Instead of this, use Paul Miller's solution: https://github.com/paulmillr/console-polyfill

gistfile1.js

// Make console methods no-ops in unsupported browsers, complete
// More versions: <http://evanhahn.com/?p=990>

var noop = function(){};
window.console || (window.console = {});
window.console.assert || (window.console.assert = noop);
window.console.clear || (window.console.clear = noop);
window.console.count || (window.console.count = noop);
window.console.debug || (window.console.debug = noop);
window.console.dir || (window.console.dir = noop);
window.console.dirxml || (window.console.dirxml = noop);
window.console.error || (window.console.error = noop);
window.console.exception || (window.console.exception = noop);
window.console.group || (window.console.group = noop);
window.console.groupCollapsed || (window.console.groupCollapsed = noop);
window.console.groupEnd || (window.console.groupEnd = noop);
window.console.info || (window.console.info = noop);
window.console.log || (window.console.log = noop);
window.console.markTimeline || (window.console.markTimeline = noop);
window.console.profile || (window.console.profile = noop);
window.console.profileEnd || (window.console.profileEnd = noop);
window.console.table || (window.console.table = noop);
window.console.time || (window.console.time = noop);
window.console.timeEnd || (window.console.timeEnd = noop);
window.console.timeStamp || (window.console.timeStamp = noop);
window.console.trace || (window.console.trace = noop);
window.console.warn || (window.console.warn = noop);
window.console.memory || (window.console.memory = { jsHeapSizeLimit: 0, totalJSHeapSize: 0, usedJSHeapSize: 0 });
window.console.profiles || (window.console.profiles = []);

// by Evan Hahn (evanhahn.com)

// This is free and unencumbered software released into the public domain.

// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.

// In jurisdictions that recognize copyright laws, the author or authors
// of this software dedicate any and all copyright interest in the
// software to the public domain. We make this dedication for the benefit
// of the public at large and to the detriment of our heirs and
// successors. We intend this dedication to be an overt act of
// relinquishment in perpetuity of all present and future rights to this
// software under copyright law.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

// For more information, please refer to <http://unlicense.org/>