Typescript Tutorial 2019

TypeScript is a typed superset of JavaScript, developed by Microsoft, that can check errors before an app is even running and provides superior autocomplete functionality for development. However, you may. It is targeted towards developers who are want to learn these two important tools of ReactJS development. History of Typescript. As an analogy, if JavaScript were CSS then TypeScript would be SCSS. It's available for public testing and you can try it out now: npm install -g [email protected]. This will be beginner level tutorial where you’ll learn how to set an express app server with a couple of routes in TypeScript. It is done with the help of a method called Trans-Piled. Uncle Bob refers to this as the Single Responsibility Principle and SRP is mentioned frequently in React. It includes both the TypeScript experience for Visual Studio and a standalone compiler that …Debug server-side script. Typescript is a superset of javascript and it adds. The TypeScript Language Service –The "Language Service" disclose an additional layer around the core compiler pipeline that act as editor-like applications. My hopes are for higher code quality and predictability, and for the benefits of code editor suggestions :). Here comes 2019's release schedule, with so many interesting and amazing titles to choose from, it's hard to keep track. 10/04/2019; 21 minutes to read +5; In this article. TypeScript is what C# developers wished for Javascript. For some developers, working with TypeScript provides better tools and options than just JavaScript by itself. Firstly, you need to install typescript in your machine. If you think the following courses is the Best Typescript Tutorial, Training and Course 2019. My favourite is TypeScript, but React Native supports Flow out of the box. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. However, some interfaces in Angular does not have the prefix "I". Choose the path to the relevant package in the dialog that opens. A results-driven, customer-focused, articulate and analytical Software Engineer who can think “out of the box”. TypeScript is an open-source object-oriented language maintained by Microsoft. Azure DevOps Server Express is a free, source code-control platform for individual developers and small teams of five or less. JavaScript, as we know, does not support enums but TypeScript helps us access them; TypeScript enums save runtime and compile time with inline code in JavaScript, (which we will see later in this article) TypeScript enums also provide a certain flexibility that we previously had only in languages like Java. Support for other editors will likely be rolling in in the near future. Tutorial Getting Intimate with Angular and TypeScript If you are putting off getting into Angular, this gentle tutorial will pull you in and help you never look back. An interesting compromise that may suit some setups or if you want to 'try out' static typing without going all in. This is a version of Mads Kristensen's Web Analyzer for Visual Studio 2015. Typescript fundamentals 2. Application Setup. You can use this client in your Angular 2 SPA (single-page application) to consume the web services of an existing Web API project. Webpack enables developers to bundle and build the client-side resources of a web app. TypeScript is JavaScript for application-scale development. JavaScript! We all love it. Typescript Tutorial: A Video List Covering ES6 Features, Debugging, Typings and Some Of The Most Useful Type System Features Last Updated: 26 April 2019 local_offer Typescript In this post, we are going to present a series of video tutorials that cover some very commonly used Typescript features. > Angular Framework is different from AngularJS. Bill is like me in at least one way - he loves TypeScript and Angular 2. We will discuss how to create date object in TypeScript. I can't ever go back to coding vanilla Javascript after familiarizing with Typescript. This is a standalone, power tool release of TypeScript for Visual Studio 2017 and 2019. js, and TypeScript - part 1 - setup…. Okay, I’ll grant you it is a lot more code. A results-driven, customer-focused, articulate and analytical Software Engineer who can think "out of the box". There is an easier way. Here are some benefits of using TypeScript: Optional static typing. To install TypeScript you need first Node. Follow these installation instructions: Install Node Package Manager (npm). One of the big benefits is to enable IDEs to provide a richer environment for spotting common errors as you type the code. If you don’t want to use TypeScript in this project, omit the --typescript flag. TypeScript is both a language and a set of tools. In this first step we don't. As such, a JavaScript program is also a valid TypeScript program, and a TypeScript program can seamlessly consume JavaScript. Here are some benefits of using TypeScript: Optional static typing. