linkmore-design/es/lm-upload/utils.js

🌈 🚀lm组件库。🚀

import _typeof from "@babel/runtime/helpers/esm/typeof";
import React from 'react';

// 检查是否存在内容
export function getIsHas(val) {
  // 检查是否数字类型, 是否布尔类型
  var flag = !!val || typeof val === 'number' || typeof val === 'boolean';
  // 检查空对象和空数组
  if (!!val && _typeof(val) === 'object') {
    var _Object$keys;
    flag = Array.isArray(val) ? !!val.length : !!((_Object$keys = Object.keys(val)) !== null && _Object$keys !== void 0 && _Object$keys.length);
  }
  return flag;
}

// 检查是否类组件
export function isClassComponent(component) {
  return typeof component === 'function' && function () {
    var proto = Object.getPrototypeOf(component);
    return proto.prototype && proto.prototype.isReactComponent;
  }();
}

// 检查是否自定义组件
export function isExoticComponent(component) {
  return _typeof(component) === 'object' && _typeof(component.$$typeof) === 'symbol' && ['react.memo', 'react.forward_ref'].includes(component.$$typeof.description);
}

// 检查是否React组件
export function isReactComponent(component) {
  return isClassComponent(component) || typeof component === 'function' || isExoticComponent(component);
}
export var render = function render(Comp, props) {
  return !Comp ? null : isReactComponent(Comp) ? /*#__PURE__*/React.createElement(Comp, props) : Comp;
};

/*
 * 将上传的图片转换为可展示的形式
 * getBase64(file, (img) => {})
 */
export var getBase64 = function getBase64(img, callback) {
  var reader = new FileReader();
  reader.addEventListener('load', function () {
    return callback(reader.result);
  });
  reader.readAsDataURL(img);
};