diff --git a/src/builder.js b/src/builder.js
index c770920..e602ab8 100644
--- a/src/builder.js
+++ b/src/builder.js
@@ -166,7 +166,7 @@ const builder = {
       * @returns {Component}
       */
      textarea: function (attr = {}) {
-          return new InputComponentComponent(
+          return new InputComponent(
                document.createElement("textarea"),
                attr
           )
diff --git a/src/sizeSide/border.js b/src/sizeSide/border.js
index 8e92f18..7dda89a 100644
--- a/src/sizeSide/border.js
+++ b/src/sizeSide/border.js
@@ -147,7 +147,7 @@ class Border extends Sides {
     setLineStyles(refSideStyleMap) {
         let rkeys = Object.keys(refSideStyleMap);
         for (let i = 0; i < array.length; i++) {
-            this._sidingStyles.setBySidingRef(rkeys[i]) = refSideStyleMap[rkeys[i]];
+            this._sidingStyles.setBySidingRef(rkeys[i], refSideStyleMap[rkeys[i]]);
         }
         return this;
     }
diff --git a/src/sizeSide/shapes.js b/src/sizeSide/shapes.js
index f8b2f4f..6e2cd36 100644
--- a/src/sizeSide/shapes.js
+++ b/src/sizeSide/shapes.js
@@ -50,7 +50,7 @@ class Shape extends DirectionUnitDependentAttribute {
      * @returns {Shape}
      */
     bottomRight(amount) {
-        this.fThird = amount;
+        this._fThird = amount;
         return this;
     }
     /**