@fluent-windows/hooks/useUpdateEffect/useUpdateEffect.js

Fluent-Windows React hooks.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

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; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { 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; }

/**
 * React effect hook that ignores the first invocation (e.g. on mount). The signature is exactly the same as the useEffect hook.
 *
 * Demo
 * import { useUpdateEffect } from '@fluent-windows/hooks'
 *
  const [count, setCount] = React.useState(0);
  
  React.useEffect(() => {
    const interval = setInterval(() => {
      setCount(count => count + 1)
    }, 1000)
    
    return () => {
      clearInterval(interval)
    }
  }, [])
  
  useUpdateEffect(() => {
    console.log('count', count) // will only show 1 and beyond
    
    return () => {
      // do something on unmount
    }
  })
 */
function useUpdateEffect(effect, deps) {
  var isInitialMount = React.useRef(true);
  React.useEffect(function () {
    if (isInitialMount.current) {
      isInitialMount.current = false;
    } else {
      return effect();
    }
  }, deps); // eslint-disable-line
}

var _default = useUpdateEffect;
exports["default"] = _default;