diff --git a/doc/tasks.md b/doc/tasks.md
index 4618d83bf..3984770e0 100644
--- a/doc/tasks.md
+++ b/doc/tasks.md
@@ -22,6 +22,7 @@ parameters:
         gulp: ~
         jsonlint: ~
         make: ~
+        npm_script: ~
         phing: ~
         php7cc: ~
         phpcpd: ~
@@ -58,6 +59,7 @@ Every task has it's own default configuration. It is possible to overwrite the p
 - [Gulp](tasks/gulp.md)
 - [JsonLint](tasks/jsonlint.md)
 - [Make](tasks/make.md)
+- [NPM script](tasks/npm_script.md)
 - [Phing](tasks/phing.md)
 - [Php7cc](tasks/php7cc.md) 
 - [PhpCpd](tasks/phpcpd.md)
diff --git a/doc/tasks/npm_script.md b/doc/tasks/npm_script.md
new file mode 100644
index 000000000..44ecbfa11
--- /dev/null
+++ b/doc/tasks/npm_script.md
@@ -0,0 +1,41 @@
+# NPM script
+
+The NPM script task will run your configured npm script.
+It lives under the `npm_script` namespace and has following configurable parameters:
+
+```yaml
+# grumphp.yml
+parameters:
+    tasks:
+        npm_script:
+            script: ~
+            triggered_by: [js, jsx, coffee, ts, less, sass, scss]
+            working_directory: "./"
+```
+
+**script**
+
+*Default: null*
+
+This option specifies which NPM script you want to run.
+This option is set to null by default.
+This means that grumphp will stop immediately.
+Note that this script should be used to verify things.
+It is also possible to alter code during commit,
+but this is surely NOT recommended!
+
+
+**triggered_by**
+
+*Default: [js, jsx, coffee, ts, less, sass, scss]*
+
+This option will specify which file extensions will trigger the NPM script.
+By default NPM script will be triggered by altering any file.
+You can overwrite this option to whatever file you want to use!
+
+
+**working_directory**
+
+*Default: "./"*
+
+This option specifies in which directory the NPM script should be run.
diff --git a/resources/config/tasks.yml b/resources/config/tasks.yml
index 96f401618..217ba0ac8 100644
--- a/resources/config/tasks.yml
+++ b/resources/config/tasks.yml
@@ -121,6 +121,15 @@ services:
         tags:
             - {name: grumphp.task, config: make}
 
+    task.npm.script:
+        class: GrumPHP\Task\NpmScript
+        arguments:
+            - '@config'
+            - '@process_builder'
+            - '@formatter.raw_process'
+        tags:
+            - {name: grumphp.task, config: npm_script}
+
     task.phing:
         class: GrumPHP\Task\Phing
         arguments:
diff --git a/spec/GrumPHP/Task/NpmScriptSpec.php b/spec/GrumPHP/Task/NpmScriptSpec.php
new file mode 100644
index 000000000..0ef795e62
--- /dev/null
+++ b/spec/GrumPHP/Task/NpmScriptSpec.php
@@ -0,0 +1,111 @@
+<?php
+
+namespace spec\GrumPHP\Task;
+
+use GrumPHP\Collection\FilesCollection;
+use GrumPHP\Collection\ProcessArgumentsCollection;
+use GrumPHP\Configuration\GrumPHP;
+use GrumPHP\Formatter\ProcessFormatterInterface;
+use GrumPHP\Process\ProcessBuilder;
+use GrumPHP\Runner\TaskResult;
+use GrumPHP\Task\Context\ContextInterface;
+use GrumPHP\Task\Context\GitPreCommitContext;
+use GrumPHP\Task\Context\RunContext;
+use GrumPHP\Task\NpmScript;
+use PhpSpec\ObjectBehavior;
+use Prophecy\Argument;
+use Symfony\Component\Finder\SplFileInfo;
+use Symfony\Component\Process\Process;
+
+/**
+ * @mixin NpmScript
+ */
+class NpmScriptSpec extends ObjectBehavior
+{
+    function let(GrumPHP $grumPHP, ProcessBuilder $processBuilder, ProcessFormatterInterface $formatter)
+    {
+        $grumPHP->getTaskConfiguration('npm_script')->willReturn(array('script' => 'test', 'working_directory' => './'));
+        $this->beConstructedWith($grumPHP, $processBuilder, $formatter);
+    }
+
+    function it_is_initializable()
+    {
+        $this->shouldHaveType('GrumPHP\Task\NpmScript');
+    }
+
+    function it_should_have_a_name()
+    {
+        $this->getName()->shouldBe('npm_script');
+    }
+
+    function it_should_have_configurable_options()
+    {
+        $options = $this->getConfigurableOptions();
+        $options->shouldBeAnInstanceOf('Symfony\Component\OptionsResolver\OptionsResolver');
+        $options->getDefinedOptions()->shouldContain('script');
+        $options->getDefinedOptions()->shouldContain('triggered_by');
+        $options->getDefinedOptions()->shouldContain('working_directory');
+    }
+
+    function it_should_run_in_git_pre_commit_context(GitPreCommitContext $context)
+    {
+        $this->canRunInContext($context)->shouldReturn(true);
+    }
+
+    function it_should_run_in_run_context(RunContext $context)
+    {
+        $this->canRunInContext($context)->shouldReturn(true);
