jshint / jshint / 2459

100%

Build Type

push

travis-ci

Committed by Mike Pennisi

Commit Message

[[FEAT]] Error for literals on rhs of `instanceof`

This patch adds a new error that is used when a literal is found on the
right-hand side of the `instanceof` infix operator. A warning is used when a
function declaration is found.

Literals generate errors:

    x instanceof 0;
    x instanceof '';
    x instanceof null;
    x instanceof undefined;
    x instanceof {};
    x instanceof [];
    x instanceof /./;
    x instanceof ``;

Function declarations generate warnings:

    x instanceof function() {};
    x instanceof function MyUnusableFunction() {};

But this is okay:

    x instanceof /x/.constructor;
    x instanceof "".constructor;

as per GH-2773

References:

    Closes GH-2777

Run Details

10 of 10 new or added lines in 1 file covered. (100.0%)

3957 of 4052 relevant lines covered (97.66%)

6426.52 hits per line