flow-typed | 易学教程

Create React App doesn't strip Flow types inside node_modules directory

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问题 I've created new React app using create-react-app@1.4.3 . And my app depends on NPM module which contains several Flow typed JSX files (retail-ui). App.js of my React app: import React, { Component } from 'react'; import Button from "retail-ui/components/Button"; import './App.css'; export default class App extends Component { render() { return ( <div> <Button>First button</Button> <Button>Second button</Button> </div> ); } } Head of retail-ui/components/Button: // @flow import events from

Flowtype: How to use compute method in Class

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问题 I wanna visit the class property according the params as the following code: class Commander { constructor() {} create() {} test() {} undo() {} redo() {} execute(...args): void { const command: string = args.slice(0); const rest: any[] = args.slice(1); this[command].apply(this, rest); } } But I got an error as below: Cannot get this[command] because an indexer property is missing in Commander 1. More info you can see the flowtype try. If I make some stupid things, and please let me know!

Flowtype: How to use compute method in Class

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Flow Type refinement by checking for existing properties

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问题 Here is the example given below in try flowtype export type TimeLineCourseType = { date: string, done: boolean, category_name: string, }; export type TimeLineCatType = { date: string, done: boolean, rank_in_week: number, }; export type TimeLineStatsType = { date: string, timespan: string }; const displayTimelineItem = (item: TimeLineCourseType | TimeLineCatType | TimeLineStatsType, i: number) => { if (item.category_name) { return ( item.playlist_name, item.category_name ); } else if (item

Flow Type refinement by checking for existing properties

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should you publish your flow-typed folder to NPM?

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问题 I'm wondering if and under what conditions you should publish your flow-typed folder to NPM in your packages. Perhaps (and what I've been thinking) the answer is never, and it's up to application developers to use flow-typed themselves, but perhaps flow-typed install only picks up definitions for dependencies they have declared themselves, rather than dependencies within packages. So in short, if your package has non-peer flow-typed dependencies, should I be publishing my flow-typed folder or

Flow Type refinement by checking for existing properties

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Here is the example given below in try flowtype export type TimeLineCourseType = { date: string, done: boolean, category_name: string, }; export type TimeLineCatType = { date: string, done: boolean, rank_in_week: number, }; export type TimeLineStatsType = { date: string, timespan: string }; const displayTimelineItem = (item: TimeLineCourseType | TimeLineCatType | TimeLineStatsType, i: number) => { if (item.category_name) { return ( item.playlist_name, item.category_name ); } else if (item.rank_in_week) { return ( item.rank_in_week ); } else { return (item.timespan); } }; It is clear from the