KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use getNextHook method in storybook-root

Best JavaScript code snippet using storybook-root

hooks.ts

Source:hooks.ts

...69    });70    this.init();71    this.removeRenderListeners();72  }73  getNextHook() {74    const hook = this.currentHooks[this.nextHookIndex];75    this.nextHookIndex += 1;76    return hook;77  }78  triggerEffects() {79    // destroy removed effects80    this.prevEffects.forEach(effect => {81      if (!this.currentEffects.includes(effect) && effect.destroy) {82        effect.destroy();83      }84    });85    // trigger added effects86    this.currentEffects.forEach(effect => {87      if (!this.prevEffects.includes(effect)) {88        // eslint-disable-next-line no-param-reassign89        effect.destroy = effect.create();90      }91    });92    this.prevEffects = this.currentEffects;93    this.currentEffects = [];94  }95  addRenderListeners() {96    this.removeRenderListeners();97    const channel = addons.getChannel();98    RenderEvents.forEach(e => channel.on(e, this.renderListener));99  }100  removeRenderListeners() {101    const channel = addons.getChannel();102    RenderEvents.forEach(e => channel.removeListener(e, this.renderListener));103  }104}105const hookify = (fn: AbstractFunction) => (...args: any[]) => {106  const { hooks }: StoryContext = typeof args[0] === 'function' ? args[1] : args[0];107  const prevPhase = hooks.currentPhase;108  const prevHooks = hooks.currentHooks;109  const prevNextHookIndex = hooks.nextHookIndex;110  const prevDecoratorName = hooks.currentDecoratorName;111  hooks.currentDecoratorName = fn.name;112  if (hooks.prevMountedDecorators.has(fn)) {113    hooks.currentPhase = 'UPDATE';114    hooks.currentHooks = hooks.hookListsMap.get(fn) || [];115  } else {116    hooks.currentPhase = 'MOUNT';117    hooks.currentHooks = [];118    hooks.hookListsMap.set(fn, hooks.currentHooks);119    hooks.prevMountedDecorators.add(fn);120  }121  hooks.nextHookIndex = 0;122  const prevContext = window.STORYBOOK_HOOKS_CONTEXT;123  window.STORYBOOK_HOOKS_CONTEXT = hooks;124  const result = fn(...args);125  window.STORYBOOK_HOOKS_CONTEXT = prevContext;126  if (hooks.currentPhase === 'UPDATE' && hooks.getNextHook() != null) {127    throw new Error(128      'Rendered fewer hooks than expected. This may be caused by an accidental early return statement.'129    );130  }131  hooks.currentPhase = prevPhase;132  hooks.currentHooks = prevHooks;133  hooks.nextHookIndex = prevNextHookIndex;134  hooks.currentDecoratorName = prevDecoratorName;135  return result;136};137// Counter to prevent infinite loops.138let numberOfRenders = 0;139const RENDER_LIMIT = 25;140export const applyHooks = (141  applyDecorators: (getStory: StoryGetter, decorators: Decorator[]) => StoryGetter142) => (getStory: StoryGetter, decorators: Decorator[]) => {143  const decorated = applyDecorators(hookify(getStory), decorators.map(hookify));144  return (context: StoryContext) => {145    const { hooks } = context;146    hooks.prevMountedDecorators = hooks.mountedDecorators;147    hooks.mountedDecorators = new Set([getStory, ...decorators]);148    hooks.currentContext = context;149    hooks.hasUpdates = false;150    let result = decorated(context);151    numberOfRenders = 1;152    while (hooks.hasUpdates) {153      hooks.hasUpdates = false;154      hooks.currentEffects = [];155      result = decorated(context);156      numberOfRenders += 1;157      if (numberOfRenders > RENDER_LIMIT) {158        throw new Error(159          'Too many re-renders. Storybook limits the number of renders to prevent an infinite loop.'160        );161      }162    }163    hooks.addRenderListeners();164    return result;165  };166};167const areDepsEqual = (deps: any[], nextDeps: any[]) =>168  deps.length === nextDeps.length && deps.every((dep, i) => dep === nextDeps[i]);169const invalidHooksError = () =>170  new Error('Storybook preview hooks can only be called inside decorators and story functions.');171function getHooksContextOrNull(): HooksContext | null {172  return window.STORYBOOK_HOOKS_CONTEXT || null;173}174function getHooksContextOrThrow(): HooksContext {175  const hooks = getHooksContextOrNull();176  if (hooks == null) {177    throw invalidHooksError();178  }179  return hooks;180}181function useHook(name: string, callback: (hook: Hook) => void, deps?: any[] | undefined): Hook {182  const hooks = getHooksContextOrThrow();183  if (hooks.currentPhase === 'MOUNT') {184    if (deps != null && !Array.isArray(deps)) {185      logger.warn(186        `${name} received a final argument that is not an array (instead, received ${deps}). When specified, the final argument must be an array.`187      );188    }189    const hook: Hook = { name, deps };190    hooks.currentHooks.push(hook);191    callback(hook);192    return hook;193  }194  if (hooks.currentPhase === 'UPDATE') {195    const hook = hooks.getNextHook();196    if (hook == null) {197      throw new Error('Rendered more hooks than during the previous render.');198    }199    if (hook.name !== name) {200      logger.warn(201        `Storybook has detected a change in the order of Hooks${202          hooks.currentDecoratorName ? ` called by ${hooks.currentDecoratorName}` : ''203        }. This will lead to bugs and errors if not fixed.`204      );205    }206    if (deps != null && hook.deps == null) {207      logger.warn(208        `${name} received a final argument during this render, but not during the previous render. Even though the final argument is optional, its type cannot change between renders.`209      );...

