From 9b25475b97744e62fc46092b67316335892e9611 Mon Sep 17 00:00:00 2001
From: Pine Wu <octref@gmail.com>
Date: Tue, 23 Apr 2019 20:17:24 -0700
Subject: [PATCH] More docs

---
 docs/interpolation.md | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/docs/interpolation.md b/docs/interpolation.md
index 22a4a343ff..7e7c276b60 100644
--- a/docs/interpolation.md
+++ b/docs/interpolation.md
@@ -36,4 +36,27 @@ Completion:
 
 - Collects information from `<script>` region by traversing its AST
 - Offer `props`, `data` and `methods` in interpolation regions
-- Offer `:prop` completion on child components
\ No newline at end of file
+- Offer `:prop` completion on child components
+
+## Type Checking with JSDocs
+
+You don't have to use `lang="ts"` for typing functions. This would show error that `'foo'` is not assignable to `number`
+
+```vue
+<template>
+  <div>{{ numOnly('foo') }}</div>
+</template>
+
+<script>
+export default {
+  methods: {
+    /**
+     * @param {number} num
+     */
+    numOnly(num) {
+
+    }
+  }
+}
+</script>
+```