Settings: String#startsWith, Array#fill, String#endsWith errors on localhost settings/traffic

[allendav]

Steps to reproduce

1. Using Chrome (to see the Errors reported)
2. Starting at URL: http://calypso.localhost:3000/settings/traffic/{DOMAIN}
3. Observe the errors in dev console
4. Miss the other errors you should have caught before starting your code review :)

These errors could cause the settings/traffic page to not work correctly on Internet Explorer clients.

What I expected

Clean, quiet dev console

What happened instead

Very angry dev console

Browser / OS version

Chrome 61 on OSX High Sierra

See also #2360 and #13271

[allendav]

Seems to be coming from the TitleFormatEditor component

[allendav]

Apparently this is unavoidable at this time

wp-calypso/client/components/title-format-editor/index.jsx

Line 14 in 5f15f33

// The following polyfills exist for the draft-js editor, since

As a workaround, you can remove this call to lib/wrap-es6-functions to remove the console warnings

wp-calypso/client/boot/app.js

Lines 5 to 7 in b855b7a

	if ( process.env.NODE_ENV === 'development' ) {
	require( 'lib/wrap-es6-functions' )();
	}

[stale]

This issue has been marked as stale and will be closed in seven days. This happened because:

• It has been inactive in the past 9 months.
• It isn't a project or a milestone, and hasn’t been labeled `[Pri] Blocker`, `[Pri] High`, `[Status] Keep Open`, or `OSS Citizen`.

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