Learn how to check if an input field is empty in React using different methods, such as empty string validation, react hook form, and JavaScript. This tutorial will show you how to handle empty field validation in React JS with examples
In JavaScript, you can check for an empty string using various methods. An empty string is a string that contains no characters, not even whitespace. Using the Length Property You can use the .length property of a string to determine its length. An empty string will have a length of 0....
Here's a Code Recipe to check if an object is empty or not. For newer browsers, you can use plain vanilla JS and use the new "Object.keys" 🍦 But for older browser support, you can install the Lodash library and use their "isEmpty" method 🤖 ...
The-zoperator returnstrueif a string variable is null or empty. How the use the-zBash Operator Afterdeclaring a string variable, use the-zoperator in anif statementto check whether a string is empty or not: MY_STRING="" if [ -z $MYSTRING ] then echo "String is empty" else echo "...
string value: This is a non-empty string [ERROR] string is empty! Use Custom Defined Function With size to Check if String Is Empty in C++The previous method could be implemented by the user-defined function that takes a single string argument and checks if it is empty. This function ...
console.log(isEmptyObject({}));// output: true 12 console.log(isEmptyObject({"foo":"1"}));// output: false In the above example, we’ve built a custom function which you can call to check if an object is empty. It takes a single argument, and you need to pass an object which...
JavaScript offers many ways to check if a string contains a substring. Learn the canonical way, and also find out all the options you have, using plain JavaScriptTHE SOLOPRENEUR MASTERCLASS Launching June 24th Checking if a string contains a substring is one of the most common tasks in any...
Media queries was introduced in CSS3, and is one of the key ingredients for responsive web design. Media queries are used to determine the width and height of a viewport to make web pages look good on all devices (desktops, laptops, tablets, phones, etc). ...
What is a null check? In JavaScript, null represents an intentional absence of a value, indicating that a variable has been declared with a null value on purpose. On the other hand, undefined represents the absence of any object value that is unintentional. A null check determines whether a...
Field in Navbar Login Form in Navbar Custom Checkbox/Radio Custom Select Toggle Switch Check Checkbox Detect Caps Lock Trigger Button on Enter Password Validation Toggle Password Visibility Multiple Step Form Autocomplete Turn off autocomplete Turn off spellcheck File Upload Button Empty Input Validation...