imgbb-webp-uploader
Version:
A utility for converting images to WebP format and uploading them to ImgBB
106 lines (105 loc) • 5.74 kB
JavaScript
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};
/**
* Converts an image file to WebP format
* @param file Original image file
* @param quality Quality of the WebP image (0-1)
* @param maxWidth Maximum width of the output image
* @returns Promise that resolves to a File object in WebP format
*/
export var convertToWebP = function (file, quality, maxWidth) {
if (quality === void 0) { quality = 0.8; }
if (maxWidth === void 0) { maxWidth = 1920; }
return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (resolve, reject) {
// Create image element to load the file
var img = new Image();
img.onload = function () {
// Calculate new dimensions while maintaining aspect ratio
var width = img.width;
var height = img.height;
if (width > maxWidth) {
var ratio = maxWidth / width;
width = maxWidth;
height = Math.round(height * ratio);
}
// Create canvas for drawing the image
var canvas = document.createElement('canvas');
canvas.width = width;
canvas.height = height;
// Draw image on canvas
var ctx = canvas.getContext('2d');
if (!ctx) {
reject(new Error('Could not get canvas context'));
return;
}
ctx.drawImage(img, 0, 0, width, height);
// Convert to WebP
canvas.toBlob(function (blob) {
if (!blob) {
reject(new Error('Could not convert image to WebP'));
return;
}
// Create new file with WebP extension
var fileName = file.name.split('.')[0] + '.webp';
var webpFile = new File([blob], fileName, { type: 'image/webp' });
resolve(webpFile);
}, 'image/webp', quality);
};
img.onerror = function () {
reject(new Error('Failed to load image'));
};
// Load image from file
img.src = URL.createObjectURL(file);
})];
});
});
};
/**
* Gets the size of a file in a human-readable format
* @param bytes Size in bytes
* @returns Formatted size string (e.g., "1.5 MB")
*/
export var getFormattedFileSize = function (bytes) {
if (bytes === 0)
return '0 Bytes';
var k = 1024;
var sizes = ['Bytes', 'KB', 'MB', 'GB'];
var i = Math.floor(Math.log(bytes) / Math.log(k));
return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
};