This blog explains how to check if all object properties are null using JavaScript.
How to Check if All Object Properties are Null Using JavaScript?
To check if all the object properties are null in JavaScript, invoke the “Object.values()” method in your program. The Object.values() method takes an object and returns its own enumerable property’s values in the form of an array. This method can be applied to accept an object as a parameter and check if each of its included properties holds a value “null”.
Syntax
In the above syntax:
- “obj” refers to the object whose property values will be returned.
Example 1: Check If All Object Properties are Null
Let’s overview the below-stated example:
let object = {x: null,y: null};
let objProp = Object.values(object).every(value => {
if (value === null) {
return true;
}
return false;
});
console.log(objProp);
</script>
According to the above code snippet:
- Create an object named “object” having the stated properties.
- In the next step, apply the “Object.values()” method, taking the created object as an argument.
- After that, the “every()” method will be applied to check for each object value through iteration.
- If all the values are equal to “null”, a boolean value “true” will be displayed.
- In the other case, “false” will be displayed on the console.
Output
From the above output, it is proved that all the object properties hold “null” values.
Example 2: Check If Object Properties are Null, Undefined, or False
This example will check for multiple values within the object and return the corresponding result:
let object = {x: null, y: undefined, z: false};
let objProp = Object.values(object).every(value => {
if (value === null || value === undefined || value === false) {
return true;
}
return false;
});
console.log(objProp);
</script>
Perform the following steps as given in the above lines of code:
- Likewise, create an object named “object” having the stated properties and assigned values.
- After that, similarly, apply the “Object.values()” method such that the created object is checked for each of the specified values against a property in the stated condition with the help of the “OR(||)” operator.
- In the case of a value being “null”, “undefined”, or “false”, a boolean value “true” will be returned.
- In the other scenario, the value “false” will be displayed.
Output
In the above output, it can be observed that the added conditions are evaluated as true, so, the boolean value “true” is returned.
Conclusion
The “Object.values()” method can be implemented to check if all the object properties are null, undefined, or false in JavaScript. The discussed first example verifies if all the values of the object properties are null. Whereas the other example applies a condition to check for various values against the corresponding object properties. This tutorial explained to check whether all the properties in an object are null in JavaScript.
