util: convert inspect.styles and inspect.colors to prototype-less obj…

…ects Use a prototype-less object for inspect.styles and inspect.colors to allow modification of Object.prototype in the REPL. Fixes: #11614 PR-URL: #11624 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Timothy Gu <[email protected]>
nodejs · Mar 6, 2017 · aab0d20 · aab0d20
1 parent fd17e8b
commit aab0d20
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/lib/util.js b/lib/util.js
@@ -166,7 +166,7 @@ Object.defineProperty(inspect, 'defaultOptions', {
 });
 
 // http:https://en.wikipedia.org/wiki/ANSI_escape_code#graphics
-inspect.colors = {
+inspect.colors = Object.assign(Object.create(null), {
  'bold': [1, 22],
  'italic': [3, 23],
  'underline': [4, 24],
@@ -180,10 +180,10 @@ inspect.colors = {
  'magenta': [35, 39],
  'red': [31, 39],
  'yellow': [33, 39]
-};
+});
 
 // Don't use 'blue' not visible on cmd.exe
-inspect.styles = {
+inspect.styles = Object.assign(Object.create(null), {
  'special': 'cyan',
  'number': 'yellow',
  'boolean': 'yellow',
@@ -194,7 +194,7 @@ inspect.styles = {
  'date': 'magenta',
  // "name": intentionally not styling
  'regexp': 'red'
-};
+});
 
 const customInspectSymbol = internalUtil.customInspectSymbol;