Which we can use in place of the defective typeof operator. We can correct this by defining our own typeOf function, That isn't totally wrong since arrays in JavaScript inherit from objects,īut it isn't very useful. Typeof produces 'object' instead of 'array'.

Operator to facilitate this, but typeof has problems. In strongly typed languages as well.) JavaScript provides a typeof To examine a value to determine its type. Since JavaScript is a loosely-typed language, it is sometimes necessary Were frantically adding features to their browsers, sometimes imitatingĮach other, sometimes planting proprietary hooks, sometimes incorrectlyĪnticipating a future ECMAScript Language Specification. JavaScript is most used in web applications, and there is still an incompatibility Fortunately, JavaScript is such an expressive language that we can easily fix the omissions locally. There are functions that I feel should have been in the Standard and required in every implementation. Some feature omissions can be corrected by adding new functions and basic methods to our standard programming toolkit. Helpful in keeping us clear of some of the sharp edges. Some of the problems we can easily avoid by not using misfeatures like As a result, it still has some rough spots. There was no time during its development to polish Rushed to market and then instantly had a huge user base and, soon after, aįormal international standard. Programming Language suffers from premature standardization.

Douglas crockford javascript