Enable typescript source map

gulpfile.ts

@@ -8,6 +8,7 @@ import * as Path from 'path';
 import * as gulp from 'gulp';
 import * as gutil from 'gulp-util';
 import * as ts from 'gulp-typescript';
+const sourcemaps = require('gulp-sourcemaps');
 import tslint from 'gulp-tslint';
 import cssnano = require('gulp-cssnano');
 import * as uglifyComposer from 'gulp-uglify/composer';
@@ -60,7 +61,9 @@ gulp.task('build:ts', () => {
 
 	return tsProject
 		.src()
+		.pipe(sourcemaps.init())
 		.pipe(tsProject())
+		.pipe(sourcemaps.write('.', { includeContent: false, sourceRoot: '../built' }))
 		.pipe(gulp.dest('./built/'));
 });
 

package.json

@@ -121,6 +121,7 @@
 		"gulp-pug": "3.3.0",
 		"gulp-rename": "1.2.2",
 		"gulp-replace": "0.6.1",
+		"gulp-sourcemaps": "^2.6.4",
 		"gulp-stylus": "2.7.0",
 		"gulp-tslint": "8.1.3",
 		"gulp-typescript": "3.2.4",

tsconfig.json

@@ -8,7 +8,7 @@
     "noUnusedLocals": true,
     "noFallthroughCasesInSwitch": true,
     "declaration": false,
-    "sourceMap": false,
+    "sourceMap": true,
     "target": "es2017",
     "module": "commonjs",
     "removeComments": false,