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. In this TypeScript tutorial we focus on cool features like classes, as well as interfaces and arrow functions, which were introduced in ECMAScript 6. But you could also work with real classes so that the objects retrieved from the database will be actual instances of the class you have defined in typescript. This Babel preset was a year long collaboration, and their new focus is on improving ESLint integration. TypeScript has most of the features of Object Oriented languages like C# and Java. January 7, 2019. Posted on January 17, 2019 January 17, 2019 by getalltechnology Python Task Scheduler Python Task Scheduler Tutorial, There is increasing interest in the creation of bots and other monitoring and Continue reading. Select: choose this option to use a custom typescript package instead of the one bundled with IntelliJ IDEA. Here we will explore an opinionated approach to setting up Electron: TypeScript, React and Webpack. TypeScript tutorial in Visual Studio Code. Set in Typescript. If you are new to typescript, watch this tutorial which covers the basics of TypeScript. 2-5 December 2019, Prague, Czech Republic. This tutorial is part of a series. The language service supports the common set of typical editor operations like statement completions, signature help, code formatting and outlining, colorization, etc. Now that we know the inspiration behind TypeScript and the various advantages it provides to build large scale applications, let us look into how to install and setup TypeScript in the next tutorial. Although TypeScript was developed by Microsoft and comes standard with Visual Studio (an IDE software), it can be used in any environment. This entry is part 6 of 12 in the TypeScript Express tutorial. Why use TypeScript (in React) Recognize those silly errors. TestCafe allows you to write tests with TypeScript - a typed superset of JavaScript. This list includes both free and paid resources to help you learn Visual Studio. We can use the same JSON. NET Core app with client-side scripting done in TypeScript. Set in Typescript. TypeScript is developed and maintained by Microsoft. You can learn TypeScript programming through video or book tutorials and courses as per your choice. Welcome to the Angular Tutorial. Introduction. As well as this, adopting TypeScript is easy as files can be incrementally upgraded without causing issues throughout the rest of your project. I'm a developer advocate and a backend developer, and my frontend development expertise is relatively weak. Text content is released under Creative Commons BY-SA. It is done with the help of a method called Trans-Piled. A developer provides a tutorial on how to work with the TypeScript language, specifically how to work with classes and interfaces, and extend interfaces. A typescript is a superset of JavaScript where it compiles down into plain JavaScript. My favourite is TypeScript, but React Native supports Flow out of the box. Courses are submitted and voted on by developers, enabling you to find the best TypeScript courses and resources. Experimental. Select: choose this option to use a custom typescript package instead of the one bundled with IntelliJ IDEA. In this tutorial, we are going to be looking at how you can use both the async and await keywords within your TypeScript application and subsequently improve the readibility and succinctness of your code. ©2019 C# Corner. This is a smart move — leverage the features, community, and plugins of existing tools. The main difference that sets TypeScript apart from JavaScript is that it adds explicit typing. TypeScript is a language for application-scale JavaScript development. PS 2: I love TypeScript. Every TypeScript example and tutorial I have found thus far is about language features, Static typing, Visual Studio, etc. log and document. 2019 is going to be a year of typescript for me for sure. Angular 4 is a complete and flexible application framework, mainly maintained by Google and a very active community. TypeScript is a typed superset of JavaScript. How to serve a React and a server-side backend app from the same origin, without having to use CORS on the server and worrying about ports. TypeScript is a typed superset of JavaScript compiled to JavaScript. Interface in Typescript is used to tell the compiler what the shape of the JS object should look like. json in typescript-library. TypeScript also has a package which can be used in Node. Downloading for Visual Studio 2019 and Visual Studio 2017 (15. This TypeScript tutorial helps you to learn TypeScript in an easy way. TypeScript gives us user-friendly errors during compile time. Visual Studio allows you to easily create a Node. TypeScript on the Server - article about server side frameworks for TypeScript NestJS - a framework for serverside TypeScript development TypeORM - an ORM written in TypeScript (Github Repo) TypeScript in Angular. js tutorial. Experimental. 