅ›ž็นฐใ‚Š่ฟ”ใ—ใฆ่กŒใ†ใ‹ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
ๆ•ดๆ•ฐใงใชใ„ๅฎŸๆ•ฐใ‚‚ๆŒ‡ๅฎšใงใใ€ๆŒ‡ๅฎšใ—ใŸๅ ดๅˆใฏๆœ€ๅพŒใฎๅค‰ๅŒ–ใŒๆŒ‡ๅฎšใซๅฟœใ˜ใฆ้€”ไธญใงๆญขใพใ‚‹ใ€‚
ๆ•ฐๅ€คใฎใ‹ใ‚ใ‚Šใซ infinite ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใจใ€ๅค‰ๅŒ–ใ‚’็„กๅˆถ้™ใซ็นฐใ‚Š่ฟ”ใ™ใ€‚

ๆŒ‡ๅฎšไพ‹
.target {
  animation-iteration-count: infinite; /* ๅค‰ๅŒ–ใ‚’็„กๅˆถ้™ใซ็นฐใ‚Š่ฟ”ใ™ */
}

animation-direction (ๅค‰ๅŒ–ใฎๆ–นๅ‘)

ๅค‰ๅŒ–ใ‚’ใใฎใพใพ่กŒใ†ใ‹ใ€้€†ๅ‘ใใซ (ๆœฌๆฅใฎใŠใ‚ใ‚Šใ‹ใ‚‰ใฏใ˜ใ‚ใซ) ่กŒใ†ใ‹ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
ใพใŸใ€ๅค‰ๅŒ–ใ‚’ๅพ€ๅพฉใ•ใ›ใ‚‹ (1ๅ‘จๆœŸใ”ใจใซๆ–นๅ‘ใ‚’ๅค‰ใˆใ‚‹) ใ“ใจใ‚‚ใงใใ‚‹ใ€‚

ไปฅไธ‹ใฎๅๅ‰ใ‹ใ‚‰ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚

ๅๅ‰ ๆ„ๅ‘ณ
normal ๅค‰ๅŒ–ใ‚’ใใฎใพใพ่กŒใ†
reverse ๅค‰ๅŒ–ใ‚’้€†ๅ‘ใใซ่กŒใ†
alternate ๅค‰ๅŒ–ใ‚’ๅพ€ๅพฉใ•ใ›ใ‚‹
alternate-reverse ๅค‰ๅŒ–ใ‚’้€†ๅ‘ใใ‹ใ‚‰ๅง‹ใ‚ใฆๅพ€ๅพฉใ•ใ›ใ‚‹
ๆŒ‡ๅฎšไพ‹
.target {
  animation-direction: alternate; /* ๅค‰ๅŒ–ใ‚’ๅพ€ๅพฉใ•ใ›ใ‚‹ */
}

animation-fill-mode (ๅค‰ๅŒ–ๅค–ใงใฎ้ฉ็”จ)

ๅค‰ๅŒ–ใฎๆŒ‡ๅฎšใซใ‚ˆใ‚Š่จญๅฎšใ•ใ‚Œใ‚‹ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใ‚’ใ€ๅค‰ๅŒ–ใฎๅ‰ใ‚„ๅพŒใซใ‚‚้ฉ็”จใ™ใ‚‹ใ‹ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
้ฉ็”จใ—ใชใ„ๅ ดๅˆใ€ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใฏใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณไปฅๅค–ใฎ CSS ใงๆŒ‡ๅฎšใ•ใ‚ŒใŸใ‚‚ใฎใซใชใ‚‹ใ€‚

ไปฅไธ‹ใฎๅๅ‰ใ‹ใ‚‰ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚

ๅๅ‰ ๆ„ๅ‘ณ
none ๅค‰ๅŒ–ไธญไปฅๅค–ใฏ้ฉ็”จใ—ใชใ„
forwards ๅค‰ๅŒ–ๅพŒใซ้ฉ็”จใ™ใ‚‹ (ๅค‰ๅŒ–ๅ‰ใฏ้ฉ็”จใ—ใชใ„)
backwards ๅค‰ๅŒ–ๅ‰ใซ้ฉ็”จใ™ใ‚‹ (ๅค‰ๅŒ–ๅพŒใฏ้ฉ็”จใ—ใชใ„)
both ๅค‰ๅŒ–ๅ‰ใ‚‚ๅค‰ๅŒ–ๅพŒใ‚‚้ฉ็”จใ™ใ‚‹
ๆŒ‡ๅฎšไพ‹
.target {
  animation-fill-mode: forwards; /* ๅค‰ๅŒ–ๅพŒใ€ๅค‰ๅŒ–ใ—ใŸใ‚นใ‚ฟใ‚คใƒซใ‚’ไฝฟ็”จใ™ใ‚‹ */
}

animation-play-state (ๅค‰ๅŒ–ใฎไธ€ๆ™‚ๅœๆญข)

ๅค‰ๅŒ–ใ‚’ไธ€ๆ™‚ๅœๆญขใ™ใ‚‹ใ‹ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
ไธ€ๆ™‚ๅœๆญขใ‚’่งฃ้™คใ™ใ‚‹ใจใ€ไธ€ๆ™‚ๅœๆญขใ—ใŸๆ™‚ๅˆปใ‹ใ‚‰ๅค‰ๅŒ–ใŒๅ†้–‹ใ™ใ‚‹ใ€‚

