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Pure CSS Spinner
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| <!doctype html> <title> Pure CSS spinner </title> | |
| <style> | |
| /* | |
| https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/hsl() | |
| https://developer.mozilla.org/en-US/docs/Web/CSS/color_value#fully_saturated_colors | |
| https://colordesigner.io/convert/hextohsl | |
| https://una.im/css-color-theming/ | |
| */ | |
| :root { | |
| --spinner-duration: 1.5s; | |
| --X-spinner-color: #44f; /* hsl(240, 100%, 63%) */ /* teal hsl(180, 100, 25) */ | |
| --spinner-hue: 240deg; | |
| --spinner-lightness: 63%; | |
| --spinner-darken: 30%; | |
| --spinner-size: 40vh; /* Was: 12rem; */ | |
| } | |
| body { | |
| margin: 1rem auto; | |
| max-width: 33rem; | |
| } | |
| @keyframes SpinnerY { | |
| 0% { transform: rotateY(0deg); } | |
| 100% { transform: rotateY(180deg); } | |
| } | |
| @keyframes SpinnerX { | |
| 0% { transform: rotateX(0deg); } | |
| 100% { transform: rotateX(180deg); } | |
| } | |
| /* Was: 'SpinnerZ' */ | |
| @keyframes Rotate { | |
| 0% { transform: rotateZ(0deg); } | |
| /* 12.5%{ transform: rotateZ(45deg); } | |
| ... | |
| 87.5%{ transform: rotateZ(315deg); } */ | |
| 100% { transform: rotateZ(360deg); } | |
| } | |
| @keyframes AntiClockwise { | |
| 0% { transform: rotate(360deg); } | |
| /* 50% { transform: rotate(180deg); } */ | |
| 100% { transform: rotate(0deg); } | |
| } | |
| .css-spinner { | |
| X-border: 2.5vh solid var(--spinner-color); | |
| border-color: hsl(var(--spinner-hue), 100%, var(--spinner-lightness)); | |
| border-style: solid; | |
| border-width: 2.5vh; | |
| border-radius: 50%; | |
| margin: 2rem auto; | |
| height: var(--spinner-size); | |
| width: var(--spinner-size); | |
| animation-direction: normal; | |
| animation-duration: var(--spinner-duration); | |
| animation-iteration-count: infinite; | |
| animation-timing-function: linear; /* << +1 ! */ | |
| animation-play-state: running; | |
| } | |
| .css-spinner.pause { | |
| animation-play-state: paused; | |
| } | |
| .css-spinner.y { | |
| animation-name: SpinnerY; | |
| } | |
| .css-spinner.x { | |
| animation-name: SpinnerX; | |
| /* transform: rotateZ(90deg); */ | |
| } | |
| /* .css-spinner.y45 { | |
| animation-name: SpinnerY; | |
| transform: rotateZ(45deg); | |
| } */ | |
| .css-spinner.z, | |
| .css-spinner.rotate { | |
| animation-name: Rotate; | |
| background-color: #eef; | |
| border-bottom-color: hsl(var(--spinner-hue), 100%, calc(var(--spinner-lightness) - var(--spinner-darken))); | |
| X-border-bottom-color: #006; | |
| border-style: outset; | |
| } | |
| .css-spinner.z.anti, | |
| .css-spinner.rotate.anti { | |
| animation-name: AntiClockwise; | |
| border-left-color: hsl(var(--spinner-hue), 100%, calc(var(--spinner-lightness) - var(--spinner-darken))); | |
| } | |
| </style> | |
| <h1> Pure CSS spinner </h1> | |
| <div class="css-spinner z XX_anti" aria-label="Loading" title="Loading"></div> | |
| <div class="css-spinner y" aria-label="Loading" title="Loading"></div> | |
| <pre>© 2021-10-26 Nick Freear. </pre> |
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