0 is a framework of JavaScript written in TypeScript. js so I can't help you with that, but you could try follow the suggestions in that Github link. Angular training in mumbai. There are many tutorials and examples available online which makes your learning easier. Bundling combines multiple files into a. By the end of the article, I will have configured and used TypeScript to. Net gives you. We'll leave just some of the configuration options, removing everything else. Front-end with TypeScript Tutorial – Step 1 to 3: Minimal TypeScript Posted by Bogdán Bikics on October 27, 2016 Now that we know the basics of NPM, Gulp and TypeScript , let’s start our step-by-step tutorial. So now that we have completed all the prerequisites it’s time to start getting in to Angular. If you buy something we get a small commission at no extra charge to you. The Formik source code is written in TypeScript, so you can rest easy that Formik's types will always be up-to-date. The language designers didn’t try to invent anything, so one doesn’t need much time to get started with TypeScript. io can guide you through TypeScript basics using courses submitted and recommended by the community members. This article is part of a series starting with Web Components in 2019: Part 1. Okay, with the formalities out of the way, we can finally get to the meat of the tutorial. TypeScript to JavaScript: TypeScript code can be converted into JavaScript and thus it can be understood by the browser. In this article, I look at the steps required to get TypeScript up and running in the context of a Razor Pages application. AngularJS + TypeScript by Alexandre Vinet TypeScript has been around for a while but I refrained from looking into it for the longest time because, like you, no doubt, I believed that any language whose mission is to produce another language could only be a disaster. Luckily, options exist to add stronger types to JavaScript. And of course, keep your code under version control. Create Map. Web Development/Cloud Tutorials,How-to's and News. TypeScript 0. The book covers: How to get started. You will find resources and examples for JavaScript beginners as well as support for JavaScript experts. Typescript Tutorial for Angular 2019 | Introduction. Tutorial Guide to AutoCAD 2019 provides a step-by-step introduction to AutoCAD with commands presented in the context of each tutorial. Features of TypeScript. TestCafe allows you to write tests with TypeScript - a typed superset of JavaScript. 0 was released at Build 2014. The popular JavaScript framework Angular 2. Wallaby supports lots of technologies, and we have a collection of sample projects with configuration files for different tools, frameworks and languages such as Jasmine, Mocha, QUnit, Jest, Webpack, Browserify, ES6 and ES7 via Babel, TypeScript and CoffeeScript, React and Angular, node. You will learn TypeScript and its features like Types, ES6 Support, Classes, Modules, etc. In this tutorial, we are going to be looking at how you can use both the async and await keywords within your TypeScript application and subsequently improve the readibility and succinctness of your code. js, and TypeScript - part 1 - setup…. Now that we know the inspiration behind TypeScript and the various advantages it provides to build large scale applications, let us look into how to install and setup TypeScript in the next tutorial. 😉 In this article, we're going to finally explore generics, some complex types and declaration files. It is an open source language developed by Microsoft which statically compiles the code to JavaScript that can easily run in a browser or in Nodejs. Hoffentlich behandeln wir alle Basics etc. If you're on a different platform (or don't want to use Visual Studio), all you need is a text editor, a browser, and the TypeScript npm package to use TypeScript. Bill is like me in at least one way - he loves TypeScript and Angular 2. If you prefer learning concepts from the ground up, check out our step-by-step guide. An extension to Visual Studio 2017 and Visual Studio 2019 that runs TSLint on TypeScript files. It is done with the help of a method called Trans-Piled. In this tutorial, you’ll learn the basics of TypeScript with the help of practical examples. A typescript is a superset of JavaScript where it compiles down into plain JavaScript. JavaScript, as we know, does not support enums but TypeScript helps us access them; TypeScript enums save runtime and compile time with inline code in JavaScript, (which we will see later in this article) TypeScript enums also provide a certain flexibility that we previously had only in languages like Java. typings install dt~angular-protractor --global --save. TypeScript is better equipped to handle the server-side. In this tutorial, you are going to learn how to install angular 7 on your machine step-by-step from beginner level. Bundling and Minification are two distinct performance optimizations you can apply in a web app. You can see the source code of this tutorial on my GitHub repository, here : Angular2 web app source code on GitHub. TypeScript 1. It has been upgraded to Visual Studio 2017 and Visual Studio 2019. But some of us also love types. All the valid JavaScript code that you write is also valid TypeScript code. If you prefer learning concepts from the ground up, check out our step-by-step guide. Typescript is a superset of javascript and it adds. So now that we have completed all the prerequisites it’s time to start getting in to Angular. However, with TypeScript, you get to use static typing and the latest. We are also about to launch a free 22-part TypeScript course on Scrimba. This entry is part 6 of 12 in the TypeScript Express tutorial. Installing TypeScript # There are two main ways to get the TypeScript tools: Via npm (the Node. Today, you can learn everything online. Tutorial zine. We will also discuss how to add days to date in typescript, date