implemented a lite version of the bem-cn

.gitignore

@@ -1,3 +1,4 @@
 .DS_Store
 .idea
 *.iml
+node_modules

index.js

@@ -0,0 +1,32 @@
+"use strict";
+
+var bemClassName = require('bem-cn').default;
+
+module.exports = function (blockName) {
+  var b = bemClassName(blockName);
+
+  function element(elementName, modifiers, mixin) {
+    // normalize arguments
+    if (typeof elementName === 'string') {
+      // going to create an element
+      if (typeof modifiers === 'string') {
+        mixin = modifiers;
+        modifiers = null;
+      }
+    } else {
+      // going to create a block
+      mixin = modifiers;
+      modifiers = null;
+    }
+
+    var result = b(elementName, modifiers);
+
+    return (mixin ? result.mix(mixin) : result).toString();
+  }
+
+  element.builder = function () {
+    return b;
+  };
+
+  return element;
+};

package.json

@@ -4,8 +4,28 @@
   "description": "Lite version of the friendly BEM-style class name generator, which is great for React",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "mocha tests/*-spec.js"
   },
   "author": "Vladimir Kuznetsov <mistakster@gmail.com>",
-  "license": "MIT"
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mistakster/bem-cn-lite.git"
+  },
+  "keywords": [
+    "BEM",
+    "React",
+    "class",
+    "classname",
+    "block",
+    "element",
+    "modifier"
+  ],
+  "dependencies": {
+    "bem-cn": "^2.0.0"
+  },
+  "devDependencies": {
+    "mocha": "^2.5.3",
+    "should": "^9.0.2"
+  }
 }

tests/block-spec.js

@@ -0,0 +1,39 @@
+"use strict";
+
+require('should');
+
+var generator = require('../index');
+
+var b = generator('block');
+
+describe('module', function () {
+  it('should generate block', function () {
+    var block = b();
+
+    block.should.equal('block');
+  });
+
+  it('should generate block with modifier', function () {
+    var block = b({modifier: true});
+
+    block.should.equal('block block_modifier');
+  });
+
+  it('should generate block with modifier and value', function () {
+    var block = b({modifier: 'value'});
+
+    block.should.equal('block block_modifier_value');
+  });
+
+  it('should generate block with mixin', function () {
+    var block = b(null, 'mixin');
+
+    block.should.equal('block mixin');
+  });
+
+  it('should generate block with modifier and mixin', function () {
+    var block = b({modifier: 'value'}, 'mixin');
+
+    block.should.equal('block block_modifier_value mixin');
+  });
+});

tests/element-spec.js

@@ -0,0 +1,39 @@
+"use strict";
+
+require('should');
+
+var generator = require('../index');
+
+var b = generator('block');
+
+describe('module', function () {
+  it('should generate element', function () {
+    var element = b('element');
+
+    element.should.equal('block__element');
+  });
+
+  it('should generate element with modifier', function () {
+    var element = b('element', {modifier: true});
+
+    element.should.equal('block__element block__element_modifier');
+  });
+
+  it('should generate element with modifier and value', function () {
+    var element = b('element', {modifier: 'value'});
+
+    element.should.equal('block__element block__element_modifier_value');
+  });
+
+  it('should generate element with mixin', function () {
+    var element = b('element', 'mixin');
+
+    element.should.equal('block__element mixin');
+  });
+
+  it('should generate element with modifier and mixin', function () {
+    var element = b('element', {modifier: 'value'}, 'mixin');
+
+    element.should.equal('block__element block__element_modifier_value mixin');
+  });
+});