feat(component): attribute get/set/remove methods

This adds getter and setter and remover methods for attributes on
components.

src/js/component.js

@@ -985,6 +985,42 @@ class Component {
     return this;
   }
 
+  /**
+   * Get the value of an attribute on the component's element
+   *
+   * @param {String} attribute Attribute to get
+   * @return {String}
+   * @method getAttribute
+   */
+  getAttribute(attribute) {
+    return Dom.getAttribute(this.el_, attribute);
+  }
+
+  /**
+   * Set the value of an attribute on the component's element
+   *
+   * @param {String} attribute Attribute to set
+   * @param {String} value Value to set the attribute to
+   * @return {Component}
+   * @method setAttribute
+   */
+  setAttribute(attribute, value) {
+    Dom.setAttribute(this.el_, attribute, value);
+    return this;
+  }
+
+  /**
+   * Remove an attribute from the component's element
+   *
+   * @param {String} attribute Attribute to remove
+   * @return {Component}
+   * @method removeAttribute
+   */
+  removeAttribute(attribute) {
+    Dom.removeAttribute(this.el_, attribute);
+    return this;
+  }
+
   /**
    * Set or get the width of the component (CSS values)
    * Setting the video tag dimension values only works with values in pixels.

src/js/utils/dom.js

@@ -404,6 +404,41 @@ export function getElAttributes(tag) {
   return obj;
 }
 
+/**
+ * Get the value of an element's attribute
+ *
+ * @param {Element} el
+ * @param {String} attribute Attribute to get
+ * @return {String} value of the attribute
+ * @method getAttribute
+ */
+export function getAttribute(el, attribute) {
+  return el.getAttribute(attribute);
+}
+
+/**
+ * Set the value of an element's attribute
+ *
+ * @param {Element} el
+ * @param {String} attribute Attribute to set
+ * @param {String} value Value to set the attribute to
+ * @method setAttribute
+ */
+export function setAttribute(el, attribute, value) {
+  el.setAttribute(attribute, value);
+}
+
+/**
+ * Remove an element's attribute
+ *
+ * @param {Element} el
+ * @param {String} attribute Attribute to remove
+ * @method removeAttribute
+ */
+export function removeAttribute(el, attribute) {
+  el.removeAttribute(attribute);
+}
+
 /**
  * Attempt to block the ability to select text while dragging controls
  *