André Fernandes
29 lines
813 B
TypeScript
29 lines
813 B
TypeScript
export function extractDataUriMime(uri: string): string {
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return uri.substring(uri.indexOf(':') + 1, uri.indexOf(';'))
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}
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// Fairly accurate estimate that is more performant
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// than decoding and checking length of URI
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export function getDataUriSize(uri: string): number {
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return Math.round((uri.length * 3) / 4)
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}
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export function isUriImage(uri: string): boolean {
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return /\.(jpg|jpeg|png|webp).*$/.test(uri)
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}
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export function blobToDataUri(blob: Blob): Promise<string> {
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return new Promise((resolve, reject) => {
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const reader = new FileReader()
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reader.onloadend = () => {
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if (typeof reader.result === 'string') {
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resolve(reader.result)
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} else {
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reject(new Error('Failed to read blob'))
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}
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}
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reader.onerror = reject
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reader.readAsDataURL(blob)
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})
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}
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