In Javascript, How to determine if an object property exists and is not empty?

javascript

Solution

`if (errors.hasOwnProperty('error_1') && errors['error_1'] )`

The method `hasOwnProperty` can be used to determine whether an object has the specified property as a direct property of that object.

The `errors[key]` where `key` is a string value checks if the value exists and is not null

to Check if its not empty where it is a string then `typeof errors['error_1'] === 'string' && errors['error_1'].length` where you are checking for the length of a string

Result:

`if (errors.hasOwnProperty('error_1') && typeof errors['error_1'] === 'string' && errors['error_1'].length)`

Now, if you are using a library like underscore you can use a bunch of utility classes like `_.isEmpty` `_.has(obj,key)` and `_.isString()`

Problem

Suppose I have the next javascript object: ``` var errors = { error_1: "Error 1 description", error_2: "Error 2 description", error_3: "", error_4: "Error 4 description" }; ``` How can I determine if the property `error_1` exists in the `errors` object and is not empty as well?

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