Eslint React Native

validate setting. React-Native is seeing an overwhelming response from the community of mobile app developers around the world. React Native Elements covers a wide variety of use cases, fully functional on iOS and Android. ESLint configuration. Upgrading requires a small amount of effort, but we try to make it easy for you. Custom react-native eslint plugins for internal usage by wix - 1. Since React Native is open-source, the best IDE or editor is the one with the widest deployment. Projects created using Create React App have linting with ESLint already working and configured out of the box with sensible defaults. where my-app is the name of the folder for your application. We will be using examples based on react-dom, but all of these patterns work in other environments like react-native as well. View Luis Augusto Colina Lozito’s profile on LinkedIn, the world's largest professional community. WebStorm offers advanced support for React and JSX. Cross-platform app development by itself is relevant in the industry because of how it allows…. If you don't need React, see eslint-config-airbnb-base. In his day job Hendrik is a full stack coder from Cape Town. com is now LinkedIn Learning! To access Lynda. 0 This website is not affiliated with Stack Overflow. Creating your first React components. This may take a few minutes to. ESlint requires configuration placed inside. At Discord it has brought us incredibly efficiency. on GitHub (npm) Changelog Welcome to the 0. io and push notifications for iOS and Android on two projects. Use a little—or a lot. I was a bit surprised that the React Native project created by react-native-cli doesn’t include eslint support by default. ⏮ Video: https://yo. eslintrc 到项目目录, 内容可参考 react-native 的 package. While you write plain JavaScript and JSX (tag syntax that is an extension to JavaScript) to define how your React Native app should look and behave, the UI is still rendered natively. This cookbook is another milestone on that journey. If you use Vundle, add: Plugin 'mxw/vim-jsx'. This short guide will provide you a consistent and reusable development workflow for all React/React Native projects. Make sure your plugins (and ESLint) are both in your project's package. What’s more: 可以使用pre-commit工具,在每次提交之前运行eslint监测代码,如果失败,则禁止提交。 Debug. Move this file to your project root https:. json as given below. Contributing to React Native Paper Code of Conduct. When I run ESLint, the linter returns no-unused-vars errors for each React component. React specific linting rules for ESLint. Install ESLint either locally or globally. A few years ago Facebook introduced React Native. How do I setup ESlint for react native using Expo or Create-React-Native-App and Prettier? jump to content. The reason why I included “browser: true” is so that the linter doesn’t complaint. Its goal is to provide a pluggable linting utility for JavaScript. 4% of users expressing interest in continuing to develop with Flutter. React, Vue, Angular, React Native and Bootstrap templates and themes to create web apps and speed up development 20+ React Developer Tools to Increase Your Programming Productivity - Flatlogic Blog An opinionated list of 20+ React Developer Tools that will speed up the development process and make you more effective. If you have your eslint configuration saved to another file in your repo, you can configure the engine to use that path instead of the default path:. ESLint is an open source project originally created by Nicholas C. React only writes patch updates to the DOM, but never reads from it. ESLint plugin for React Native. React Native app development has transformed the way apps are built. " in a Component file and hitting "CTRL+SPACE" to trigger the auto-completion. React native debugging After installing the react-native-tools, you should add the configuration settings for the debugger. React Native is an emerging technology and best practices are only beginning to bubble up. The app quickly approached feature parity with the React Native app. Outro detalhe, é que este componente ficou gigante (mais de 100 linhas), mas iremos quebrar ele em menores mais para frente. AtomにlinterとESLintをインストール; 2. ESLint 是一个按照规则给出报告的代码检测工具,使用它可以避免低级错误和统一代码风格,这对公司团队开发非常实用。 1. React guarantees that setState function identity is stable and won’t change on re-renders. vscode安装了react-native-tools插件后,可以代替chromDevTools调试代码。. Zakas in June 2013. Pick a starter project with all the features you need, and none that you don’t. Make sure you have run npm install and all your dependencies are installed. Using react you can build native mobile apps using JavaScript and React. update 2018-05-16:这篇文章比较久了,如果配置完有问题,可参考这篇文章 使用 ESLint && Prettier 规范代码格式 vscode 默认配置对于 react 的 JSX 语法不友好,体现在使用自动格式化或者粘贴后默认缩进错误,尽管可以通过改变 language mode 缓解错误,但更改 language mode 后的格式化依然不够理想。. Visual Studio Code is a source code editor developed by Microsoft. How do I setup ESlint for react native using Expo or Create-React-Native-App and Prettier? jump to content. React Native specific linting rules for ESLint. ESLint Plugin. React Native Flat App Theme is power-packed with Redux, NativeBase and React Navigation. The nice thing about styles in React Native is that everything is JavaScript. Getting started with react-native Remarks. ESLint is an amazing tool that helps you keep your code tiny and clean. Accelerate your Mobile App Development with 12 React Native Tools 1. As a concrete example, in the Emberall app (currently in private beta) we allow users to record personal histories. Install the following packages as dev-dependencies by running the following command: yarn add -D babel-eslint eslint eslint-config-airbnb eslint-plugin-jsx-a11y eslint-plugin-react eslint-plugin-babel eslint-plugin-import. Given this, our editor team will be focusing on leveraging ESLint rather than duplicating work. eslint-plugin-react helps you tune eslint to your needs while using jsx. It’s good to have a common coding convention in project. Call Hooks from React function components. To test a component which use RNCamera, you need to create a react-native-camera. Using react you can build native mobile apps using JavaScript and React. First, we're going to install ESLint. Skip to content. After digging a bit into the source code, I found out that the facebook team has intentionally disabled the feature of overriding eslint rules. It could be much more efficiently dealt with by Facebook directly (and should be). React Native AirBnB ESLint Config. 3 adds support for React Native: you can now run and debug React Native apps in the IDE using a new React Native Run/Debug configurations (you can find out more about it in this blog post). Setup ESLint for React Native in Atom Editor By Freya , last updated September 13, 2017 This tutorial will cover simple steps on how to install and configure linting utility ESLint for JavaScript in Atom Editor for MAC. Functional updates. OK, I Understand. If you don’t have React Native on your system yet, you can easily install it using our React Native Windows installation guide (be sure to do that using the Option #1 – Use React Native CLI) or the official guide, which also contains instruction for non-Windows environments such as Linux, MacOS and so on. Jest - a zero-configuration, ready-to-use tool for testing JS code. Eslint is not new for React Native apps, but I admit that getting eslint to work seamlessly in React Native is not so trivial (yet?) and couldn't find simple documentation on how to do this. eslint-plugin-prettier and prettier (the opinionated code formatter) will work together to lint your files correctly and auto-format your. In Atom Editor I installed the following plugins. yml) configuration file as detailed in ESLint's documentation. Gabriel has 6 jobs listed on their profile. As one of the oldest React libraries, React-Bootstrap has evolved and grown alongside React, making it an excellent choice as your UI foundation. 4% of users expressing interest in continuing to develop with Flutter. View Gabriel Anzaldo Alvarado’s profile on LinkedIn, the world's largest professional community. It’s somewhat opinionated but configurable, and includes starter kits with options to build full-stack or static/client-side apps with the following tools: Express, React, static assets, latest ES, CSS/Sass Modules, Jest, code-splitting, ESLint/Prettier, StyleLint, PostCSS, and inline SVGs. Watch Structor Video Tutorials. From the very beginning, we need to stress that Redux has no relation to React. Sticking with React Native. In many ways, it is similar to JSLint and JSHint with a few exceptions: ESLint uses Espree for JavaScript parsing. yml) configuration file as detailed in ESLint's documentation. These snippets are made to work with the latest ES6 standards, adhere to the airbnb eslint config, and are React/React-Native agnostic. If you don’t have React Native on your system yet, you can easily install it using our React Native Windows installation guide (be sure to do that using the Option #1 – Use React Native CLI) or the official guide, which also contains instruction for non-Windows environments such as Linux, MacOS and so on. React uses JSX (a syntax extension to JavaScript) which can look a little odd at first, however it’s fairly straightforward. " in a Component file and hitting "CTRL+SPACE" to trigger the auto-completion. At Discord it has brought us incredibly efficiency. If you don't specify your custom configuration file we use our default below. better npmなポジションであるyarnを使います。 npmより高速で、きちっとしたバージョン管理が出来ます。 react-native-cli はReact Nativeアプリの作成やコンパイルをするときに使います。. React is a popular JavaScript library developed by Facebook for building web application user interfaces. The React documentation introduces this syntax nicely and has additional information if you want to learn more about React. From the very beginning, we need to stress that Redux has no relation to React. ESLint is a tool for identifying and reporting on patterns found in ECMAScript/JavaScript code. 1 requires a peer of [email protected]^3. Zakas in June 2013. Configuring ESLint. Otherwise, install it locally. Make sure you have run npm install and all your dependencies are installed. After this, add an npm script in your package. A Barcode and QR code UI mask which can be use to render a scanning layout on camera with customizable styling. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. It all depends on your personal taste and the project you're working on. I am using VSCode and a great Linter plugin is ESLint. However, sometimes it’s still useful to know the display orientation of the device. Until now, React Native was lacking such a tool. The recommended way to start building a new React single page application is create-react-app package, which PyCharm downloads and runs for you using npx. Test development for React Native components within Jest is exactly the same as for regular React applications. React Starter Projects These are repositories that you copy and modify to create your own React app. Eslint shareable config allow us to share the same config for multiple projects without need to rewrite for each project. Visual Studio Code is a source code editor developed by Microsoft. ESLint plugin for React Native. If you check my first tutorial on GraphQL, I mentioned that we can implement our own GraphQL server. Add TypeScript files to the eslint. npm WARN [email protected] Subscribe to our Weekly React Native Newsletter to get the best resources on React Native in your inbox each week. You can use React Native today in your existing Android and iOS projects or you can create a whole new app from scratch. React Native has a bunch of tools that every developer needs to select from strategically for react mobile development. Be sure to download eslint-plugin-react for React-specific rules. js Web applications with React UI. Just because React Native made the process. To do so, we ported the existing native Edit Profile view to React Native. Zakas in June 2013. Do not use React. Install ESLint either locally or globally. Luis Augusto has 9 jobs listed on their profile. Usage with React. Conditional rendering in React works the same way conditions work in JavaScript. Installation. For building a front-end responsive email solution using React Native, you have multiple open-source tools like react-html-email and MJML that you can import into your project. React uses JSX (a syntax extension to JavaScript) which can look a little odd at first, however it’s fairly straightforward. Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter. There are additional jsx specific rules the eslint-plugin-react enables. Building upon the foundation set down by eslint-plugin-jsx-a11y, eslint-plugin-react-native-a11y detects a few of the most commonly made accessibility issues found in react native apps. The Visual Studio Code editor supports React. The more effort you put into writing quality code, the less time you spend on debugging. 局部安装eslint npm install --save-dev eslint // 如果项目使用了 React 需要再安一个 babel-eslint npm install --save-dev eslint babel-eslint. Structor replaces the now deprecated React UI Builder. Watch Structor Video Tutorials. ESLint requires configuration via a. React Native. Getting Started with React Native. js file inside your mocks folder on the root of your project with the following content: import React from 'react'; const timeout = ms => new Promise (resolve => setTimeout(resolve, ms)); export class RNCamera extends React. Instead, the virtual DOM is rendered into native iOS or Android views. While you write plain JavaScript and JSX (tag syntax that is an extension to JavaScript) to define how your React Native app should look and behave, the UI is still rendered natively. You can use React Native today in your existing Android and iOS projects or you can create a whole new app from scratch. I am a Native Android developer, i also intermediate in Ionic 2 development can i go with React native development smoothly or it will take more efforts to build any new App for Android and IOS with React Native. Code folding helps you to hide blocks of JSX code that you are not currently working on. NOTE: You can use npm instead. Otherwise, install it locally. I don't know if you like linters, I really appreciated and I think it's important. Because of this, all jQuery functionality has been re-implemented in React. Your team no longer has to build a separate app for both iOS and Android. Now you can see that the debugger will attach to the react native packager itself and run react-native run-android. This is a native component from the React Native package. ESLint is a tool for code validation using specific rules provided by community. This is a summary of the talk I gave at App. This is a highest quality codebase you can get for your next project. Join Samer Buna for an in-depth discussion in this video, Configuring ESLint, part of React Native Essential Training. Configuring the ESLint :: Learn how to use React Native to build production-ready, native mobile apps on both iOS and Android. According to the Stack Overflow Developer Survey 2019 , Flutter ranked as the most loved framework out of the three, with 75. The React documentation introduces this syntax nicely and has additional information if you want to learn more about React. $ yarn flow or $ npm run flow ESLint. React and React Native are just frameworks, and they do not dictate how we should structure our projects. Installation. In this article, we're going to go over the reasons why we should utilize a linter like ESLint and how to customize it with Create React App. With React Native you can build modern mobile apps using JavaScript. To get the syntax highlighting to look right, use mxw's Vim JSX highlighting. This is useful when combined with the env option configuration or js config files. React can also be used to power mobile apps with React Native. Structor : This tool is a user interface builder for node. Fortunately, a growing user community—from tech giants such as Facebook, Yahoo, and Airbnb to the independent developers—is hard at work codifying patterns and best practices for how to use React Native. Setup ESLint for React Native in Atom Editor By Freya , last updated September 13, 2017 This tutorial will cover simple steps on how to install and configure linting utility ESLint for JavaScript in Atom Editor for MAC. React Native完美兼容使用Objective-C、Java或是Swift编写的组件。 如果你需要针对应用的某一部分特别优化,中途换用原生代码编写也很容易。 想要应用的一部分用原生,一部分用React Native也完全没问题 —— Facebook的应用就是这么做的。. React is a popular JavaScript library developed by Facebook for building web application user interfaces. React Native Elements covers a wide variety of use cases, fully functional on iOS and Android. If you really want to configure hundreds of ESLint rules individually, you can always use eslint directly with eslint-config-standard to layer your changes on top. $ yarn flow or $ npm run flow ESLint. In this project-based course, learn how to use React Native to build production-ready, native mobile apps on both iOS and Android. 我们正在构建一个小众社区,大家在这里相互信任,以平等 • 自由 • 奔放的价值观进行分享交流。最终,希望大家能够找到与自己志同道合的伙伴,共同成长。. But, you often get stuck debugging common issues and wasting your creative and productive capacity for the day. 使用VS Code调试React-Native程序,本文介绍使用ViualStudioCode对React-Native程序进行调试的方法。 sudo npm install -g eslint babel-eslint. io Custom react-native eslint plugins for internal usage by wix Toggle navigation. Else the debugging from visual studio code doesn’t work. Add TypeScript files to the eslint. Do you bootstrap your React Native Project in a similar manner? What are your tips and tricks? Looking forward to reading them. Well, imagine you are in a big team and everyone is using a style of code…. This repository is structured like (and contains code from) the excellent eslint-plugin-react. React Native has a bunch of tools that every developer needs to select from strategically for react mobile development. React Native Performance: Major issues and insights on improving your app’s performance Mobility Product Engineering Quick Summary :- React Native is one such application development framework which give developers the speed and agility they desire while developing mobile apps. babelrc (or package. Install the correct versions of each package, which are listed by the command: npm info " [email protected] " peerDependencies. 14 where they split up React into a core library and a DOM adapter (ReactDOM) and (2) remove Bower in favor of npm. This is a native component from the React Native package. Also Webpack needs to know about React (JSX. js JSX ES6 and JSX are awesome, but because they are relatively new, there is little documentation on how to set them up with your environment. Voilà nous en avons terminé avec la configuration d'un nouveau projet React Native avec Expo, TypeScript et ESLint. By using a linter in your React Native project you’ll be able to catch code errors early on and correct them before it’s too late. In this article, we're going to go over the reasons why we should utilize a linter like ESLint and how to customize it with Create React App. After this, add an npm script in your package. This cookbook is another milestone on that journey. Fortunately, a growing user community—from tech giants such as Facebook, Yahoo, and Airbnb to the independent developers—is hard at work codifying patterns and best practices for how to use React Native. Our Professional React Native Developers at Aglowid IT Solutions are absolutely synced with this excellent mobile app development tool. Its goal is to provide a pluggable linting utility for JavaScript. If you don't want to spend time defining all the rules for your project, I recommend the eslint-config-airbnb package, which contains very good rules for writing good React applications. standard-eject can help you migrate from standard to