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What are JavaScript symbols?
The symbol data type is a primitive data type. They were introduced in ES6 and are completely unique and created using the Symbol() factory function which returns the Symbol.
Following is the code for JavaScript symbols −
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: 18;
color: blueviolet;
font-weight: 500;
}
</style>
</head>
<body>
<h1>JavaScript symbols</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to display and compare symbols</h3>
<script>
let BtnEle = document.querySelector(".Btn");
let resEle = document.querySelector(".result");
let sym1 = Symbol("test");
let sym2 = Symbol("test");
BtnEle.addEventListener("click", () => {
console.log(sym1);
console.log(sym2);
if (sym1 !== sym2) {
resEle.innerHTML = "The symbols are not equal";
}
});
</script>
</body>
</html>Output
On clicking the ‘CLICK HERE’ button and inspecting the output in console −
Updated on 16-Jul-2020 12:51:05
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