all these changes

frontend/node_modules/@testing-library/user-event/dist/cjs/document/copySelection.js

@@ -0,0 +1,29 @@
+'use strict';
+
+var DataTransfer = require('../utils/dataTransfer/DataTransfer.js');
+require('../utils/dataTransfer/Clipboard.js');
+var getWindow = require('../utils/misc/getWindow.js');
+var selection = require('../utils/focus/selection.js');
+var UI = require('./UI.js');
+
+function copySelection(target) {
+    const data = selection.hasOwnSelection(target) ? {
+        'text/plain': readSelectedValueFromInput(target)
+    } : {
+        'text/plain': String(target.ownerDocument.getSelection())
+    };
+    const dt = DataTransfer.createDataTransfer(getWindow.getWindow(target));
+    for(const type in data){
+        if (data[type]) {
+            dt.setData(type, data[type]);
+        }
+    }
+    return dt;
+}
+function readSelectedValueFromInput(target) {
+    const sel = UI.getUISelection(target);
+    const val = UI.getUIValue(target);
+    return val.substring(sel.startOffset, sel.endOffset);
+}
+
+exports.copySelection = copySelection;