allow modifier key modifiers on keyboard events and warn overwriting in config.keyCodes

flow/component.js

@@ -105,7 +105,7 @@ declare interface Component {
   // apply v-bind object
   _b: (data: any, value: any, asProp?: boolean) => VNodeData;
   // check custom keyCode
-  _k: (eventKeyCode: number, key: string, buildinAlias: number | Array<number> | void) => boolean;
+  _k: (eventKeyCode: number, key: string, builtInAlias: number | Array<number> | void) => boolean;
 
   // allow dynamic method registration
   [key: string]: any

src/compiler/codegen/events.js

@@ -19,11 +19,7 @@ const keyCodes = {
 const modifierCode = {
   stop: '$event.stopPropagation();',
   prevent: '$event.preventDefault();',
-  self: 'if($event.target !== $event.currentTarget)return;'
-}
-
-const isMouseEventRE = /^mouse|^pointer|^(click|dblclick|contextmenu|wheel)$/
-const mouseEventModifierCode = {
+  self: 'if($event.target !== $event.currentTarget)return;',
   ctrl: 'if(!$event.ctrlKey)return;',
   shift: 'if(!$event.shiftKey)return;',
   alt: 'if(!$event.altKey)return;',
@@ -53,12 +49,9 @@ function genHandler (
   } else {
     let code = ''
     const keys = []
-    const isMouseEvnet = isMouseEventRE.test(name)
     for (const key in handler.modifiers) {
       if (modifierCode[key]) {
         code += modifierCode[key]
-      } else if (isMouseEvnet && mouseEventModifierCode[key]) {
-        code += mouseEventModifierCode[key]
       } else {
         keys.push(key)
       }
@@ -74,8 +67,7 @@ function genHandler (
 }
 
 function genKeyFilter (keys: Array<string>): string {
-  const code = keys.map(genFilterCode)
-  return `if(${code.join('&&')})return;`
+  return `if(${keys.map(genFilterCode).join('&&')})return;`
 }
 
 function genFilterCode (key: number | string): string {

src/core/instance/proxy.js

@@ -1,5 +1,6 @@
 /* not type checking this file because flow doesn't play well with Proxy */
 
+import config from 'core/config'
 import { warn, makeMap } from '../util/index'
 
 let initProxy
@@ -25,6 +26,19 @@ if (process.env.NODE_ENV !== 'production') {
     typeof Proxy !== 'undefined' &&
     Proxy.toString().match(/native code/)
 
+  if (hasProxy) {
+    const isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta')
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(`Avoid overwriting built-in modifier in config.keyCodes: .${key}`)
+        } else {
+          target[key] = value
+        }
+      }
+    })
+  }
+
   const hasHandler = {
     has (target, key) {
       const has = key in target

src/core/instance/render.js

@@ -242,9 +242,9 @@ export function renderMixin (Vue: Class<Component>) {
   Vue.prototype._k = function checkKeyCodes (
     eventKeyCode: number,
     key: string,
-    buildinAlias: number | Array<number> | void
+    builtInAlias: number | Array<number> | void
   ): boolean {
-    const keyCodes = config.keyCodes[key] || buildinAlias
+    const keyCodes = config.keyCodes[key] || builtInAlias
     if (Array.isArray(keyCodes)) {
       return keyCodes.indexOf(eventKeyCode) === -1
     } else {