format in typescript, typescript date now etc. In this tutorial, we will be doing a lot of set up for Protractor Typescript using Visual Studio Code. Using TypeScript brings you all the advantages of strongly typed languages: rich coding assistance, painless scalability, check-as-you-type code verification and much more. Run the following command, this will install typescript globally in your machine. Render props ( and ). It's available for public testing and you can try it out now: npm install -g [email protected]. What is Typescript? Who is the founder of TypeScript? What is the latest and stable version of TypeScript? Why should I use Typescript? How to Setup and Install Typescript? What are TypeScript Pros and. Learning React? Check out these best online React courses and tutorials recommended by the programming community. TypeScript is a superset of JavaScript language and helps to write JavaScript programs with compilation and using OOPS features. NET developer myself, using TypeScript works well with Visual Studio. npm install browser-sync gulp gulp-protractor gulp-typescript typescript --save-dev To use TypeScript features correctly, we will also need definitions for our library. However, TypeScript got its initial breakthrough as the core programming language in Angular 2. TypeScript can help you create maintainable and scalable web apps. However, with TypeScript, you get to use static typing and the latest. Announcing TypeScript 3. Hoffentlich behandeln wir alle Basics etc. There are many tutorials and examples available online which makes your learning easier. In this TypeScript tutorial I will be going over TypeScript Getters and Setters which are called TypeScript Accessor. Here is what you need to do step by step if you are using WebPack already. 5 RC Daniel Rosenwasser May 16, 2019 May 16, 2019 05/16/19. List of programming languages. TypeScript provides Date library to perform operation on Dates. The top 18 TypeScript tutorials - learn TypeScript for free. Before we start coding, we need to install the TypeScript on our local machine. Using TypeScript allows us to get the benefits of IntelliSense, as well as the ability to further reason about our code. In this tutorial, we are going to be looking at how you can use both the async and await keywords within your TypeScript application and subsequently improve the readibility and succinctness of your code. Nine and a half percent of the developers Stack Overflow surveyed are using TypeScript, making it the ninth most popular language, just ahead of. TypeScript was first made public in October 2012 (at version 0. Why is TypeScript getting so popular? Key development frameworks depend on it and it improves developer productivity in the ever-changing JavaScript world. Tutorial series: learning how to write a 3D soft engine from scratch in C#, TypeScript or JavaScript June 13, 2013 April 29, 2016 David Rousset 3D Software Engine , English , Technical article , Tutorial. Typescript is a superset of javascript and it adds. If you haven't already, be sure to check out part I and II for getting started with TS and knowing what's going on in this tutorial. To get started with typescript, here's an awesome tutorial TypeScript Tutorial for Beginners. Luckily, options exist to add stronger types to JavaScript. The result leverages the best of what AWS has to offer. Abstract: This tutorial will walk you through the creation of a React. Angular is a framework for building client applications in HTML, CSS, and either JavaScript or a language like TypeScript that can be compiled (more accurately, transpiled) to JavaScript. After completing these TypeScript course you can jump to the next level of your knowledge. io is the best platform to learn TypeScript with a large number of available TypeScript tutorials, both free and paid. It also greatly improves refactoring. Run the following command, this will install typescript globally in your machine. log(msg); } CodesJava Easy learning with example program codes. Typescript supports 3rd party vendor libraries, which do not use Typescript for library development, using DefinitelyTyped Repo. TypeScript also has a package which can be used in Node. To get TypeScript Accessor’s working we need to let the compiler know we want to export the code as ECMAScript 5 compliant. What is Typescript? Who is the founder of TypeScript? What is the latest and stable version of TypeScript? Why should I use Typescript? How to Setup and Install Typescript? What are TypeScript Pros and. This Babel preset was a year long collaboration, and their new focus is on improving ESLint integration. I discuss why you might want to do this, and I use Knockout for the purposes of demonstration. All of these courses will be the great coverage for learning typescript. Using TypeScript brings you all the advantages of strongly typed languages: rich coding assistance, painless scalability, check-as-you-type code verification and much more. We are going to cover 10 frequently asked TypeScript interview questions and answers in 2019. Before you start with angular2, learn typescript. This entry is part 6 of 12 in the TypeScript Express tutorial. TypeScript tutorial application provides faster learning of typescript guide. Make sure