feat: add await option for next-tick-style rule

docs/rules/next-tick-style.md

@@ -2,13 +2,13 @@
 pageClass: rule-details
 sidebarDepth: 0
 title: vue/next-tick-style
-description: enforce Promise or callback style in `nextTick`
+description: enforce Promise, Await or callback style in `nextTick`
 since: v7.5.0
 ---
 
 # vue/next-tick-style
 
-> enforce Promise or callback style in `nextTick`
+> enforce Promise, Await or callback style in `nextTick`
 
 - :wrench: The `--fix` option on the [command line](https://eslint.org/docs/user-guide/command-line-interface#fixing-problems) can automatically fix some of the problems reported by this rule.
 
@@ -52,13 +52,45 @@ Default is set to `promise`.
 
 ```json
 {
-  "vue/next-tick-style": ["error", "promise" | "callback"]
+  "vue/next-tick-style": ["error",  "promise" | "await" | "callback"]
 }
 ```
 
 - `"promise"` (default) ... requires using the promise version.
+- `"await"` ... requires using the await syntax version.
 - `"callback"` ... requires using the callback version. Use this if you use a Vue version below v2.1.0.
 
+### `"await"`
+
+<eslint-code-block fix :rules="{'vue/next-tick-style': ['error', 'await']}">
+
+```vue
+<script>
+import { nextTick as nt } from 'vue';
+
+export default {
+  async mounted() {
+    /* ✓ GOOD */
+    await nt(); callback();
+    await Vue.nextTick(); this.callback();
+    await this.$nextTick(); this.callback();
+
+    /* ✗ BAD */
+    nt().then(() => callback());
+    Vue.nextTick().then(() => callback());
+    this.$nextTick().then(() => callback());
+    nt(() => callback());
+    nt(callback);
+    Vue.nextTick(() => callback());
+    Vue.nextTick(callback);
+    this.$nextTick(() => callback());
+    this.$nextTick(callback);
+  }
+}
+</script>
+```
+
+</eslint-code-block>
 ### `"callback"`
 
 <eslint-code-block fix :rules="{'vue/next-tick-style': ['error', 'callback']}">

lib/rules/next-tick-style.js

@@ -79,17 +79,53 @@ function isAwaitedPromise(callExpression) {
   )
 }
 
+/**
+ * @param {CallExpression} callExpression
+ * @returns {boolean}
+ */
+function isAwaitedFunction(callExpression) {
+  return (
+    callExpression.parent.type === 'AwaitExpression' &&
+    callExpression.parent.parent.type !== 'MemberExpression'
+  )
+}
+
+/**
+ * @param {Expression | SpreadElement} callback
+ * @param {SourceCode} sourceCode
+ * @returns {string}
+ */
+function extractCallbackBody(callback, sourceCode) {
+  if (
+    callback.type !== 'FunctionExpression' &&
+    callback.type !== 'ArrowFunctionExpression'
+  ) {
+    return ''
+  }
+
+  if (callback.body.type === 'BlockStatement') {
+    return sourceCode
+      .getText(callback.body)
+      .slice(1, -1) // Remove curly braces
+      .trim()
+  }
+
+  return sourceCode.getText(callback.body)
+}
+
 module.exports = {
   meta: {
     type: 'suggestion',
     docs: {
-      description: 'enforce Promise or callback style in `nextTick`',
+      description: 'enforce Promise, Await or callback style in `nextTick`',
       categories: undefined,
       url: 'https://eslint.vuejs.org/rules/next-tick-style.html'
     },
     fixable: 'code',
-    schema: [{ enum: ['promise', 'callback'] }],
+    schema: [{ enum: ['promise', 'await', 'callback'] }],
     messages: {
+      useAwait:
+        'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
       usePromise:
         'Use the Promise returned by `nextTick` instead of passing a callback function.',
       useCallback:
@@ -123,6 +159,61 @@ module.exports = {
           return
         }
 
