This is easy to do if you’re using module loader like SystemJS. For example, I’m looking at the enableDebugTools function:ĭebugging in a browser console Accessing modulesĭuring debugging you may need to get access to a particular module and its exports in the console. If I need to debug some functionality in JS, I note what module this functionality is located in, open this module in a browser, find the piece of code and put a breakpoint there. Whenever I see something unclear in JS files I use TS sources in the source repository. At the moment, both SystemJS and Angular-cli is configured to load non-minified files. I don’t find reading compiled JS sources hard, but you have to make sure that you’re loading non-minified version into the browser. The main reason is that debugging TS in a browser is far from optimal experience. When setting breakpoints in a browser and following call stack I use JavaScript files, not TypeScript. I explore the sources in IDE and use debugger in a browser to reconstruct program execution flow with the help of call stack. If you are not familiar with SystemJS, you can read here to understand why it’s used. The files placed at this location will be loaded into a browser either through module loader like SystemJS or as part of a bundler like Webpack. Angular provides minified files and map files as well. For example, core module is located at node_modules/core/bundles/. $ git checkout tags/4.0.1Īngular’s build process packages sources in UMD modules located at node_modules//bundles/.umd.js. For example, the following code clones sources into ng folder and checks out version 4.0.1: $ mkdir ng & cd $_ $ git clone https: ///angular/angular.git. If you want to explore TS sources comfortably with the IDE help, you will have to clone github repository to your machine and check out the required version using corresponding tag. ![]() But they are concatenated and hence not readable. TS sources are still included into the bundled JavaScript mapping files in the sourcesContent field. I’m happy to answer any questions you may have. If you’re curious to learn about data grids or looking for the ultimate Angular data grid solution, give it a try with the guide “ Get started with Angular grid in 5 minutes ”. I work as a developer advocate at ag-Grid. The content described in the article is based on the current major version 4.x.x. The second part of the article explores debugging API provided by the framework that you can access in a browser console - mostly ng.probe functionality.īefore we begin, please note that all current debugging API is marked as experimental and may change in the future versions of Angular. The first part of the article shows the approach I use when debugging source code. Unfortunately, at the moment the official documentation on debugging tools and practices in Angular is lacking so this article is aimed to provide you with the knowledge to become Angular debugging ninja □. So it’s important to know how to leverage all the available tools. All developers when start working on an existing project debug a lot. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. “ Debugging is twice as hard as writing the code in the first place. You may run gulp watch in a stand-alone terminal to have the output automatically updated when you save changes.Read an updated version of this article on INDEPTH DEV. Then, run the minification task to minify vendor files gulp minify. Productionįor a production setup, uncomment the lines in main.ts to put Angular in production mode. You can have the tests auto-run when tests or ts files change by running the gulp watchtests command. This generates the JavaScript files, then runs the tests against them. To run the tests, use the command gulp test. ![]() Tests are in the test directory, with one already there as an example. If you add more packages, you will need to update the file to include them in the bundle during the build process. To generate the output directory dist/ run the command gulp. You may also need to run gem install scss-lint for the linter to work. Uses Gulp to automate tasks and systemjs-builder to package files.Ĭlone the repo to where you want to use it, then install the npm packages with npm i. Includes examples following the official style guide to create components, templates (inline and separate), and routes (using the latest router). A simple base project for Angular 2 apps, using Gulp to automate tasks and SystemJS to bundle the app.
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