diff --git a/.npmignore b/.npmignore
index f900b6d..f721ab5 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,6 +1,3 @@
 .tscache
 node_modules
-dist
-!/dist
-!/dist.babel
 tscommand
diff --git a/README.md b/README.md
index 6deb4be..7bce0ab 100644
--- a/README.md
+++ b/README.md
@@ -125,6 +125,11 @@ Array of paths to .d.ts files that must be included in program. Useful with `rew
 
 Use this setting to disable type checking.
 
+### ignoreDiagnostics *(number[]) (default=[])*
+
+You can squelch certain TypeScript errors by specifying an array of [diagnostic codes](https://github.com/Microsoft/TypeScript/blob/master/src/compiler/diagnosticMessages.json) to ignore.
+For example, you can transpile [stage 1 properties](https://github.com/jeffmo/es-class-fields-and-static-properties) from `*.js` using `"ignoreDiagnostics": [8014]`.
+
 ### forkChecker *(boolean) (default=false)*
 
 Do type checking in a separate process, so webpack doesn't need to wait. **Significantly** improves development workflow with tools like [react-hot-loader](https://github.com/gaearon/react-hot-loader).
@@ -169,7 +174,7 @@ Directory when cache is stored.
 
 Invoke glob resolver using 'filesGlob' and 'exclude' sections of `tsconfig`.
 
-### skipDeclarationFilesCheck *(string) (default=fase)*
+### skipDeclarationFilesCheck *(string) (default=false)*
 
 Skip declaration files typechecking. Use this only if you understand consequences.
 
diff --git a/package.json b/package.json
index 4525f28..fd74a53 100644
--- a/package.json
+++ b/package.json
@@ -4,14 +4,17 @@
   "description": "Awesome TS loader for webpack",
   "main": "dist.babel/entry.js",
   "scripts": {
-    "prepublish": "npm run ts-build && npm run babel-build && grunt",
-    "ts": "./node_modules/.bin/tsc --project src --watch  --pretty --diagnostics",
-    "ts-build": "./node_modules/.bin/tsc --project src --pretty",
-    "babel": "babel dist --presets es2015 --out-dir dist.babel --watch",
-    "babel-build": "babel dist --presets es2015 --out-dir dist.babel",
+    "prepublish": "npm run test && grunt",
+    "pretest": "npm run build",
     "test": "mocha dist.babel/test",
-    "build": "npm run grunt && npm run babel-compile",
-    "lint": "./node_modules/.bin/tslint src/*.ts"
+    "watch": "npm run watch:ts && npm run watch:babel",
+    "watch:ts": "npm run build:ts -- --watch --diagnostics",
+    "watch:babel": "npm run build:babel -- --watch",
+    "prebuild": "npm run lint",
+    "build": "npm run build:ts && npm run build:babel",
+    "build:ts": "tsc -p src --pretty",
+    "build:babel": "babel dist -d dist.babel",
+    "lint": "tslint src/*.ts"
   },
   "author": "Stanislav Panferov <fnight.m@gmail.com> (http://panferov.me/)",
   "repository": {
@@ -59,7 +62,6 @@
     "grunt-contrib-copy": "^0.7.0",
     "grunt-conventional-changelog": "^1.2.1",
     "grunt-shell": "^1.1.2",
-    "grunt-ts": "^3.0.0",
     "load-grunt-tasks": "^0.6.0",
     "mkdirp": "^0.5.1",
     "mocha": "^2.3.4",
diff --git a/src/helpers.ts b/src/helpers.ts
index 9be6bf2..5bdbee1 100644
--- a/src/helpers.ts
+++ b/src/helpers.ts
@@ -58,20 +58,18 @@ export function codegenErrorReport(errors) {
         .join('\n');
 }
 