+    }
+
+    function it_does_not_do_anything_if_there_are_no_files(ProcessBuilder $processBuilder, ContextInterface $context)
+    {
+        $processBuilder->createArgumentsForCommand('npm')->shouldNotBeCalled();
+        $processBuilder->buildProcess()->shouldNotBeCalled();
+        $context->getFiles()->willReturn(new FilesCollection());
+
+        $result = $this->run($context);
+        $result->shouldBeAnInstanceOf('GrumPHP\Runner\TaskResultInterface');
+        $result->getResultCode()->shouldBe(TaskResult::SKIPPED);
+    }
+
+    function it_runs_the_suite(ProcessBuilder $processBuilder, Process $process, ContextInterface $context)
+    {
+        $arguments = new ProcessArgumentsCollection();
+        $processBuilder->createArgumentsForCommand('npm')->willReturn($arguments);
+        $processBuilder->buildProcess($arguments)->willReturn($process);
+
+        $process->run()->shouldBeCalled();
+        $process->setWorkingDirectory(getcwd())->shouldBeCalled();
+        $process->isSuccessful()->willReturn(true);
+
+        $context->getFiles()->willReturn(new FilesCollection(array(
+            new SplFileInfo('test.js', '.', 'test.js')
+        )));
+
+        $result = $this->run($context);
+        $result->shouldBeAnInstanceOf('GrumPHP\Runner\TaskResultInterface');
+        $result->isPassed()->shouldBe(true);
+    }
+
+    function it_throws_exception_if_the_process_fails(
+        ProcessBuilder $processBuilder,
+        Process $process,
+        ContextInterface $context
+    ) {
+        $arguments = new ProcessArgumentsCollection();
+        $processBuilder->createArgumentsForCommand('npm')->willReturn($arguments);
+        $processBuilder->buildProcess($arguments)->willReturn($process);
+
+        $process->run()->shouldBeCalled();
+        $process->setWorkingDirectory(getcwd())->shouldBeCalled();
+        $process->isSuccessful()->willReturn(false);
+
+        $context->getFiles()->willReturn(new FilesCollection(array(
+            new SplFileInfo('test.js', '.', 'test.js')
+        )));
+
+        $result = $this->run($context);
+        $result->shouldBeAnInstanceOf('GrumPHP\Runner\TaskResultInterface');
+        $result->isPassed()->shouldBe(false);
+    }
+}
diff --git a/src/GrumPHP/Task/NpmScript.php b/src/GrumPHP/Task/NpmScript.php
new file mode 100644
index 000000000..babf22365
--- /dev/null
+++ b/src/GrumPHP/Task/NpmScript.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace GrumPHP\Task;
+
+use GrumPHP\Runner\TaskResult;
+use GrumPHP\Task\Context\ContextInterface;
+use GrumPHP\Task\Context\GitPreCommitContext;
+use GrumPHP\Task\Context\RunContext;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * NpmScript task
+ */
+class NpmScript extends AbstractExternalTask
+{
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return 'npm_script';
+    }
+
+    /**
+     * @return OptionsResolver
+     */
+    public function getConfigurableOptions()
+    {
+        $resolver = new OptionsResolver();
+        $resolver->setDefaults(array(
+            'script' => null,
+            'triggered_by' => array('js', 'jsx', 'coffee', 'ts', 'less', 'sass', 'scss'),
+            'working_directory' => './',
+        ));
+
+        $resolver->addAllowedTypes('script', array('string'));
+        $resolver->addAllowedTypes('triggered_by', array('array'));
+        $resolver->addAllowedTypes('working_directory', array('string'));
+
+        return $resolver;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function canRunInContext(ContextInterface $context)
+    {
+        return ($context instanceof GitPreCommitContext || $context instanceof RunContext);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function run(ContextInterface $context)
+    {
+        $config = $this->getConfiguration();
+        $files = $context->getFiles()->extensions($config['triggered_by']);
+        if (0 === count($files)) {
+            return TaskResult::createSkipped($this, $context);
+        }
+
+        $arguments = $this->processBuilder->createArgumentsForCommand('npm');
+        $arguments->addRequiredArgument('%s', $config['script']);
+
+        $process = $this->processBuilder->buildProcess($arguments);
+        $process->setWorkingDirectory(realpath($config['working_directory']));
+        $process->run();
+
+        if (!$process->isSuccessful()) {
+            return TaskResult::createFailed($this, $context, $this->formatter->format($process));
+        }
+
+        return TaskResult::createPassed($this, $context);
+    }
+}