extract a-data-view helper

Author: zloirock

packages/core-js/internals/a-data-view.js

@@ -0,0 +1,9 @@
+'use strict';
+var classof = require('../internals/classof');
+
+var $TypeError = TypeError;
+
+module.exports = function (argument) {
+  if (classof(argument) === 'DataView') return argument;
+  throw new $TypeError('Argument is not a DataView');
+};

packages/core-js/modules/esnext.data-view.set-float16.js

@@ -1,20 +1,19 @@
 'use strict';
 var $ = require('../internals/export');
 var uncurryThis = require('../internals/function-uncurry-this');
-var classof = require('../internals/classof');
+var aDataView = require('../internals/a-data-view');
 var toIndex = require('../internals/to-index');
 var packIEEE754 = require('../internals/ieee754').pack;
 var f16round = require('../internals/math-f16round');
 
-var $TypeError = TypeError;
 // eslint-disable-next-line es/no-typed-arrays -- safe
 var setUint16 = uncurryThis(DataView.prototype.setUint16);
 
 // `DataView.prototype.setFloat16` method
 // https://github.com/tc39/proposal-float16array
 $({ target: 'DataView', proto: true }, {
   setFloat16: function setFloat16(byteOffset, value /* , littleEndian */) {
-    if (classof(this) !== 'DataView') throw new $TypeError('Incorrect receiver');
+    aDataView(this);
     var offset = toIndex(byteOffset);
     var bytes = packIEEE754(f16round(value), 10, 2);
     return setUint16(this, offset, bytes[1] << 8 | bytes[0], arguments.length > 2 ? arguments[2] : false);

packages/core-js/modules/esnext.data-view.set-uint8-clamped.js

@@ -1,19 +1,18 @@
 'use strict';
 var $ = require('../internals/export');
 var uncurryThis = require('../internals/function-uncurry-this');
-var classof = require('../internals/classof');
+var aDataView = require('../internals/a-data-view');
 var toIndex = require('../internals/to-index');
 var toUint8Clamped = require('../internals/to-uint8-clamped');
 
-var $TypeError = TypeError;
 // eslint-disable-next-line es/no-typed-arrays -- safe
 var setUint8 = uncurryThis(DataView.prototype.setUint8);
 
 // `DataView.prototype.setUint8Clamped` method
 // https://github.com/tc39/proposal-dataview-get-set-uint8clamped
 $({ target: 'DataView', proto: true, forced: true }, {
   setUint8Clamped: function setUint8Clamped(byteOffset, value) {
-    if (classof(this) !== 'DataView') throw new $TypeError('Incorrect receiver');
+    aDataView(this);
     var offset = toIndex(byteOffset);
     return setUint8(this, offset, toUint8Clamped(value));
   }