📈 performance(format): use hasOwn function of Vue.util

src/extend.js

@@ -1,5 +1,5 @@
 import { warn } from './util'
-import format from './format'
+import Format from './format'
 import { getValue } from './path'
 
 
@@ -12,6 +12,7 @@ import { getValue } from './path'
 
 export default function (Vue) {
   const { isObject } = Vue.util
+  const format = Format(Vue)
 
   function parseArgs (...args) {
     let lang = Vue.config.lang

src/format.js

@@ -7,36 +7,42 @@
 const RE_NARGS = /(%|)\{([0-9a-zA-Z_]+)\}/g
 
 
-/**
- * template
- *  
- * @param {String} string
- * @param {Array} ...args
- * @return {String}
- */
+export default function (Vue) {
+  const { hasOwn } = Vue.util
+
+  /**
+   * template
+   *  
+   * @param {String} string
+   * @param {Array} ...args
+   * @return {String}
+   */
+
+  function template (string, ...args) {
+    if (args.length === 1 && typeof args[0] === 'object') {
+      args = args[0]
+    }
 
-export default function (string, ...args) {
-  if (args.length === 1 && typeof args[0] === 'object') {
-    args = args[0]
-  }
+    if (!args || !args.hasOwnProperty) {
+      args = {}
+    }
 
-  if (!args || !args.hasOwnProperty) {
-    args = {}
-  }
+    return string.replace(RE_NARGS, (match, prefix, i, index) => {
+      let result
 
-  return string.replace(RE_NARGS, (match, prefix, i, index) => {
-    let result
+      if (string[index - 1] === '{'
+        && string[index + match.length] === '}') {
+        return i
+      } else {
+        result = hasOwn(args, i) ? args[i] : null
+        if (result === null || result === undefined) {
+          return ''
+        }
 
-    if (string[index - 1] === '{'
-      && string[index + match.length] === '}') {
-      return i
-    } else {
-      result = args.hasOwnProperty(i) ? args[i] : null
-      if (result === null || result === undefined) {
-        return ''
+        return result
       }
+    })
+  }
 
-      return result
-    }
-  })
+  return template
 }

test/specs/format.js

@@ -1,5 +1,8 @@
+import Vue from 'vue'
 import assert from 'power-assert'
-import format from '../../src/format'
+import Format from '../../src/format'
+
+const format = Format(Vue)
 
 
 describe('format', () => {