Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
What are Async Methods in JavaScript
The async function declaration as the name suggests defines an asynchronous function. This function returns an AsyncFunction object.
Syntax
Here’s the syntax −
async function functionname([param[, param[, ... param]]]) {
statements to be executed
}
Example
Let’ see an example, which prints the result after 5 seconds −
<html>
<body>
<script>
function displayFunction(num) {
return new Promise(resolve => {
setTimeout(() => {
resolve(num);
}, 5000);
});
}
async function add2(num) {
const x = displayFunction(7);
const y = displayFunction(5);
return num * await x * await y;
}
add2(15).then(result => {
document.write("Multiplication Result (after 5 seconds): "+result);
});
</script>
</body>
</html>
Updated on: 2020-06-15T13:18:08+05:30
169 Views
Advertisements