eslint and eslint-config-standard. This is useful when combined with the env option configuration or js config files. Webpack and Babel for React ESLint. React-Bootstrap replaces the Bootstrap JavaScript. Watch Structor Video Tutorials. Conclusion This technology stack has allowed us to quickly create an environment for developing native applications. Editor also highlights the start and the end of the fold so you can easily see where the closing or opening element of your block resides. $ yarn flow or $ npm run flow ESLint. Until now, React Native was lacking such a tool. Our goal will be to disable all formatting rules inside ESLint so that we will only use it for errors, and have Prettier format all our code instead. Try right away, by typing "React. {"_id":"react-native","_rev":"505-a582018f8ccaea7c6af49681ae64d333","name":"react-native","dist-tags":{"latest":"0. yarnとreact-native-cli. ESLint: A pluggable JavaScript linter that natively supports JSX syntax. Installation. While you write plain JavaScript and JSX (tag syntax that is an extension to JavaScript) to define how your React Native app should look and behave, the UI is still rendered natively. React Starter Projects These are repositories that you copy and modify to create your own React app. It's created by Facebook and used for such well-known apps as Instagram, Airbnb, and now JetBrains' own YouTrack mobile app (which is open-source, … Continue reading →. preset field of your package. Since we don’t have ESLint installed. ESLint works with a set of rules you define. از ‌ESLint برای آنالیز سورس کرد به صورت استاتیک و طبق قوانین مشخص شده استفاده می‌شود. This collective supports the team that is developing ESLint. ESLint Setup with. This repository is structured like (and contains code from) the excellent eslint-plugin-react. Optimizing React Native applications is essentially optimizing this bridge communication. io Custom react-native eslint plugins for internal usage by wix Toggle navigation. json file to add some electron helpers. Zakas معرفی شد. ESLint is an open source project originally created by Nicholas C. React specific linting rules for ESLint. For building a front-end responsive email solution using React Native, you have multiple open-source tools like react-html-email and MJML that you can import into your project. React Native specific linting rules for ESLint. Applications can be composed of multiple encapsulated components that manage their own state and efficiently update when data changes. React is a popular JavaScript library developed by Facebook for building web application user interfaces. A few years ago Facebook introduced React Native. It's created by Facebook and used for such well-known apps as Instagram, Airbnb, and now JetBrains' own YouTrack mobile app (which is open-source, … Continue reading →. If it is not already the case you must also configure ESLint to support JSX. js on 4th April 2019. Call Hooks from custom Hooks (we'll learn about them on the next page). Each component has been built from scratch as a true React component, without unneeded dependencies like jQuery. React Native uses a JavaScript class called StyleSheet that resembles normal CSS in many ways, but there are some key differences: camelCase instead of kebab-case for style properties; make use of JavaScript constants and functions to organize and calculate our styles. Configuring ESLint. You can watch the full talk in the video link below. We want this community to be friendly and respectful to each other. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. Troubleshooting React Native Startup. The nice thing about styles in React Native is that everything is JavaScript. They are placed under the src/components folder and simply exports an element from the js file. Let's use a Javascript Linter, Eslint. Test development for React Native components within Jest is exactly the same as for regular React applications. See the complete profile on LinkedIn and. You’ll need to make some changes to your package. Achieving the highest quality without spending a ton of time and money is now possible. React Native allows you to develop native mobile apps for iOS and Android using JavaScript and React. React Native bridges the gap between JS, Android, and iOS. The reason why I included “browser: true” is so that the linter doesn’t complaint. If you also want to do debugging of. If you really want to configure hundreds of ESLint rules individually, you can always use eslint directly with eslint-config-standard to layer your changes on top. json) supports JSX and the ESLint loader from the previous tutorials. React Native. This repository is structured like (and contains code from) the excellent eslint-plugin-react. Ease of use, a modular nature, and a single code base are godsends for mobile app developers. React Native mimics some APIs found in browsers like timers (setInterval, clearInterval, etc…) or Geolocation API. This is a very demanding feature