When comparing Validator pro vs JSHint, the Slant community recommends JSHint for most people. In the question“What are the best JavaScript linting tools?” JSHint is ranked 2nd while Validator pro is ranked 4th. The most important reason people chose JSHint is:
Since it's creation, JSHint was created to be a more configurable version of JSLint (it's actually a fork of JSLint itself). Every rule is configurable through a configuration file.
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Pros
Pro Validates files connected to website
Pro Customizable ruleset
Since it's creation, JSHint was created to be a more configurable version of JSLint (it's actually a fork of JSLint itself). Every rule is configurable through a configuration file.
Pro Comes with support for many librariers
JSHint supports libraries like QUnit, NodeJS, jQuery, Mocha out of the box.
Pro Basic ES6 support
Basic ES6 support is included.
Cons
Con No way to support ESnext
There's no support for ESnext available.
Con Difficult to know which rule is causing an error
Because it does not display the rule name that is being broken, it's difficult to know which rule is actually causing the error.