caniemail/dist/image-titles.js

HTML and CSS Feature Support for Email Clients from caniemail.com

import { getFeatures } from './features.js';
const features = getFeatures().image;
const formatTitles = {
    apng: 'Animated PNG image format',
    avif: 'AVIF image format',
    bmp: 'BMP image format',
    gif: 'GIF image format',
    heic: 'HEIF image format',
    heif: 'HEIF image format',
    ico: 'ICO image format',
    jpeg: 'JPG image format',
    jpg: 'JPG image format',
    png: 'PNG image format',
    svg: 'SVG image format',
    tif: 'TIFF image format',
    tiff: 'TIFF image format',
    webp: 'webP image format'
};
const mimeTitles = {
    'image/apng': 'Animated PNG image format',
    'image/avif': 'AVIF image format',
    'image/bmp': 'BMP image format',
    'image/gif': 'GIF image format',
    'image/heic': 'HEIF image format',
    'image/heif': 'HEIF image format',
    'image/jpeg': 'JPG image format',
    'image/jpg': 'JPG image format',
    'image/png': 'PNG image format',
    'image/svg+xml': 'SVG image format',
    'image/tiff': 'TIFF image format',
    'image/vnd.microsoft.icon': 'ICO image format',
    'image/webp': 'webP image format'
};
const getUrlFormatTitle = (url) => {
    const dataUriMime = /^data:([^;,]+)/i.exec(url.trim())?.[1]?.toLowerCase();
    if (dataUriMime)
        return mimeTitles[dataUriMime];
    const path = url.split(/[?#]/, 1)[0];
    const extension = /\.([a-z0-9]+)$/i.exec(path)?.[1]?.toLowerCase();
    if (!extension)
        return undefined;
    return formatTitles[extension];
};
export const getMatchingImageTitles = ({ urls }) => {
    const titles = new Set();
    for (const url of urls) {
        const title = getUrlFormatTitle(url);
        if (title && features.has(title))
            titles.add(title);
    }
    return [...titles];
};
export const getUrlsFromSrcset = (srcset) => srcset
    .split(',')
    .map((candidate) => candidate.trim().split(/\s+/, 1)[0])
    .filter((url) => url !== undefined && url !== '');
export const getUrlsFromCssValue = (value) => [...value.matchAll(/url\(\s*(['"]?)(.*?)\1\s*\)/gi)]
    .map((match) => match[2]?.trim())
    .filter((url) => url !== undefined && url !== '');
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