Section 1: Editorial - possible syntax error

[magnus-git]

During the security review, in example 4 in introduction: navigator.geolocation.getCurrentPosition(successCallback, errorCallback, { maximumAge: 600000, }); The comma after 600000 seems spurious.

[reillyeon]

Trailing commas are not syntax errors in Javascript. Leaving a trailing comma in a multi-line object literal makes it easier to add new keys without modifying nearby lines.