From: Evan You <yyx990803@gmail.com>
Date: Mon, 20 Apr 2020 19:32:21 +0000 (-0400)
Subject: feat(runtime-core): more specific warning for failed v-on fallthrough
X-Git-Tag: v3.0.0-beta.3~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab844fd1692007cf2be4d01a9062caa36fa1d280;p=thirdparty%2Fvuejs%2Fcore.git

feat(runtime-core): more specific warning for failed v-on fallthrough

close #1001
---

diff --git a/packages/runtime-core/src/componentRenderUtils.ts b/packages/runtime-core/src/componentRenderUtils.ts
index 1074edf9dc..3a9f8d888c 100644
--- a/packages/runtime-core/src/componentRenderUtils.ts
+++ b/packages/runtime-core/src/componentRenderUtils.ts
@@ -107,11 +107,16 @@ export function renderComponentRoot(
           root.patchFlag |= PatchFlags.FULL_PROPS
         }
       } else if (__DEV__ && !accessedAttrs && root.type !== Comment) {
+        const hasListeners = Object.keys(attrs).some(isOn)
         warn(
           `Extraneous non-props attributes (` +
             `${Object.keys(attrs).join(', ')}) ` +
             `were passed to component but could not be automatically inherited ` +
-            `because component renders fragment or text root nodes.`
+            `because component renders fragment or text root nodes.` +
+            (hasListeners
+              ? ` If the v-on listener is intended to be a component custom ` +
+                `event listener only, declare it using the "emits" option.`
+              : ``)
         )
       }
     }