hooks.js

Source:hooks.js

...52var hookListsMap = new WeakMap();53var mountedDecorators = new Set();54var currentHooks = [];55var nextHookIndex = 0;56var getNextHook = function getNextHook() {57  var hook = currentHooks[nextHookIndex];58  nextHookIndex += 1;59  return hook;60};61var currentPhase = 'NONE';62var currentEffects = [];63var prevEffects = [];64var currentDecoratorName = null;65var hasUpdates = false;66var currentContext = null;67var triggerEffects = function triggerEffects() {68  // destroy removed effects69  prevEffects.forEach(function (effect) {70    if (!currentEffects.includes(effect) && effect.destroy) {71      effect.destroy();72    }73  }); // trigger added effects74  currentEffects.forEach(function (effect) {75    if (!prevEffects.includes(effect)) {76      // eslint-disable-next-line no-param-reassign77      effect.destroy = effect.create();78    }79  });80  prevEffects = currentEffects;81  currentEffects = [];82};83var hookify = function hookify(fn) {84  return function () {85    var prevPhase = currentPhase;86    var prevHooks = currentHooks;87    var prevNextHookIndex = nextHookIndex;88    var prevDecoratorName = currentDecoratorName;89    currentDecoratorName = fn.name;90    if (mountedDecorators.has(fn)) {91      currentPhase = 'UPDATE';92      currentHooks = hookListsMap.get(fn) || [];93    } else {94      currentPhase = 'MOUNT';95      currentHooks = [];96      hookListsMap.set(fn, currentHooks);97    }98    nextHookIndex = 0;99    var result = fn.apply(void 0, arguments);100    if (currentPhase === 'UPDATE' && getNextHook() != null) {101      throw new Error('Rendered fewer hooks than expected. This may be caused by an accidental early return statement.');102    }103    currentPhase = prevPhase;104    currentHooks = prevHooks;105    nextHookIndex = prevNextHookIndex;106    currentDecoratorName = prevDecoratorName;107    return result;108  };109}; // Counter to prevent infinite loops.110var numberOfRenders = 0;111var RENDER_LIMIT = 25;112var applyHooks = function applyHooks(applyDecorators) {113  return function (getStory, decorators) {114    var decorated = applyDecorators(hookify(getStory), decorators.map(hookify));115    return function (context) {116      currentContext = context;117      hasUpdates = false;118      var result = decorated(context);119      mountedDecorators = new Set([getStory].concat(_toConsumableArray(decorators)));120      numberOfRenders = 1;121      while (hasUpdates) {122        hasUpdates = false;123        result = decorated(context);124        numberOfRenders += 1;125        if (numberOfRenders > RENDER_LIMIT) {126          throw new Error('Too many re-renders. Storybook limits the number of renders to prevent an infinite loop.');127        }128      }129      triggerEffects();130      currentContext = null;131      return result;132    };133  };134};135exports.applyHooks = applyHooks;136var areDepsEqual = function areDepsEqual(deps, nextDeps) {137  return deps.length === nextDeps.length && deps.every(function (dep, i) {138    return dep === nextDeps[i];139  });140};141function useHook(name, callback, deps) {142  if (currentPhase === 'MOUNT') {143    if (deps != null && !Array.isArray(deps)) {144      _clientLogger.logger.warn("".concat(name, " received a final argument that is not an array (instead, received ").concat(deps, "). When specified, the final argument must be an array."));145    }146    var _hook = {147      name: name,148      deps: deps149    };150    currentHooks.push(_hook);151    callback(_hook);152    return _hook;153  }154  if (currentPhase === 'UPDATE') {155    var _hook2 = getNextHook();156    if (_hook2 == null) {157      throw new Error('Rendered more hooks than during the previous render.');158    }159    if (_hook2.name !== name) {160      _clientLogger.logger.warn("Storybook has detected a change in the order of Hooks".concat(currentDecoratorName ? " called by ".concat(currentDecoratorName) : '', ". This will lead to bugs and errors if not fixed."));161    }162    if (deps != null && _hook2.deps == null) {163      _clientLogger.logger.warn("".concat(name, " received a final argument during this render, but not during the previous render. Even though the final argument is optional, its type cannot change between renders."));164    }165    if (deps != null && _hook2.deps != null && deps.length !== _hook2.deps.length) {166      _clientLogger.logger.warn("The final argument passed to ".concat(name, " changed size between renders. The order and size of this array must remain constant.\nPrevious: ").concat(_hook2.deps, "\nIncoming: ").concat(deps));167    }168    if (deps == null || _hook2.deps == null || !areDepsEqual(deps, _hook2.deps)) {169      callback(_hook2);...

