String.trim
Now, Microsoft/Apple/Google, how about you guys add support for the new/experimental/convenience Javascript features (String.trim, String.startsWith...)
Sure those are still missing? developer.mozilla.org lists String.trim() as being supported by Chrome, Firefox since version 3.5, IE since 9, Opera since 10.5, Safari since 5. The String.startsWith() needs a bit newer browser, but is supported by Chrome 41, IE 12, Opera 41, Safari 9. You cannot expect Microsoft/Apple/Google to do anything about their older browser versions.