Explain import “as” and Export “as” constructs in JavaScript.

Javascript Web Development Object Oriented Programming

Import as allows us to import a named module under different name.

Export as allows us to export a named module under different name.

Following is the code for import as and export as construct in Javascript −

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: 18px;
      font-weight: 500;
      color: rebeccapurple;
   }
</style>
</head>
<body>
<h1>Import as and Export as in JavaScript</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to execute the imported function</h3>
<script src="script.js" type="module"></script>
</body>
</html>

script.js

import {test,tellTime as showTime} from "./sample.js";
let resultEle = document.querySelector('.result');
document.querySelector('.Btn').addEventListener('click',()=>{
   resultEle.innerHTML+=test();
   resultEle.innerHTML+=showTime();
})

sample.js

function testImport() {
   return "Module testImport has been imported" + "";
}
function tellTime() {
   return new Date();
}
export { testImport as test, tellTime };

Output

The above code will produce the following output −

On clicking the ‘CLICK HERE’ button −

AmitDiwan

Published on 17-Jul-2020 07:30:40

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