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feat: added method for check webp is available

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원더 2021-01-11 22:06:29 +09:00
parent ac4d00bf8b
commit a6e6c575c8
1 changed files with 10 additions and 0 deletions
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10
utils/Tools.ts
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@ -21,3 +21,13 @@ export function checkPerm(base: number, required: number | UserPemissionFlags):b
export function makeImageURL(root:string, { format='png', size=256 }:ImageOptions):string {
return `${root}.${format}?size=${size}`
}
export function supportsWebP() {
const elem = document.createElement('canvas')
if (elem.getContext && elem.getContext('2d')) {
// was able or not to get WebP representation
return elem.toDataURL('image/webp').indexOf('data:image/webp') == 0
}
// very old browser like IE 8, canvas not supported
return false
}