Checks whether the target object has own property with the given key.
target
key
This is a safer variant of target.hasOwnProperty(key) call.
target.hasOwnProperty(key)
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty
Target object to check.
A key of the property to check.
true if target object has own property with the given key, or false otherwise.
true
false
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Checks whether the
targetobject has own property with the givenkey.This is a safer variant of
target.hasOwnProperty(key)call.See
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty