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export let hasWebPSupport = null; | |
export const loadImgSrc(src: string): Promise<void> { | |
return new Promise((resolve, reject) => { | |
const img = new Image(); | |
img.onload = () => resolve(); | |
img.onerror = () => reject(); | |
img.src = src; | |
}); | |
} | |
export const checkWebPSupport = () => { | |
if (typeof hasWebPSupport === 'boolean') return; | |
// lifted from modernizer src | |
return loadImageSrc('data:image/webp;base64,UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAABBxAR/Q9ERP8DAABWUDggGAAAADABAJ0BKgEAAQADADQlpAADcAD++/1QAA==') | |
.then(() => { | |
hasWebPSupport = true; | |
}) | |
.catch(() => { | |
hasWebPSupport = false; | |
}); | |
}; |
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