[Robustness] stringify: cache Object.prototype.hasOwnProperty

ljharb · Feb 14, 2019 · 41c42b8 · 41c42b8
1 parent 04a9017
commit 41c42b8
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/stringify.js b/lib/stringify.js
@@ -2,6 +2,7 @@
 
 var utils = require('./utils');
 var formats = require('./formats');
+var has = Object.prototype.hasOwnProperty;
 
 var arrayPrefixGenerators = {
     brackets: function brackets(prefix) { // eslint-disable-line func-name-matching
@@ -158,7 +159,7 @@ var normalizeStringifyOptions = function normalizeStringifyOptions(opts) {
 
     var format = formats['default'];
     if (typeof opts.format !== 'undefined') {
-        if (!Object.prototype.hasOwnProperty.call(formats.formatters, opts.format)) {
+        if (!has.call(formats.formatters, opts.format)) {
             throw new TypeError('Unknown format option provided.');
         }
         format = opts.format;