Fix the type of copyWithin (#53340)

Author: ericbf

src/lib/es2015.core.d.ts

@@ -38,10 +38,10 @@ interface Array<T> {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 }
 
 interface ArrayConstructor {

src/lib/es2020.bigint.d.ts

@@ -147,10 +147,10 @@ interface BigInt64Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /** Yields index, value pairs for every entry in the array. */
     entries(): IterableIterator<[number, bigint]>;
@@ -419,10 +419,10 @@ interface BigUint64Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /** Yields index, value pairs for every entry in the array. */
     entries(): IterableIterator<[number, bigint]>;

src/lib/es5.d.ts

@@ -1849,10 +1849,10 @@ interface Int8Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -2131,10 +2131,10 @@ interface Uint8Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -2413,10 +2413,10 @@ interface Uint8ClampedArray {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -2694,10 +2694,10 @@ interface Int16Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -2976,10 +2976,10 @@ interface Uint16Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -3258,10 +3258,10 @@ interface Int32Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -3540,10 +3540,10 @@ interface Uint32Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -3821,10 +3821,10 @@ interface Float32Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.
@@ -4104,10 +4104,10 @@ interface Float64Array {
      * @param target If target is negative, it is treated as length+target where length is the
      * length of the array.
      * @param start If start is negative, it is treated as length+start. If end is negative, it
-     * is treated as length+end.
+     * is treated as length+end. If start is omitted, `0` is used.
      * @param end If not specified, length of the this object is used as its default value.
      */
-    copyWithin(target: number, start: number, end?: number): this;
+    copyWithin(target: number, start?: number, end?: number): this;
 
     /**
      * Determines whether all the members of an array satisfy the specified test.