+        if (preferredStyle === 'await') {
+          if (
+            callExpression.arguments.length > 0 ||
+            !isAwaitedFunction(callExpression)
+          ) {
+            context.report({
+              node,
+              messageId: 'useAwait',
+              fix(fixer) {
+                const sourceCode = context.getSourceCode()
+
+                // Handle callback to await conversion
+                if (callExpression.arguments.length > 0) {
+                  const [args] = callExpression.arguments
+                  let callbackBody = null
+
+                  callbackBody =
+                    args.type === 'ArrowFunctionExpression' ||
+                    args.type === 'FunctionExpression'
+                      ? extractCallbackBody(args, sourceCode)
+                      : `${sourceCode.getText(args)}()`
+
+                  const nextTickCaller = sourceCode.getText(
+                    callExpression.callee
+                  )
+                  return fixer.replaceText(
+                    callExpression.parent,
+                    `await ${nextTickCaller}();${callbackBody};`
+                  )
+                }
+
+                // Handle promise to await conversion
+                if (isAwaitedPromise(callExpression)) {
+                  const thenCall = callExpression.parent.parent
+                  if (thenCall === null || thenCall.type !== 'CallExpression')
+                    return null
+                  const [thenCallback] = thenCall.arguments
+                  if (thenCallback) {
+                    const thenCallbackBody = extractCallbackBody(
+                      thenCallback,
+                      sourceCode
+                    )
+                    return fixer.replaceText(
+                      thenCall,
+                      `await ${sourceCode.getText(callExpression)};${thenCallbackBody}`
+                    )
+                  }
+                }
+                return null
+              }
+            })
+          }
+
+          return
+        }
         if (
           callExpression.arguments.length > 0 ||
           !isAwaitedPromise(callExpression)

tests/lib/rules/next-tick-style.js

@@ -54,6 +54,18 @@ tester.run('next-tick-style', rule, {
       }</script>`,
       options: ['promise']
     },
+    {
+      filename: 'test.vue',
+      code: `<script>import { nextTick as nt } from 'vue';
+      export default {
+        async mounted() {
+          await this.$nextTick(); callback();
+          await Vue.nextTick(); callback();
+          await nt(); callback();
+        }
+      }</script>`,
+      options: ['await']
+    },
     {
       filename: 'test.vue',
       code: `<script>import { nextTick as nt } from 'vue';
@@ -102,6 +114,22 @@ tester.run('next-tick-style', rule, {
           foo.then(this.$nextTick, catchHandler);
         }
       }</script>`,
+      options: ['await']
+    },
+    {
+      filename: 'test.vue',
+      code: `<script>import { nextTick as nt } from 'vue';
+      export default {
+        mounted() {
+          foo.then(this.$nextTick);
+          foo.then(Vue.nextTick);
+          foo.then(nt);
+
+          foo.then(nt, catchHandler);
+          foo.then(Vue.nextTick, catchHandler);
+          foo.then(this.$nextTick, catchHandler);
+        }
+      }</script>`,
       options: ['callback']
     }
   ],
@@ -237,6 +265,98 @@ tester.run('next-tick-style', rule, {
         }
       ]
     },
+    {
+      filename: 'test.vue',
+      code: `<script>import { nextTick as nt } from 'vue';
+      export default {
+        async mounted() {
+          this.$nextTick(() => callback());
+          Vue.nextTick(() => callback());
+          nt(() => callback());
+
+          this.$nextTick(callback);
+          Vue.nextTick(callback);
+          nt(callback);
+
+          this.$nextTick().then(() => callback());
+          Vue.nextTick().then(() => callback());
+          nt().then(() => callback());
+        }
+      }</script>`,
+      output: `<script>import { nextTick as nt } from 'vue';
+      export default {
+        async mounted() {
+          await this.$nextTick();callback();
+          await Vue.nextTick();callback();
+          await nt();callback();
+
+          await this.$nextTick();callback();
+          await Vue.nextTick();callback();
+          await nt();callback();
+
+          await this.$nextTick();callback();
+          await Vue.nextTick();callback();
+          await nt();callback();
+        }
+      }</script>`,
+      options: ['await'],
+      errors: [
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 4,
+          column: 16
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 5,
+          column: 15
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 6,
+          column: 11
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 8,
+          column: 16
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 9,
+          column: 15
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 10,
+          column: 11
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 12,
+          column: 16
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 13,
+          column: 15
+        },
+        {
+          message:
+            'Use the await keyword with the Promise returned by `nextTick` instead of passing a callback function or using `.then()`.',
+          line: 14,
+          column: 11
+        }
+      ]
+    },
     {
       filename: 'test.vue',
       code: `<script>import { nextTick as nt } from 'vue';