index.js

Source:index.js

...24    this.hookCursor += 1;25    return [this.context, this.hookCursor];26  },27  useState: defaultValue => {28    const [hookContext, hookNumber] = this.getNextHook();29    const setValue = value => {30      hookContext.setState({31        [hookNumber]: value32      });33    };34    return [hookContext.state[hookNumber] || defaultValue, setValue];35  },36  useEffect: (effectFn, firesOn) => {37    const [hookContext, hookNumber] = this.getNextHook();38    if (39      !hookContext._effects[hookNumber] ||40      !firesOn ||41      (firesOn &&42        hookContext._effects[hookNumber].firesOn &&43        firesOn.some((value, index) => value !== hookContext._effects[hookNumber].firesOn[index]))44    ) {45      requestAnimationFrame(() => {46        hookContext._effects[hookNumber] = hookContext._effects[hookNumber] || {};47        hookContext._effects[hookNumber].cleanup = effectFn();48        hookContext._effects[hookNumber].firesOn = firesOn;49      });50    }51  },52  useLayoutEffect: (effectFn, firesOn) => {53    // TODO: Make this fire at the right time54    this.useEffect(effectFn, firesOn);55  },56  useContext: context => {57    // const [ hookContext ] = this.getNextHook();58    // context.findProvider(hookContext);59    // TODO60  },61  useRef: defaultValue => {62    const [hookContext, hookNumber] = this.getNextHook();63    if (!hookContext._refs[hookNumber]) {64      function setRef(ref) {65        setRef.current = ref;66      }67      setRef.current = defaultValue;68      hookContext._refs[hookNumber] = setRef;69    }70    return hookContext._refs[hookNumber];71  },72  useMemo: (fn, changesOn) => {73    const [hookContext, hookNumber] = this.getNextHook();74    if (75      !hookContext._memos[hookNumber] ||76      !changesOn ||77      (changesOn &&78        hookContext._memos[hookNumber].changesOn &&79        changesOn.some((value, index) => value !== hookContext._memos[hookNumber].changesOn[index]))80    ) {81      hookContext._memos[hookNumber] = hookContext._memos[hookNumber] || {};82      hookContext._memos[hookNumber].value = fn();83      hookContext._memos[hookNumber].changesOn = changesOn;84    }85    return hookContext._memos[hookNumber].value;86  },87  useCallback: (fn, changesOn) => {...