the TypeScript Language Service checkbox is selected. Software. You have also learned how to configure webpack with ts-loader to compile the TypeScript files and emit a final build. Currently, TypeScript is being developed under Anders Hejlsberg, the lead architect of C# and creator of Delphi and Turbo Pascal. Let’s get started by building a simple web application with TypeScript. Courses are submitted and voted on by developers, enabling you to find the best Angular courses and resources. Tutorial zine. January 7, 2019. js package manager) By installing TypeScript’s Visual Studio plugins. We’ll start with a basic Electron project and progressively build it into an enterprise-ready solution. Now that we know the inspiration behind TypeScript and the various advantages it provides to build large scale applications, let us look into how to install and setup TypeScript in the next tutorial. Danke für das Tutorial. Select: choose this option to use a custom typescript package instead of the one bundled with IntelliJ IDEA. Nine and a half percent of the developers Stack Overflow surveyed are using TypeScript, making it the ninth most popular language, just ahead of. Dylan will share with you what's been added recently to TypeScript and how these additions improve application accuracy and developer ergonomics. For me, the absolute gamechanger with Typescript is the IDE integration which gives you autocomplete for all class properties, object keys, function parameters, etc. The result leverages the best of what AWS has to offer. A developer provides a tutorial on how to work with the TypeScript language, specifically how to work with classes and interfaces, and extend interfaces. There is an easier way. This change is enormous because of the TypeScript group always include the necessary advanced features into all new releases. Starting from Basics to Advanced concepts in step by step fashion. Speed up your coding skills 🚀 How to connect your React app to a backend on the same origin. Top 10 TypeScript Books For Web Developers Frontend Resources Web Development By Alex Turner This post may contain affiliate links. To make the transition from Java to TypeScript a little bit easier, we've provided a quick TypeScript syntax guide for Java developers here. We have come up with the most crucial interview Typescript interview questions regarding TypeScript. In this article, I look at the steps required to get TypeScript up and running in the context of a Razor Pages application. Running the Angular 8 Login Tutorial Example Locally. Angular is a framework for building client applications in HTML, CSS, and either JavaScript or a language like TypeScript that can be compiled (more accurately, transpiled) to JavaScript. It includes both the TypeScript experience for Visual Studio and a standalone compiler that …Debug server-side script. The goal of this TypeScript syntax tutorial is not to describe every aspect of the language, but instead to demonstrate how concepts familiar to a Java developer manifest themselves in TypeScript. Quick start Get started with a simple TypeScript app. Getting Started Tutorial. Install TypeScript with this tutorial. In this article we are analyzing the top five JavaScript frameworks for 2019. TypeScript is a superset of JavaScript that contains features that make it easier to write and maintain than standard JavaScript. The point of this article is to show you the best and easiest configuration for TypeScript while developing for NodeJS/Express. Typescript type assertion 8. TypeScript 0. This will be beginner level tutorial where you’ll learn how to set an express app server with a couple of routes in TypeScript. New Surface Laptop 3. April 12, 2019 While I do appreciate the help for function names (nice job!), I think it would nice to have something that illustrates the idea that sets only allow distinct values in the example. Luckily, options exist to add stronger types to JavaScript. The State of React in 2019. Ability to use Interfaces. This functionality. json file which defines the TypeScript project settings such as the compiler options and the files that should be included. Angular is a framework for building client applications in HTML, CSS, and either JavaScript or a language like TypeScript that can be compiled (more accurately, transpiled) to JavaScript. Choose the path to the relevant package in the dialog that opens. To install TypeScript you need first Node. You should also be familiar with how models, views, and controllers work in CodeIgniter. Tutorial zine. TypeScript is a typed superset of JavaScript compiled to JavaScript. The TypeScript experience in Visual Studio is currently superior to other code editors. In Pro-ceedings of the 2019 ACM SIGPLAN SPLASH-E Symposium (SPLASH- documentation and tutorial system. We recommend that you use the TypeScript compiler only for type checking. Support for other editors will likely be rolling in in the near future. Why is TypeScript getting so popular? Key development frameworks depend on it and it improves developer productivity in the ever-changing JavaScript world. Typescript definition, a typewritten copy of a literary composition, document, or the like, especially as prepared for a printer. JavaScript, as we know, does not