How to use the @microsoft/web-library-build.typescript function in @microsoft/web-library-build

this.on('all', startRun);
  });
});

build.task('w', customWatch);

build.task('serve', serial(
  rushBuild,
  build.serve,
  customWatch
));

// Shortcuts for individual subtasks.
build.task('webpack', build.webpack);
build.task('tslint', build.tslint);
build.task('ts', build.typescript);

// initialize tasks.
build.initialize(gulp);

[path.join(distFolder, 'sass')]: [
      'node_modules/office-ui-fabric-core/dist/sass/**/*.*'
    ],
    [path.join(distFolder, 'css')]: [
      'node_modules/office-ui-fabric-core/dist/css/**/*.*'
    ]
  }
});

// Short aliases for subtasks.
build.task('webpack', build.webpack);
build.task('tslint', build.tslint);
build.task('ts', build.typescript);
build.task('sass', build.serial(build.preCopy, build.sass));
build.task('karma', build.karma);
build.task('test', serial(build.sass, build.typescript, build.karma));
// build.task('visualtest', serial(build.sass, build.typescript, build.webpack, visualTestClean, visualTest));

// initialize tasks.
build.initialize(gulp);

let path = require('path');
let pkg = require('./package.json');
let isProduction = process.argv.indexOf('--production') >= 0;
let isNuke = process.argv.indexOf('nuke') >= 0;

// Configur custom lint rules.
let rules = Object.assign(
  {},
  require('./node_modules/@microsoft/gulp-core-build-typescript/lib/defaultTslint.json').rules,
  require('../../tslint.json').rules,
  require('./tslint.json').rules
);
build.tslint.setConfig({ lintConfig: { rules } });

// Configure TypeScript 2.0.
build.typescript.setConfig({ typescript: require('typescript') });

// Disable karma unit tests.
build.karma.isEnabled = () => false;

let packageFolder = buildConfig.packageFolder || '';
let distFolder = buildConfig.distFolder;

build.postCopy.setConfig({
  copyTo: {
    [distFolder]: [
      'src/**/*.png',
      'node_modules/react/dist/react.js',
      'node_modules/react-dom/dist/react-dom.js'
    ]
  }
});

'use strict';

let build = require('@microsoft/web-library-build');
let gulp = require('gulp');

// Short aliases for subtasks.
build.task('webpack', build.webpack);
build.task('sass', build.sass);
build.task('karma', build.karma);
build.task('ts', build.typescript);
build.task('tslist', build.tslint);

// initialize tasks.
build.initialize(gulp);

// Always fail on test failures.
build.karma.setConfig({
  failBuildOnErrors: true
});

// Use css modules.
build.sass.setConfig({
  useCSSModules: true,
  moduleExportName: ''
});

'node_modules/office-ui-fabric-core/dist/css/**/*.*'
    ]
  }
});

// Produce AMD bits in lib-amd on production builds.
if (isProduction || isNuke) {
  build.setConfig({
    libAMDFolder: path.join(packageFolder, 'lib-amd')
  });
}

// Short aliases for subtasks.
build.task('webpack', build.webpack);
build.task('tslint', build.tslint);
build.task('ts', build.typescript);
build.task('sass', build.sass);

// initialize tasks.
build.initialize(gulp);

build.preCopy.setConfig({
  shouldFlatten: false,
  copyTo: {
    [path.join(distFolder, 'sass')]: [
      'node_modules/office-ui-fabric-core/dist/sass/**/*.*'
    ],
    [path.join(distFolder, 'css')]: [
      'node_modules/office-ui-fabric-core/dist/css/**/*.*'
    ]
  }
});

// Short aliases for subtasks.
build.task('webpack', build.webpack);
build.task('tslint', build.tslint);
build.task('ts', build.typescript);
build.task('sass', build.serial(build.preCopy, build.sass));
build.task('karma', build.karma);
build.task('test', serial(build.sass, build.typescript, build.karma));
// build.task('visualtest', serial(build.sass, build.typescript, build.webpack, visualTestClean, visualTest));

// initialize tasks.
build.initialize(gulp);