Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Explain Strict Comparison in JavaScript switch statement?
The JavaScript switch statement only uses strict comparison (===) and doesn’t converts type if matches are not found using strict comparison and will immediately execute the default statement.
Following is the code for strict comparison in JavaScript switch statement −
Example
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.result {
font-size: 20px;
font-weight: 500;
}
</style>
</head>
<body>
<h1>JavaScript Switch statement strict comparison</h1>
Enter day 1-7<input type="text" class="day" /><button class="Btn">
CHECK
</button>
<div style="color: green;" class="result"></div>
<h3>
Click on the above button to check if switch performs strict comparison or not
</h3>
<script>
let dayVal = document.querySelector(".day");
let resEle = document.querySelector(".result");
document.querySelector(".Btn").addEventListener("click", () => {
switch (dayVal.value) {
case 1:
resEle.innerHTML = "It's monday";
break;
case 2:
resEle.innerHTML = "It's tuesday";
break;
case 3:
resEle.innerHTML = "It's wednesday";
break;
case 4:
resEle.innerHTML = "It's thursday";
break;
case 5:
resEle.innerHTML = "It's friday";
break;
case 6:
resEle.innerHTML = "It's saturday";
break;
case 7:
resEle.innerHTML = "It's sunday";
break;
default:
resEle.innerHTML = "Enter a value between 1 - 7";
break;
}
});
</script>
</body>
</html>Output
The above code will produce the following output −
On entering a number and clicking “CHECK” the default statement would be called every time due to switch always performing strict comparison −
Updated on: 15-Jul-2020
319 Views
Advertisements