Question 1

How to set up incremental compilation with gulp-typescript?

Accepted Answer

Create a project outside tasks using ts.createProject(), then use tsProject() in a task with gulp.watch. Ensure gulp 4 for proper error handling in watch mode to avoid crashes.

Question 2

gulp-typescript vs tsc standalone for gulp builds?

Accepted Answer

gulp-typescript offers better gulp integration with streams and incremental builds, while tsc is simpler but lacks gulp-specific features like separate output streams and custom transformers.

Question 3

Why are my source maps not working with gulp-typescript?

Accepted Answer

You must use gulp-sourcemaps since sourceMap options are unsupported. Configure sourceRoot carefully based on outDir and gulp.dest, as detailed in the README's source maps section.

Question 4

Can I use gulp-typescript with TypeScript nightly or forks?

Accepted Answer

Yes, install typescript@next or a fork and pass it via the typescript option in createProject(). This flexibility allows testing new TypeScript versions without plugin updates.

Question 5

How to handle errors in gulp-typescript with gulp 3?

Accepted Answer

Attach an error handler with .on('error', ...) to prevent process crashes on compilation errors, as gulp 3 doesn't automatically handle this like gulp 4 does in watch mode.

Question 6

gulp-typescript or ts-loader for Webpack projects?

Accepted Answer

Use ts-loader for Webpack due to direct integration; gulp-typescript is only ideal if you're committed to gulp for builds, as it doesn't work with Webpack's module system.

gulp-typescript

What is gulp-typescript?

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