from many of the customers after the success of intelligent voice assistances like Google Home and Amazon Alexa. * (for example. React guarantees that setState function identity is stable and won’t change on re-renders. I was a bit surprised that the React Native project created by react-native-cli doesn't include eslint support by default. To learn about how to test components which uses RNCamera check its documentation about testing. Fortunately, a growing user community—from tech giants such as Facebook, Yahoo, and Airbnb to the independent developers—is hard at work codifying patterns and best practices for how to use React Native. Package for Github's Atom Editor. ESLint plugin for React Native. The rule that fails is a new one, from eslint-plugin-react-native: no-color-literals, because we are using constants in styling, which could prove to be a maintenance headache in the future. ESLint is an open source project originally created by Nicholas C. The more effort you put into writing quality code, the less time you spend on debugging. This will allow VS Code to figure out auto-completion for the built-in React functions. React Native specific linting rules for ESLint. Previously, it was possible to lint scripts with Eslint by using eslint-plugin-html and a number of dirty hacks, but now it's possible to lint Vue files properly. If you check my first tutorial on GraphQL, I mentioned that we can implement our own GraphQL server. Install the correct versions of each package, which are listed by the command: npm info " [email protected] " peerDependencies. Pro tip: Just use standard and move on. The current set of rules that create-react-app uses are coming from eslint-config-react-app NPM package. js IntelliSense and code navigation out of the box. We will set this up so that Prettier will be our main extension for code formatting (based on the ESLint rules we define). As a concrete example, in the Emberall app (currently in private beta) we allow users to record personal histories. You’ll start by getting a clear understanding of what React Native is and how it works. json as devDependencies (or dependencies, if your project uses ESLint at runtime). Setting up linting and auto-completion of TypeScript code for. Conclusion This technology stack has allowed us to quickly create an environment for developing native applications. I've been learning React, a JavaScript library by Facebook for building user interfaces, for the past few days during my commute—it's been challenging, but a lot of fun. Setup ESLint for React Native in Atom Editor By Freya , last updated September 13, 2017 This tutorial will cover simple steps on how to install and configure linting utility ESLint for JavaScript in Atom Editor for MAC. eslint: react/prefer-es6-class react/prefer-stateless-function. NET, but the last few years he spent most of his time with JavaScript. eslintrc config, and I'm ready to go. ts-jest is necessary only if you’re going to use jest for testing. Add TypeScript files to the eslint. ESLint works with a set of rules you define. We're going from soup-to-nuts with fundamental and advanced concepts with the latest features. 3 adds support for React Native: you can now run and debug React Native apps in the IDE using a new React Native Run/Debug configurations (you can find out more about it in this blog post). If you use Vundle, add: Plugin 'mxw/vim-jsx'. React Native is still a bit slower than purely native. Badass React Snippets. A Visual Studio Code extension that provides a development environment for React Native projects. Achieving the highest quality without spending a ton of time and money is now possible. First, we're going to install ESLint. yarn add --dev eslint babel-eslint eslint-config-airbnb eslint-plugin-flowtype eslint-plugin-import eslint-plugin-jsx-a11y eslint-plugin-react. This is a summary of the talk I gave at App. eslint-config-airbnbのパッケージをインストール; 3. This may take a few minutes to. react-native-photo-grid ★31 - React Native component that handles the complexities of building a grid of photos with a flexible number of photos per row. React is a JavaScript library for building user interfaces. However, before looking at specific errors, make sure you have configured your development environment correctly. WebStorm offers advanced support for React and JSX. For a React Native project, we will rely on ESLint, and this is how we are going to do it: 1. Luis Augusto has 9 jobs listed on their profile. Install the following packages as dev-dependencies by running the following command: yarn add -D babel-eslint eslint eslint-config-airbnb eslint-plugin-jsx-a11y eslint-plugin-react eslint-plugin-babel eslint-plugin-import. Linting the HTML structure and styles was largely ignored, as well, until now. Make sure your plugins (and ESLint) are both in your project's package. Learn More About Android, React Native, and Secure User Management. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: