@slan-health/taro-vueuse/dist/useImage/utils.js

taro vue版本hooks

import Compressor from "../node_modules/.pnpm/compressorjs-global@1.1.2/node_modules/compressorjs-global/dist/compressor.esm.js";
const downloadImage = async (filePath) => {
  const responese = await fetch(filePath);
  const blob = await responese.blob();
  return blob;
};
const generateBlobUrl = (blob) => {
  const blobInstance = new Blob([blob], {
    type: "application/octet-stream"
  });
  const href = window.URL.createObjectURL(blobInstance);
  return href;
};
const saveImageForH5 = async (filePath) => {
  if (filePath) {
    let result = true;
    try {
      const blob = await downloadImage(filePath);
      const href = generateBlobUrl(blob);
      const downloadElement = document.createElement("a");
      downloadElement.href = href;
      downloadElement.download = filePath.split("/").reverse()[0];
      document.body.appendChild(downloadElement);
      downloadElement.click();
      document.body.removeChild(downloadElement);
      window.URL.revokeObjectURL(href);
    } catch (e) {
      result = false;
    }
    return result;
  }
  return false;
};
const compressForH5 = (blob, quality) => {
  return new Promise((resolve, reject) => {
    new Compressor(blob, {
      quality: (quality || 80) / 100,
      success: (res) => {
        const tempFilePath = generateBlobUrl(res);
        resolve({
          tempFilePath,
          errMsg: "compressImage:ok"
        });
      },
      error: reject
    });
  });
};
export {
  compressForH5,
  downloadImage,
  generateBlobUrl,
  saveImageForH5
};
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