Fix linting, warnings, add noinspection suppression comments.

lib/Matrix2D.js

@@ -79,13 +79,13 @@ export default class Matrix2D {
      * @return {Matrix2D} This instance. Useful for chaining method calls.
      */
     setTransform = function(a, b, c, d, tx, ty) {
-        /*eslint eqeqeq:0*/
-        this.a = a == null ? 1 : a;
+        this.a = a === null || a === undefined ? 1 : a;
         this.b = b || 0;
         this.c = c || 0;
-        this.d = d == null ? 1 : d;
+        this.d = d === null || d === undefined ? 1 : d;
         this.tx = tx || 0;
         this.ty = ty || 0;
+        //noinspection JSValidateTypes
         return this;
     };
 
@@ -97,6 +97,7 @@ export default class Matrix2D {
     reset = function() {
         this.a = this.d = 1;
         this.b = this.c = this.tx = this.ty = 0;
+        //noinspection JSValidateTypes
         return this;
     };
 
@@ -109,6 +110,7 @@ export default class Matrix2D {
         return [this.a, this.b, this.c, this.d, this.tx, this.ty];
     };
 
+    //noinspection JSUnusedGlobalSymbols
     /**
      * Copies all properties from the specified matrix to this matrix.
      * @method copy
@@ -116,9 +118,11 @@ export default class Matrix2D {
      * @return {Matrix2D} This matrix. Useful for chaining method calls.
      */
     copy = function(matrix) {
+        //noinspection JSUnresolvedVariable
         return this.setTransform(matrix.a, matrix.b, matrix.c, matrix.d, matrix.tx, matrix.ty);
     };
 
+    //noinspection JSUnusedGlobalSymbols
     /**
      * Clones current instance and returning a new matrix.
      * @method clone
@@ -142,9 +146,9 @@ export default class Matrix2D {
      * @return {Matrix2D} This matrix. Useful for chaining method calls.
      **/
     prepend = function(a, b, c, d, tx, ty) {
-        var a1 = this.a;
-        var c1 = this.c;
-        var tx1 = this.tx;
+        const a1 = this.a;
+        const c1 = this.c;
+        const tx1 = this.tx;
 
         this.a  = a * a1 + c * this.b;
         this.b  = b * a1 + d * this.b;
@@ -152,6 +156,7 @@ export default class Matrix2D {
         this.d  = b * c1 + d * this.d;
         this.tx = a * tx1 + c * this.ty + tx;
         this.ty = b * tx1 + d * this.ty + ty;
+        //noinspection JSValidateTypes
         return this;
     };
 
@@ -168,10 +173,10 @@ export default class Matrix2D {
      * @return {Matrix2D} This matrix. Useful for chaining method calls.
      **/
     append = function(a, b, c, d, tx, ty) {
-        var a1 = this.a;
-        var b1 = this.b;
-        var c1 = this.c;
-        var d1 = this.d;
+        const a1 = this.a;
+        const b1 = this.b;
+        const c1 = this.c;
+        const d1 = this.d;
         if (a !== 1 || b !== 0 || c !== 0 || d !== 1) {
             this.a  = a1 * a + c1 * b;
             this.b  = b1 * a + d1 * b;
@@ -180,6 +185,7 @@ export default class Matrix2D {
         }
         this.tx = a1 * tx + c1 * ty + this.tx;
         this.ty = b1 * tx + d1 * ty + this.ty;
+        //noinspection JSValidateTypes
         return this;
     };
 
@@ -202,10 +208,11 @@ export default class Matrix2D {
      * @return {Matrix2D} This matrix. Useful for chaining method calls.
      **/
     appendTransform = function(x, y, scaleX, scaleY, rotation, skewX, skewY, regX, regY) {
+        let cos, sin;
         if (rotation % 360) {
-            var r = rotation * DEG_TO_RAD;
-            var cos = Math.cos(r);
-            var sin = Math.sin(r);
+            const r = rotation * DEG_TO_RAD;
+            cos = Math.cos(r);
+            sin = Math.sin(r);
         } else {
             cos = 1;
             sin = 0;
@@ -226,9 +233,11 @@ export default class Matrix2D {
             this.tx -= regX * this.a + regY * this.c;
             this.ty -= regX * this.b + regY * this.d;
         }
+        //noinspection JSValidateTypes
         return this;
     };
 
+    //noinspection JSUnusedGlobalSymbols
     /**
      * Generates matrix properties from the specified display object transform properties, and prepends them to this matrix.
      * For example, you could calculate the combined transformation for a child object using:
@@ -255,10 +264,11 @@ export default class Matrix2D {
      * @return {Matrix2D} This matrix. Useful for chaining method calls.
      **/
     prependTransform = function(x, y, scaleX, scaleY, rotation, skewX, skewY, regX, regY) {
+        let cos, sin;
         if (rotation % 360) {
-            var r = rotation * DEG_TO_RAD;
-            var cos = Math.cos(r);
-            var sin = Math.sin(r);
+            const r = rotation * DEG_TO_RAD;
+            cos = Math.cos(r);
+            sin = Math.sin(r);
         } else {
             cos = 1;
             sin = 0;
@@ -277,6 +287,7 @@ export default class Matrix2D {
         } else {
             this.prepend(cos * scaleX, sin * scaleX, -sin * scaleY, cos * scaleY, x, y);
         }
+        //noinspection JSValidateTypes
         return this;
     };
 }