-export function formatErrors(instanceName: string, errors: ts.Diagnostic[]) {
-    return errors.map(function (diagnostic) {
-        let lineChar;
-        if (diagnostic.file) {
-            lineChar = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
-        }
-        return (
-            `[${ instanceName }] ` + (diagnostic.file ? diagnostic.file.fileName : '')
-            + (lineChar ? formatLineChar(lineChar) + ' ' : '') + "\n"
-            + (typeof diagnostic.messageText == "string" ?
-                diagnostic.messageText :
-                formatMessageChain(<ts.DiagnosticMessageChain>diagnostic.messageText))
-        );
-    });
+export function formatError(diagnostic) {
+    let lineChar;
+    if (diagnostic.file) {
+        lineChar = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
+    }
+    return (
+        (diagnostic.file ? diagnostic.file.fileName : '')
+        + (lineChar ? formatLineChar(lineChar) + ' ' : '') + "\n"
+        + (typeof diagnostic.messageText == "string" ?
+            diagnostic.messageText :
+            formatMessageChain(<ts.DiagnosticMessageChain>diagnostic.messageText))
+    );
 }
 
 export function formatMessageChain(chain: ts.DiagnosticMessageChain) {
diff --git a/src/host.ts b/src/host.ts
index 9f012c6..d22ce0f 100644
--- a/src/host.ts
+++ b/src/host.ts
@@ -41,6 +41,7 @@ export interface ICompilerOptions extends ts.CompilerOptions {
     exclude?: string[];
     externals?: any;
     doTypeCheck?: boolean;
+    ignoreDiagnostics?: number[];
     forkChecker?: boolean;
     forkCheckerSilent?: boolean;
     useBabel?: boolean;
diff --git a/src/instance.ts b/src/instance.ts
index 187d4cf..6e92900 100644
--- a/src/instance.ts
+++ b/src/instance.ts
@@ -3,7 +3,7 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as _ from 'lodash';
 import * as tsconfig from 'tsconfig';
-import { loadLib, formatErrors } from './helpers';
+import { loadLib, formatError } from './helpers';
 import { ICompilerInfo } from './host';
 import { createResolver } from './deps';
 import { createChecker } from './checker';
@@ -358,16 +358,19 @@ function setupAfterCompile(compiler, instanceName, forkChecker = false) {
             }
 
             let diagnostics = state.ts.getPreEmitDiagnostics(state.program);
-            let emitError = (err) => {
+            let emitError = (msg) => {
                 if (compilation.bail) {
-                    console.error('Error in bail mode:', err);
+                    console.error('Error in bail mode:', msg);
                     process.exit(1);
                 }
-                compilation.errors.push(new Error(err));
+                compilation.errors.push(new Error(msg));
             };
 
-            let errors = formatErrors(instanceName, diagnostics);
-            errors.forEach(emitError);
+            let {options: {ignoreDiagnostics}} = instance;
+            diagnostics
+                .filter(err => !ignoreDiagnostics || ignoreDiagnostics.indexOf(err.code) == -1)
+                .map(err => `[${ instanceName }] ` + formatError(err))
+                .forEach(emitError);
 
             instance.initedPlugins.forEach(plugin => {
                 plugin.processProgram(state.program);
diff --git a/src/test/index.ts b/src/test/index.ts
index 3496bd6..2acfbaf 100644
--- a/src/test/index.ts
+++ b/src/test/index.ts
@@ -28,6 +28,17 @@ describe('main test', function() {
         expect(stats.compilation.errors.length).eq(1);
     });
 
+    it('should ignore diagnostics', async function() {
+        let config = {
+            entry: fixturePath(['errors', 'with-type-errors.ts'])
+        };
+
+        let loaderQuery = { ignoreDiagnostics: [2345] };
+
+        let stats = await cleanAndCompile(createConfig(config, { loaderQuery }));
+        expect(stats.compilation.errors.length).eq(0);
+    });
+
     it('should load tsx files and use tsconfig', async function() {
         let tsconfig = fixturePath(['tsx', 'tsconfig.json']);
         let config = {
diff --git a/src/tsconfig.json b/src/tsconfig.json
index c325696..6ad5102 100644
--- a/src/tsconfig.json
+++ b/src/tsconfig.json
@@ -2,13 +2,11 @@
     "compilerOptions": {
         "target": "es6",
         "outDir": "../dist",
-        "declaration": false,
         "moduleResolution": "node",
         "skipDefaultLibCheck": true,
         "allowSyntheticDefaultImports": true,
         "noImplicitAny": false,
         "removeComments": true,
-        "noLib": false,
         "preserveConstEnums": true,
         "suppressImplicitAnyIndexErrors": true
     },