const regex = /@(\d+)[Ww]_(\d+)[Hh]/; const dpi = settings.imageResolutionScale === "auto" ? window.devicePixelRatio : parseInt(settings.imageResolutionScale); const excludeSelectors = [ "#certify-img1", "#certify-img2", ]; const imageFormats = [ ".jpg", ".png", ".gif", ".webp" ] const walk = (rootElement: Node, action: (node: HTMLElement) => void) => { const walker = document.createTreeWalker(rootElement, NodeFilter.SHOW_ELEMENT, null, false); let node = walker.nextNode(); while (node) { action(node as HTMLElement); node = walker.nextNode(); } } export async function imageResolution(element: HTMLElement) { const replaceSource = (getValue: (e: HTMLElement) => string | null, setValue: (e: HTMLElement, v: string) => void) => { const value = getValue(element); if (value === null) { return; } if (excludeSelectors.some(it => element.matches(it))) { return; } // if (!imageFormats.some(it => value.endsWith(it))) // { // return; // } const match = value.match(regex); if (!match) { return; } let [, width, height] = match; let lastWidth = parseInt(element.getAttribute("data-resolution-width") || "0"); if (parseInt(width) >= lastWidth && lastWidth !== 0) { return; } if (element.getAttribute("width") === null && element.getAttribute("height") === null) { element.setAttribute("width", width); } width = (dpi * parseInt(width)).toString(); height = (dpi * parseInt(height)).toString(); element.setAttribute("data-resolution-width", width); setValue(element, value.replace(regex, `@${width}w_${height}h`)); }; Observer.observe(element, () => { replaceSource(e => e.getAttribute("src"), (e, v) => e.setAttribute("src", v)); replaceSource(e => e.style.backgroundImage, (e, v) => e.style.backgroundImage = v); }, { attributeFilter: ["src", "style"], attributes: true }); } walk(document.body, it => imageResolution(it)); Observer.childListSubtree(document.body, records => { for (const record of records) { for (const node of record.addedNodes) { if (node instanceof HTMLElement) { imageResolution(node); if (node.nodeName.toUpperCase() !== "IMG") { walk(node, it => imageResolution(it)); } } } } }); export default { export: { imageResolution } };