Q21. What is web speech API?
Web speech API is used to enable modern browsers recognize and synthesize speech(i.e, voice data into web apps). This API was introduced by W3C Community in the year 2012...
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Q22. What is the purpose of queueMicrotask?
The `queueMicrotask` function is used to schedule a microtask, which is a function that will be executed asynchronously in the microtask queue. The purpose of `queueMicro...
Q23. What is an event table?
Event Table is a data structure that stores and keeps track of all the events which will be executed asynchronously like after some time interval or after the resolution ...
Q24. What is RxJS?
RxJS (Reactive Extensions for JavaScript) is a library for implementing reactive programming using observables that makes it easier to compose asynchronous or callback-ba...
Q25. What is an observable?
An Observable is basically a function that can return a stream of values either synchronously or asynchronously to an observer over time. The consumer can get the value b...
Q26. What is an async function?
An async function is a function declared with the `async` keyword which enables asynchronous, promise-based behavior to be written in a cleaner style by avoiding promise ...
Q27. How do you prevent promises swallowing errors?
While using asynchronous code, JavaScript’s ES6 promises can make your life a lot easier without having callback pyramids and error handling on every second line. But Pro...
Q28. What are the possible side-effects in javascript?
A side effect is the modification of the state through the invocation of a function or expression. These side effects make our function impure by default. Below are some ...
Q29. How to use await outside of async function prior to ES2022?
Prior to ES2022, if you attempted to use an await outside of an async function resulted in a SyntaxError. ```javascript await Promise.resolve(console.log("Hello await"));...
Q30. What are the different ways to execute external scripts?
There are three different ways to execute external scripts, 1. async: The script is downloaded in parallel to parsing the page, and executed as soon as it is available ev...