you can redeclare undefined using scope wrappers: (function($, undefined){ /* undefined is 'abc' in here */ })(jQuery, 'abc'); , which is why ppl complain that ... ... <看更多>
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you can redeclare undefined using scope wrappers: (function($, undefined){ /* undefined is 'abc' in here */ })(jQuery, 'abc'); , which is why ppl complain that ... ... <看更多>
... <看更多>
How to check if a property exists in an object in JavaScript by using the hasOwnProperty() method, the in operator, and comparing with undefined. ... <看更多>
_onImmediate (test.js:6:19) 2) test Uncaught error outside test suite: Uncaught TypeError: Cannot read property 'currentRetry' of undefined ... ... <看更多>