ahooks-v2/lib/useCreation/index.js

react hooks library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var react_1 = require("react");

function useCreation(factory, deps) {
  var current = react_1.useRef({
    deps: deps,
    obj: undefined,
    initialized: false
  }).current;

  if (current.initialized === false || !depsAreSame(current.deps, deps)) {
    current.deps = deps;
    current.obj = factory();
    current.initialized = true;
  }

  return current.obj;
}

exports["default"] = useCreation;

function depsAreSame(oldDeps, deps) {
  if (oldDeps === deps) return true;

  for (var i = 0; i < oldDeps.length; i++) {
    if (oldDeps[i] !== deps[i]) return false;
  }

  return true;
}