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Home
Javascript
Conditional Rendering

Conditional Rendering

Conditional rendering with the ternary operator lets you display different content based on a condition in a concise, clean way. It works like: condition? valueIfTrue: valueIfFalse, meaning if the condition is true, one value is shown; otherwise, another value is displayed.

<p className="text-base md:text-xl p-2 lg:p-3">
Your age is:{" "}
              {dob
? (() => {
                    const { years, months } = calculateAge(dob);
                    if (years === 0) return `${months} months`;
                    if (months === 0) return `${years} years`;
                    return `${years} years ${months} months`;
})()
: ""}
</p>

Explanation:

In this code, a ternary operator checks whether dob is selected; if it is, an immediately invoked function runs, calls calculateAge(dob), and returns the formatted age (only months, only years, or both). If dob is not selected, it renders an empty string, so nothing is shown.

Whenever the dob changes, React re-renders the component; the function runs again, and the updated age is displayed inside the <p> (paragraph) tag.

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Conditional Rendering

Contents

Conditional Rendering

Building a Age Calculator App Using ReactJS

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Python Basics Handbook

Javascript Handbook

ReactJS Projects Handbook

Computer Networks Tutorial

Operating System Tutorial

DBMS and SQL Tutorial

Java Tutorial

C Language Tutorial

PHP Tutorial

Android Tutorial

Linux Guide Tutorial

Data Structures and Algorithms Tutorial

Computer Architecture

HTML 5 References Tutorial

Docker Tutorial

GIT (Using Github) Tutorial

Go Language Tutorial

GIT Guide

CSS Tutorial

Advanced Data Structures

Spring Framework Tutorial

Spring Boot Tutorial

Kotlin Tutorial

Apache Cordova Tutorial

Python Tutorial

SASS-SCSS Tutorial

MongoDB Tutorial

Numpy Tutorial

PL-SQL Tutorial

Python Built-in Functions Tutorial

Pandas Tutorial

Elasticsearch Tutorial

Matplotlib Tutorial

Web Scraping Tutorial

Networking with Python

Tkinter Tutorial

Java Programs Tutorial

Java Examples Tutorial

Servlet Tutorial

JSP Tutorial

Java Type Conversion Tutorial

Java 8 Tutorial

Java 9 Tutorial

Java 10 Tutorial

Java 11 Tutorial

Java Util Library Tutorial

Building a Contact Us Form in ReactJS

Movie Recommendation System Project Using Content-Based Filtering

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Student Performance Analysis Project for Beginners Using Data Science

Word Counter Tool Using ReactJS