web-utils-super/domToBase64.js

前端函数库

/**
 * @desc: 截图 返回图片base64链接(只能img标签)
 * @param {String} id
 * @param {Number} height
 * @param {Number} width
 * @return {String} base64
 */
function domToBase64(id, height, width) {
  const dom = document.getElementById(id);
  dom.setAttribute("crossOrigin", "anonymous"); // 添加srossOrigin属性，解决跨域问题
  const canvas = document.createElement("canvas");
  canvas.width = height || dom.clientWidth;
  canvas.height = width || dom.clientHeight;
  canvas.getContext("2d").drawImage(dom, 0, 0, canvas.width, canvas.height); // 截
  return canvas.toDataURL("image/png"); // 将图片转成base64格式
}

module.exports = domToBase64;