NativeScript ES5 compatibility table

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NativeScript V8 JavaScriptCore
⬤ Minor difference (1 point) ⬤ Small feature (2 points) ⬤ Medium feature (4 points) ⬤ Large feature (8 points)

			NativeScript						Desktop browsers
Feature name	Current browser		NS 6.5 Android v8	NS 7.0 Android v8	NS 8.0 Android v8	NS 6.5 iOS JSC	NS 7.0 iOS v8	NS 8.0 iOS v8	CH 89	CH 90	SF 14 Beta	SF TP
§Object/array literal extensions	5/5	5/5	5/5	5/5	5/5	5/5	5/5	5/5	5/5	5/5
§Getter accessors	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Setter accessors	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Trailing commas in object literals	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Trailing commas in array literals	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Reserved words as property names	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes

§Object static methods	13/13	13/13	13/13	13/13	13/13	13/13	13/13	13/13	13/13	13/13
§Object.create	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.defineProperty	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.defineProperties	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.getPrototypeOf	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.keys	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.seal	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.freeze	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.preventExtensions	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.isSealed	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.isFrozen	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.isExtensible	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.getOwnPropertyDescriptor	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Object.getOwnPropertyNames	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array methods	12/12	12/12	12/12	12/12	12/12	12/12	12/12	12/12	12/12	12/12
§Array.isArray	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.indexOf	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.lastIndexOf	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.every	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.some	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.forEach	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.map	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.filter	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.reduce	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.reduceRight	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.sort: compareFn must be function or undefined	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Array.prototype.sort: compareFn may be explicit undefined	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§String properties and methods	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3
§Property access on strings	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§String.prototype.split	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§String.prototype.trim	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Date methods	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3
§Date.prototype.toISOString	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Date.now	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Date.prototype.toJSON	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Function.prototype.bind	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§JSON	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes

§Immutable globals	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3	3/3
§undefined	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§NaN	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Infinity	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Miscellaneous	8/8	8/8	8/8	7/8	8/8	8/8	8/8	8/8	8/8	8/8
§Function.prototype.apply permits array-likes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§parseInt ignores leading zeros	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Function "prototype" property is non-enumerable	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Arguments toStringTag is "Arguments"	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Zero-width chars in identifiers	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Unreserved words	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Enumerable properties can be shadowed by non-enumerables	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes
§Thrown functions have proper "this" values	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§Strict mode	19/19	19/19	19/19	19/19	19/19	19/19	19/19	19/19	19/19	19/19
§reserved words	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§"this" is undefined in functions	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§"this" is not coerced to object in primitive methods	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§"this" is not coerced to object in primitive accessors	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§legacy octal is a SyntaxError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§assignment to unresolvable identifiers is a ReferenceError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§assignment to eval or arguments is a SyntaxError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§assignment to non-writable properties is a TypeError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§eval or arguments bindings is a SyntaxError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§arguments.caller removed or is a TypeError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§arguments.callee is a TypeError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§(function(){}).caller and (function(){}).arguments is a TypeError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§arguments is unmapped	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§eval() can't create bindings	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§deleting bindings is a SyntaxError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§deleting non-configurable properties is a TypeError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§"with" is a SyntaxError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§repeated parameter names is a SyntaxError	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
§function expressions with matching name and argument are valid	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes

Thanks to Kangax, webspacedspace, zloirock and the rest of the people who contributed to Kangax ES Compatibility Table

This site uses the base of the awesome compat-table and adds all the code to handle the additional testing on the NativeScript runtimes, and ability to export the data and collate it back to these tables...