support enums but TypeScript helps us access them; TypeScript enums save runtime and compile time with inline code in JavaScript, (which we will see later in this article) TypeScript enums also provide a certain flexibility that we previously had only in languages like Java. This tutorial shows how to work with Arrays in Typescript with examples. Typescript is a superset of JavaScript. It offers classes, modules, and interfaces to help you build robust components. TypeScript is an open-source, object-oriented programing language, which is developed and maintained by Microsoft under the Apache 2 license. In this course, we will learn about TypeScript, the new, JavaScript inspired language by Microsoft. TypeScript in 5 minutes Let’s get started by building a simple web application with TypeScript. Choose the path to the relevant package in the dialog that opens. TypeScript is what C# developers wished for Javascript. Learning React? Check out these best online React courses and tutorials recommended by the programming community. Be the master of the concept , Difference between a coder and a developer. TypeScript gives us user-friendly errors during compile time. I'll use the hello world example of the express. NET Core app with client-side scripting done in TypeScript. Typescript Tutorial Example For Beginners. Read DZone's 2019 Machine. The language service supports the common set of typical editor operations like statement completions, signature help, code formatting and outlining, colorization, etc. As well as this, adopting TypeScript is easy as files can be incrementally upgraded without causing issues throughout the rest of your project. karma-typescript. Get remapped test coverage with karma-coverage and Istanbul. By the end of this tutorial, you will: Know how to create an app that shows up on the Desktop; Know how to create a dataservice that implements a simple REST API; Be introduced to Typescript programming. If you don't want to follow steps, just use bahmutov/add-typescript-to-cypress module. The TypeScript team are working hard to spread the love. We also discussed a test using. Today we will learn about typescript and this tutorial provides fundamentals of typescript and try to cover most of the topics such as typescript variables, functions, enum, class, access modifiers, interface, typecasting, arrow functions and many more for beginers to get started with angular. A developer provides a tutorial on how to work with the TypeScript language, specifically how to work with classes and interfaces, and extend interfaces. Here is what you need to do step by step if you are using WebPack already. 4 is out with the usual array of new features, of which a new --incremental flag can lead to faster project builds after the first such build. The TypeScript language specification has full details about the language. This is a version of Mads Kristensen's Web Analyzer for Visual Studio 2015. TypeScript is a typed superset of JavaScript compiled to JavaScript. The popular JavaScript framework Angular 2. Architecture Of Angular (2,4,5,6,7, …. Learning React? Check out these best online React courses and tutorials recommended by the programming community. All of these courses will be the great coverage for learning typescript. Learn TypeScript step by step with easy and practical examples. In this article, we will be building step by step an Angular 8 CRUD Web Application from scratch. This tutorial walks you through how to create and deploy a simple AWS CDK app, from initializing the project to deploying the resulting AWS CloudFormation template. January 7, 2019. x is a front end JavaScript framework that has gained huge traction and popularity in the development community. But you could also work with real classes so that the objects retrieved from the database will be actual instances of the class you have defined in typescript. A web developer gives a tutorial on how to work with the TypeScript language, specifically how to define classes and constructors, and initiate instances in TS. TypeScript supports arrays, similar to JavaScript. If you're interested in what types you can use in a TypeScript interface, check out my post about TypeScript types here. In this tutorial, you'll learn how to build a secure API using NestJS, a module-based architecture framework for Node. io end-to-end tests in TypeScript is a question that comes up again and again. Speed up your coding skills 🚀 How to connect your React app to a backend on the same origin. NestJs is a framework used to serve our server needs. In this article, we will be building step by step an Angular 8 CRUD Web Application from scratch. com is a resource for the JavaScript community. Choose the path to the relevant package in the dialog that opens. Subsequent builds are speeded up by relying upon information stored from the latest compilation to optimize the new build. So from Lab 6 the actual Angular starts. This is another tutorial that explains how to use the DHTMLX components with third-party JavaScript projects. TypeScript tutorial provides basic and advanced concepts of TypeScript. You will hit the ground running. In this TypeScript tutorial, we will discuss the TypeScript Date. 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: