Added a plugin which will split pasted text on new line

src/plugins/split_new_line_onpaste/split_new_line_onpaste.js

@@ -0,0 +1,54 @@
+/**
+ *
+ * Plugin: "split_new_line_onpaste" (selectize.js)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the License at:
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+ * ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ *
+ * @author [ddofborg](https://github.com/ddofborg)
+ *
+ */
+
+Selectize.define("split_new_line_onpaste", function (options) {
+	/*
+		This plugin will split the pasted text on new line
+		and on the RegEx as defined in `self.settings.splitOn`.
+		After both splits new items will be created.
+	 */
+	var self = this;
+	var splitOn = '\n';
+
+	self.onPaste = (function() {
+		var originalPaste = self.onPaste;
+
+		return function(e) {
+			e.preventDefault();
+			// Check if there is a clipboard event with data
+			if(!e.originalEvent || !e.originalEvent.clipboardData) { return; }
+			var pastedText = e.originalEvent.clipboardData.getData("text/plain");
+			if(!pastedText) { return; }
+			// split on new line
+			var splitInput = pastedText.trim().split(splitOn);
+			// if there is a global split parts on that and make one list of items
+			if(self.settings.splitOn) {
+				splitInput = splitInput.map(part => part.split(self.settings.splitOn));
+				splitInput = splitInput.flat();
+			}
+			// create new elements
+			for (var i = 0, n = splitInput.length; i < n; i++) {
+				if(!self.createItem(splitInput[i])) {
+					self.addItem(splitInput[i]);
+				}
+			}
+
+			return originalPaste.apply(this, arguments);
+		}
+	}());
+
+});