Angular 2 and AOT (ahead of time) compilation
Today I managed to run AOT compilation in existing Angular 2 application.
This is a note to remember what I had to do to make it work:
- Follow this example: https://medium.com/@laco0416/aot-compilation-with-webpack-359ac9f4916f#.a1v35vlyl
- Downgrade Typescript to 2.0.10.
- Downgrade Webpack to 2.1.0-beta.28.
- Change all "template: require(path)" to "templateUrl: path". Require function is not available in AOT compilation process.
- Had to add angular2-typescript-loader to handle ts files in webpack (loaders: isProd ? '@ngtools/webpack' : ["awesome-typescript-loader", 'angular2-template-loader']). It handles templateUrl in components.
Newest versions of libraries (ts 2.2 and webpack 2.2.0-rc.3) had documented issues with whole mechanism, so I had some fun searching for solutions.
Performance before enabling AOT compilation:
And after
Scripting took 3 seconds less and it is more than visible. Difference is huge. Scripts are now 600KB bigger, but they load once, so it is not a huge problem. AOT compilation is nice feature of Angular 2.
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ReplyDeleteThe article provides a practical look at enabling AOT compilation in an existing Angular 2 application. The step-by-step notes, including changes to TypeScript, Webpack, templates, and loaders, make it useful for developers working through build and compilation challenges in an Angular project.
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The discussion also shows how changes in library versions can affect an existing development setup and require careful troubleshooting. Working with TypeScript alongside Angular is an important part of modern frontend development, and a TypeScript Course can help developers build stronger skills for maintaining and extending typed JavaScript applications.
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