How to check if every properties in an object are null

When using Lodash to check if each property in an object is null, a common and efficient approach is to use the _.every function. This function allows you to iterate over each property of the object and apply a test function. If all properties satisfy the condition defined by the test function, it returns true; otherwise, it returns false.

Below is a specific example of using Lodash to check if each property in an object is null:

javascript
import _ from 'lodash';

const obj = {
  a: null,
  b: null,
  c: 10
};

// Using _.every and _.isNull to detect property values
const areAllNull = _.every(obj, _.isNull);

console.log(areAllNull); // This outputs false because the value of property c is 10, not null

In the above code snippet, _.every(obj, _.isNull) iterates over each property of the object obj and checks if the value of each property is null. _.isNull is a function that checks if a value is strictly equal to null. In our example, since the value of property c is 10 (not null), areAllNull evaluates to false.

If you want the function to return true only when all properties are null, all properties must satisfy the condition defined by _.isNull. If any property has a value that is not null, _.every will return false immediately.