keys(value).length === 0 && value.constructor === Object; value = null; // null value = undefined; // undefined Perfect, no error is thrown 😁# B. Empty Object Check in Older BrowsersWhat if you need to support older browsers? Heck, who am I kidding! We all know when I say...
Check if Array is Empty: There are many ways to do this: By directly printing the value returned by length property Using an if condition Using the logical NOT operator Let's see code examples for all these different ways. 1. Print Array Element Count: If we have an array referenced...
Check if value is empty in JavaScript How to check if a value is object-like in JavaScript? Check if a value is in LinkedList in C# Check if a string is sorted in JavaScript How to check if the value is primitive or not in JavaScript? Check if a Value is Infinity or NaN in Python...
Let’s jump right in. How to Check If an Object Is Empty in JavaScript Use Object.keys Loop Over Object Properties With for…in Use JSON.stringify Use jQuery Use Underscore and Lodash Libraries 1. Use Object.keys Object.keys will return an array, which contains the property names of the ...
trim() === ''){ document.write('String is empty'); } Following is the output of the above program −String is empty So, we have seen how to check the empty string in JavaScript using the length property and trim() method. Print Page Previous Next ...
console.log(isEmptyObject(bar));// output: false As you can see in the above example, thebarobject has thefooproperty attached to it, and thus thebar.keys(obj).lengthexpression would return a value greater than zero. So theisEmptyObjectfunction would returnfalsein this case. ...
To check if a JavaScript array is empty or not, you can make either of the following checks (depending on your use case): const empty = !Array.isArray(array) || !array.length; const notEmpty = Array.isArray(array
For JavaScript objects, there is no built-in .length or .isEmpty method available to check if they are empty. Here are 4 different methods that you can use to make sure that a given object does not have its own properties: Object.entries() Method The Object.entries() method takes an ...
Declare an empty object. Iterate over the array using a for loop. In every iteration, add a new entry in the object created in step 1 with the array element as key and with some fixed value. Check for the presence of an entry in the object with the current array element as the key...
Return Value Unlike the array search functions we have seen so far, the.filter()returns an array containing the elements satisfying the conditions mentioned in the arrow function. If element is found, the returned array will contain the required elements, else an empty array will be returned by...