Merge branch 'Simplified_component_declaration'

# Conflicts:
#	build/dc.min.js.map

Author: anton-github

build/dc.min.js

@@ -79,8 +79,7 @@ <h2>Simple example</h2>
 
             <div class="example mb-5">
                 <div class="collapsed" id="simple-collapsed" data-live-highlight="simple"
-                        data-dc-component-collapsed
-                        data-dc-collapsed-options='{"speed": 500, "ease": "linear"}'>
+                        data-dc-collapsed='{"speed": 500, "ease": "linear"}'>
                     <button class="collapsed__button" data-dc-collapsed-ref="button">
                         Toggle
                     </button>

build/dc.min.js.map

@@ -1,12 +1,13 @@
 import utils from './utils';
 
-const DC_ATTRIBUTE_COMPONENT = 'data-dc-component';
-
 const DC_NAMESPACE = 'data-dc';
-const DC_NAMESPACED_ATTRIBUTE_OPTIONS = 'options';
 const DC_NAMESPACED_ATTRIBUTE_REFERENCE = 'ref';
 const DC_NAMESPACED_ATTRIBUTE_ID = 'id';
 
+function getNamespacedAnchorAttribute(namespace) {
+    return `${DC_NAMESPACE}-${namespace}`
+}
+
 /**
  * @param {HTMLElement} root
  * @param {string} namespace
@@ -17,7 +18,7 @@ const DC_NAMESPACED_ATTRIBUTE_ID = 'id';
 function findElementsForInit(root, namespace, selector = null) {
     // by default we use namespace
     if (selector === null) {
-        selector = `[${DC_ATTRIBUTE_COMPONENT}-${namespace}]`;
+        selector = `[${getNamespacedAnchorAttribute(namespace)}]`;
     }
 
     let elements = [];
@@ -63,7 +64,7 @@ function scopedQuerySelectorAll(element, selector, namespace, id) {
  * @return {Object}
  */
 function getElementOptions(element, namespace) {
-    return getElementAttributeAsObject(element, getNamespacedAttributeName(DC_NAMESPACED_ATTRIBUTE_OPTIONS, namespace)) || {};
+    return getElementAttributeAsObject(element, getNamespacedAnchorAttribute(namespace));
 }
 
 /**
@@ -72,7 +73,7 @@ function getElementOptions(element, namespace) {
  * @return {?Object}
  */
 function getElementAttributeAsObject(element, attribute) {
-    let result = null;
+    let result = {};
     const attributeValue = element.getAttribute(attribute);
     if (attributeValue) {
         try {