Using AI Code Generation

1import { StorybookRoot } from 'storybook-root';2const storybookRoot = new StorybookRoot();3const nextHook = storybookRoot.getNextHook();4import { StorybookRoot } from 'storybook-root';5const storybookRoot = new StorybookRoot();6const nextHook = storybookRoot.getNextHook();7import { StorybookRoot } from 'storybook-root';8const storybookRoot = new StorybookRoot();9const nextHook = storybookRoot.getNextHook();10import { StorybookRoot } from 'storybook-root';11const storybookRoot = new StorybookRoot();12const nextHook = storybookRoot.getNextHook();13import { StorybookRoot } from 'storybook-root';14const storybookRoot = new StorybookRoot();15const nextHook = storybookRoot.getNextHook();16import { StorybookRoot } from 'storybook-root';17const storybookRoot = new StorybookRoot();18const nextHook = storybookRoot.getNextHook();19import { StorybookRoot } from 'storybook-root';20const storybookRoot = new StorybookRoot();21const nextHook = storybookRoot.getNextHook();22import { StorybookRoot } from 'storybook-root';23const storybookRoot = new StorybookRoot();24const nextHook = storybookRoot.getNextHook();25import { StorybookRoot } from 'storybook-root';26const storybookRoot = new StorybookRoot();27const nextHook = storybookRoot.getNextHook();28import { StorybookRoot } from 'storybook-root';29const storybookRoot = new StorybookRoot();30const nextHook = storybookRoot.getNextHook();

Using AI Code Generation

1const nextHook = require('storybook-root').getNextHook;2const getStorybook = require('storybook-root').getStorybook;3const getStorybook = require('storybook-root').getStorybook;4const getStorybook = require('storybook-root').getStorybook;5const getStorybook = require('storybook-root').getStorybook;6const getStorybook = require('storybook-root').getStorybook;7const getStorybook = require('storybook-root').getStorybook;8const getStorybook = require('storybook-root').getStorybook;9const getStorybook = require('storybook-root').getStorybook;

Using AI Code Generation

1import { getNextHook } from 'storybook-root'2export default class Test {3  constructor() {4    this.hook = getNextHook()5  }6}7import React from 'react'8import { configure, addDecorator } from '@storybook/react'9import { setNextHook } from 'storybook-root'10const req = require.context('../src', true, /\.stories\.js$/)11function loadStories() {12  req.keys().forEach(filename => req(filename))13}14addDecorator((story, context) => {15  setNextHook(context.hook)16  return story()17})18configure(loadStories, module)19const path = require('path')20module.exports = {21  resolve: {22    alias: {23      'storybook-root': path.resolve(__dirname, '../src')24    }25  }26}27import Test from './test'28import { getNextHook } from 'storybook-root'29export default class Test {30  constructor() {31    this.hook = getNextHook()32  }33}34import React from 'react'35import { storiesOf } from '@storybook/react'36import Test from './test'37storiesOf('Test', module).add('default', () => <Test />)

Using AI Code Generation

1import { getNextHook } from 'storybook-root-cause';2const { hookName, args } = getNextHook();3import { renderHook } from '@testing-library/react-hooks';4import { useHook } from './test.js';5import { getStorybookHooks, setStorybookHooks } from 'storybook-root-cause';6test('should render the hook', () => {7  const { result } = renderHook(() => useHook());8  const storybookHooks = getStorybookHooks();9  setStorybookHooks([...storybookHooks, { hookName: 'useHook', args: result.current }]);10});11import { useHook } from './test.js';12import { getStorybookHooks } from 'storybook-root-cause';13export const Example = () => {14  const { hookName, args } = getStorybookHooks()[0];15  useHook(...args);16};17module.exports = {18};

Using AI Code Generation

1const { getNextHook } = require("storybook-root-cause");2const { getHooks } = require("storybook-root-cause");3const { getEffects } = require("storybook-root-cause");4const { getEffects } = require("storybook-root-cause");5const { getEffects } = require("storybook-root-cause");6const { getEffects } = require("storybook-root-cause");7const { getEffects } = require("storybook-root-cause");

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.