JS上传图片限制尺寸

JS上传 图片限制尺寸

上传 图片限制尺寸

const isValidImg = (file: any) => {
  return new Promise((resolve, reject) => {
    const _URL = window.URL || window.webkitURL;
    const image = new Image();
    image.src = _URL.createObjectURL(file);
    image.onload = () => {
      const { width, height } = image;
      if (width / height === 4 / 3) return resolve(true);
      resolve(false);
    };
  });
};