Skip conditional expressions in vue/valid-next-tick (#1777)

Author: FloEdelmann

Diff for: lib/rules/valid-next-tick.js

@@ -142,7 +142,12 @@ module.exports = {
           return
         }
 
-        const parentNode = nextTickNode.parent
+        let parentNode = nextTickNode.parent
+
+        // skip conditional expressions like `foo ? nextTick : bar`
+        if (parentNode.type === 'ConditionalExpression') {
+          parentNode = parentNode.parent
+        }
 
         if (
           parentNode.type === 'CallExpression' &&

Diff for: tests/lib/rules/valid-next-tick.js

@@ -129,6 +129,19 @@ tester.run('valid-next-tick', rule, {
           },
         }
       }</script>`
+    },
+
+    // https://github.com/vuejs/eslint-plugin-vue/issues/1776
+    {
+      filename: 'test.vue',
+      code: `<script>import { nextTick as nt } from 'vue';
+      export default {
+        mounted() {
+          let foo = bar ? nt : undefined;
+          foo = bar ? Vue.nextTick : undefined;
+          foo = bar ? this.$nextTick : undefined;
+        }
+      }</script>`
     }
   ],
   invalid: [