pull $emit out of create-option function

src/components/Select.vue

@@ -296,8 +296,7 @@
                 `to generate unique key. Please provide'getOptionKey' prop ` +
                 `to return a unique key for each option.\n` +
                 'https://vue-select.org/api/props.html#getoptionkey'
-              )
-              return null
+              );
             }
           }
         }
@@ -402,14 +401,9 @@
        */
       createOption: {
         type: Function,
-        default(newOption) {
-          if (typeof this.optionList[0] === 'object') {
-            newOption = {[this.label]: newOption}
-          }
-
-          this.$emit('option:created', newOption)
-          return newOption
-        }
+        default (option) {
+          return (typeof this.optionList[0] === 'object') ? {[this.label]: option} : option;
+        },
       },
 
       /**
@@ -581,7 +575,8 @@
       select(option) {
         if (!this.isOptionSelected(option)) {
           if (this.taggable && !this.optionExists(option)) {
-            option = this.createOption(option)
+            option = this.createOption(option);
+            this.$emit('option:created', option);
           }
           if (this.multiple) {
             option = this.selectedValue.concat(option)

tests/unit/Tagging.spec.js

@@ -80,6 +80,20 @@ describe("When Tagging Is Enabled", () => {
     expect(Select.vm.optionList).toEqual(["one", "two", "three"]);
   });
 
+  it("should pushTags even if the consumer has defined a createOption callback", () => {
+    const Select = selectWithProps({
+      pushTags: true,
+      taggable: true,
+      createOption: option => option,
+      options: ["one", "two"]
+    });
+
+    searchSubmit(Select, "three");
+
+    expect(Select.vm.pushedTags).toEqual(["three"]);
+    expect(Select.vm.optionList).toEqual(["one", "two", "three"]);
+  });
+
   it("should add a freshly created option/tag to the options list when pushTags is true and filterable is false", () => {
     const Select = selectWithProps({
       filterable: false,