antd/es/form/hooks/useFrameState.js

An enterprise-class UI design language and React components implementation

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return; var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

import * as React from 'react';
import { useRef } from 'react';
import raf from 'raf';
export default function useFrameState(defaultValue) {
  var _React$useState = React.useState(defaultValue),
      _React$useState2 = _slicedToArray(_React$useState, 2),
      value = _React$useState2[0],
      setValue = _React$useState2[1];

  var frameRef = useRef(null);
  var batchRef = useRef([]);
  var destroyRef = useRef(false);
  React.useEffect(function () {
    return function () {
      destroyRef.current = true;
      raf.cancel(frameRef.current);
    };
  }, []);

  function setFrameValue(updater) {
    if (destroyRef.current) {
      return;
    }

    if (frameRef.current === null) {
      batchRef.current = [];
      frameRef.current = raf(function () {
        frameRef.current = null;
        setValue(function (prevValue) {
          var current = prevValue;
          batchRef.current.forEach(function (func) {
            current = func(current);
          });
          return current;
        });
      });
    }

    batchRef.current.push(updater);
  }

  return [value, setFrameValue];
}