ไปฅไธ‹ใฎๅๅ‰ใ‹ใ‚‰ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚

ๅๅ‰ ๆ„ๅ‘ณ
running ไธ€ๆ™‚ๅœๆญขใ—ใชใ„ (ๅค‰ๅŒ–ใ‚’้€ฒใ‚ใ‚‹)
paused ไธ€ๆ™‚ๅœๆญขใ™ใ‚‹
ๆŒ‡ๅฎšไพ‹
.target {
  animation-play-state: paused; /* ๅค‰ๅŒ–ใ‚’ไธ€ๆ™‚ๅœๆญขใ™ใ‚‹ */
}

animation-name (ใ‚ญใƒผใƒ•ใƒฌใƒผใƒ ใƒชใ‚นใƒˆๅ)

ใฉใฎใ‚ˆใ†ใชๅค‰ๅŒ–ใ‚’่กŒใ†ใ‹ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ‚ญใƒผใƒ•ใƒฌใƒผใƒ ใƒชใ‚นใƒˆใฎๅๅ‰ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
ใ‚ญใƒผใƒ•ใƒฌใƒผใƒ ใƒชใ‚นใƒˆใฏใ€0% (ใฏใ˜ใ‚) ใ‹ใ‚‰ 100% (ใŠใ‚ใ‚Š) ใพใงใฎๅœฐ็‚นใจใ€ใใฎๅœฐ็‚นใซใŠใ‘ใ‚‹ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใฎๅ€คใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ€‚
0% ใฏ fromใ€100% ใฏ to ใจใ‚‚ๆ›ธใ‘ใ‚‹ใ€‚

ๆŒ‡ๅฎšไพ‹
.target {
  animation-name: anime1; /* ใ‚ญใƒผใƒ•ใƒฌใƒผใƒ ใƒชใ‚นใƒˆใฎๅๅ‰ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ */
}

/* ใ‚ญใƒผใƒ•ใƒฌใƒผใƒ ใƒชใ‚นใƒˆ */
@keyframes anime1 {
  /* ๅค‰ๅŒ–้–‹ๅง‹ๆ™‚ใฎใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใ‚’่จญๅฎšใ™ใ‚‹ */
  0% {
    color: #000000;
  }

  /* ๅค‰ๅŒ–็ต‚ไบ†ๆ™‚ใฎใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใ‚’่จญๅฎšใ™ใ‚‹ */
  100% {
    color: #ffffff;
  }
}

ๅ›žใ‚’ๅ›žใ™

CSS ใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใ‚’็”จใ„ใฆใ€ๅฎŸ้š›ใซๅ›žใ‚’ๅ›žใ—ใฆใฟใŸใ€‚
ไปŠๅ›žใฏใ€animation-timing-function ใฎๆŒ‡ๅฎšใ‚’ใ—ใชใ„ (ease) ใ‚‚ใฎใจ linear ใ‚’ๆŒ‡ๅฎšใ™ใ‚‹ใ‚‚ใฎใ‚’ไธฆในใ€ๆฏ”่ผƒใ—ใฆใฟใŸใ€‚

HTML
<div class="kaiWrapper">
<div class="kai" id="kai1">ๅ›ž</div>
</div>
<div class="kaiWrapper">
<div class="kai" id="kai2">ๅ›ž</div>
</div>
CSS
.kaiWrapper {
  width: 20em;
  height: 20em;
  display: inline-flex;
  justify-content: center;
  align-items: center;
}

.kai {
  font-size: 1500%;
}

#kai1 {
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-name: rotate-anime;
}

#kai2 {
  animation: 1s linear infinite rotate-anime;
}

@keyframes rotate-anime {
  0% {
    rotate: 0turn;
  }
  100% {
    rotate: 1turn;
  }
}

ๅทฆๅด (#kai1) ใฏใ€ๅ„ใƒ—ใƒญใƒ‘ใƒ†ใ‚ฃใฎๅ€‹ๅˆฅ่จญๅฎšใ‚’็”จใ„ใ€animation-timing-function ใฏๆŒ‡ๅฎšใ›ใšใƒ‡ใƒ•ใ‚ฉใƒซใƒˆใฎ ease ใ‚’็”จใ„ใฆใ„ใ‚‹ใ€‚
ๅณๅด (#kai2) ใฏใ€animation ใซใ‚ˆใ‚‹ไธ€ๆ‹ฌ่จญๅฎšใ‚’็”จใ„ใ€animation-timing-function ใฏ linear ใ‚’ๆŒ‡ๅฎšใ—ใฆใ„ใ‚‹ใ€‚

ๅณๅด (linear ๆŒ‡ๅฎš) ใฏไธ€ๅฎšใฎ้€Ÿใ•ใงๅ›žใฃใฆใ„ใ‚‹ใฎใซๅฏพใ—ใ€ๅทฆๅด (ease ้ฉ็”จ) ใฏไธญ็›คใฎ้€Ÿใ•ใŒๅบ็›คใ‚„็ต‚็›คใ‚ˆใ‚Š้€Ÿใใชใฃใฆใ„ใ‚‹ใฎใŒใ‚ใ‹ใ‚‹ใ€‚

ใพใจใ‚

CSS ใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใฎๆŒ‡ๅฎšๆ–นๆณ•ใ‚’็ขบ่ชใ—ใ€ๅฎŸ้š›ใซ CSS ใ‚ขใƒ‹ใƒกใƒผใ‚ทใƒงใƒณใ‚’็”จใ„ใฆใƒ—ใƒญใ‚ฐใƒฉใƒ ใ‚’ๆ›ธใ‹ใšใซๅ›žใ‚’ๅ›žใ™ใ“ใจใŒใงใใŸใ€‚

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