[BUGFIX beta] Reusing element causes problems in Safari

When testing allowed input types, in some versions of Safari the type
cannot be change to `file` if previously set to a different one.

Fixes #14727

Author: anon4562

packages/ember-glimmer/lib/components/text_field.js

@@ -8,7 +8,6 @@ import Component from '../component';
 import layout from '../templates/empty';
 import { TextSupport } from 'ember-views';
 
-let inputTypeTestElement;
 const inputTypes = Object.create(null);
 function canSetTypeOfInput(type) {
   if (type in inputTypes) {
@@ -23,9 +22,7 @@ function canSetTypeOfInput(type) {
     return type;
   }
 
-  if (!inputTypeTestElement) {
-    inputTypeTestElement = document.createElement('input');
-  }
+  let inputTypeTestElement = document.createElement('input');
 
   try {
     inputTypeTestElement.type = type;

packages/ember-glimmer/tests/integration/helpers/input-test.js

@@ -425,6 +425,13 @@ moduleFor('Helpers test: {{input}}', class extends InputRenderingTest {
       keyCode: 65
     });
   }
+
+  ['@test GH#14727 can render a file input after having had render an input of other type']() {
+    this.render(`{{input type="text"}}{{input type="file"}}`);
+
+    this.assert.equal(this.$input()[0].type, 'text');
+    this.assert.equal(this.$input()[1].type, 'file');
+  }
 });
 
 moduleFor('Helpers test: {{input}} with dynamic type', class extends InputRenderingTest {