javascript - Is the 'catch' method name of JS Promises/A+ invalid since it's a JS keyword? -

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i started use js promises in project recently. noticed every time use .catch js linter complains. run , should looked ecmascript spec , looks right: since catch keyword can not used identifier. understand method names identifiers, invalid:

promise.reject("duh").catch(alert);

it should instead:

promise.reject("duh")['catch'](alert);

what missing?

what missing?

a property name not identifier, can use identifier name. spec on property accessors:

memberexpression : memberexpression . identifiername callexpression : callexpression . identifiername

and identifiers:

identifier :: identifiername not reservedword

you can use arbitrary identifer name (but not things integers) in dot property access, can't use [reserved] keywords identifier, e.g. in variable or function name.

however, did change es5, in ecmascript 3 property names required identiers. that's why still need use bracket notation keywords if want support legacy browsers; , it's reason why linter complains it. same holds property names in object literals.


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