antd/lib/_util/ref.js

An enterprise-class UI design language and React components implementation

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.fillRef = fillRef;
exports.composeRef = composeRef;
exports.usePrevious = usePrevious;

var React = _interopRequireWildcard(require("react"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

function fillRef(ref, node) {
  if (typeof ref === 'function') {
    ref(node);
  } else if (_typeof(ref) === 'object' && ref && 'current' in ref) {
    ref.current = node;
  }
}

function composeRef() {
  for (var _len = arguments.length, refs = new Array(_len), _key = 0; _key < _len; _key++) {
    refs[_key] = arguments[_key];
  }

  return function (node) {
    refs.forEach(function (ref) {
      fillRef(ref, node);
    });
  };
}

function usePrevious(value) {
  var ref = React.useRef();
  React.useEffect(function () {
    ref.current = value;
  }, [value]);
  return ref.current;
}