useRafInterval.js

"use strict";

exports.__esModule = true;
exports.default = void 0;

var _react = require("react");

var _useCommittedRef = _interopRequireDefault(require("./useCommittedRef"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function useRafInterval(fn, ms, paused) {
  if (paused === void 0) {
    paused = false;
  }

  var handle;
  var start = new Date().getTime();
  var fnRef = (0, _useCommittedRef.default)(fn); // this ref is necessary b/c useEffect will sometimes miss a paused toggle
  // orphaning a setTimeout chain in the aether, so relying on it's refresh logic is not reliable.

  var pausedRef = (0, _useCommittedRef.default)(paused);

  function loop() {
    var current = new Date().getTime();
    var delta = current - start;
    if (pausedRef.current) return;

    if (delta >= ms && fnRef.current) {
      fnRef.current();
      start = new Date().getTime();
    }

    cancelAnimationFrame(handle);
    handle = requestAnimationFrame(loop);
  }

  (0, _react.useEffect)(function () {
    handle = requestAnimationFrame(loop);
    return function () {
      return cancelAnimationFrame(handle);
    };
  }, []);
}

var _default = useRafInterval;
exports.default = _default;