refactor: support child classes

Author: kgryte

lib/node_modules/@stdlib/array/fixed-endian-float64/lib/main.js

@@ -33,6 +33,7 @@ var lowercase = require( '@stdlib/string/base/lowercase' );
 var hasIteratorSymbolSupport = require( '@stdlib/assert/has-iterator-symbol-support' );
 var ITERATOR_SYMBOL = require( '@stdlib/symbol/iterator' );
 var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
+var isPrototypeOf = require( '@stdlib/assert/is-prototype-of' ); // eslint-disable-line stdlib/no-redeclare
 var setReadOnlyAccessor = require( '@stdlib/utils/define-nonenumerable-read-only-accessor' );
 var ArrayBuffer = require( '@stdlib/array/buffer' );
 var DataView = require( '@stdlib/array/dataview' );
@@ -97,7 +98,10 @@ function isFloat64ArrayFE( value ) {
 	return (
 		typeof value === 'object' &&
 		value !== null &&
-		value.constructor.name === 'Float64ArrayFE' &&
+		(
+			value.constructor.name === 'Float64ArrayFE' ||
+			isPrototypeOf( value, Float64ArrayFE.prototype )
+		) &&
 		value.BYTES_PER_ELEMENT === BYTES_PER_ELEMENT
 	);
 }
@@ -231,7 +235,7 @@ function Float64ArrayFE() {
 	} else {
 		buf = arguments[ 1 ];
 		if ( !isArrayBuffer( buf ) ) {
-			throw new TypeError( format( 'invalid argument. First argument must be an ArrayBuffer. Value: `%s`.', buf ) );
+			throw new TypeError( format( 'invalid argument. Must provide an ArrayBuffer. Value: `%s`.', buf ) );
 		}
 		byteOffset = arguments[ 2 ];
 		if ( !isNonNegativeInteger( byteOffset ) ) {