@nuxt/image/dist/runtime/utils/meta.js

Nuxt Image Module

export async function imageMeta(_ctx, url) {
  const meta = await _imageMeta(url).catch((err) => {
    console.error("Failed to get image meta for " + url, err + "");
    return {
      width: 0,
      height: 0,
      ratio: 0
    };
  });
  return meta;
}
async function _imageMeta(url) {
  if (import.meta.server) {
    const imageMeta2 = await import("image-meta").then((r) => r.imageMeta);
    const data = await fetch(url).then((res) => res.buffer());
    const metadata = imageMeta2(data);
    if (!metadata) {
      throw new Error(`No metadata could be extracted from the image \`${url}\`.`);
    }
    const { width, height } = metadata;
    const meta = {
      width,
      height,
      ratio: width && height ? width / height : void 0
    };
    return meta;
  }
  if (typeof Image === "undefined") {
    throw new TypeError("Image not supported");
  }
  return new Promise((resolve, reject) => {
    const img = new Image();
    img.onload = () => {
      const meta = {
        width: img.width,
        height: img.height,
        ratio: img.width / img.height
      };
      resolve(meta);
    };
    img.onerror = (err) => reject(err);
    img.src = url;
  });
}