Watches styles, scripts, tests, the main HTML for changes.
If there's a change in:
paths.app.stylesthe styles task is executed.paths.app.scriptsthe lint:scripts, test:run tasks are executed. If the change is a new or removed or renamed file, the inject task is executed additionally.paths.tests, the lint:tests and test:run task is run.paths.app.mainHtmlthe inject task is executed.paths.app.assetsthe assets:temp task is executed.
Used internally by dev.