Q641. How do you disable right click in the web page?
The right click on the page can be disabled by returning false from the `oncontextmenu` attribute on the body element. ```html ```
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Q642. What are wrapper objects?
Primitive Values like string,number and boolean don't have properties and methods but they are temporarily converted or coerced to an object(Wrapper object) when you try ...
Q643. What is AJAX?
AJAX stands for Asynchronous JavaScript and XML and it is a group of related technologies(HTML, CSS, JavaScript, XMLHttpRequest API etc) used to display data asynchronous...
Q644. What are the different ways to deal with Asynchronous Code?
Below are the list of different ways to deal with Asynchronous code. 1. Callbacks 2. Promises 3. Async/await 4. Third-party libraries such as async.js,bluebird etc
Q645. How to cancel a fetch request?
Until a few days back, One shortcoming of native promises is no direct way to cancel a fetch request. But the new `AbortController` from js specification allows you to us...
Q646. 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...
Q647. What is minimum timeout throttling?
Both browser and NodeJS javascript environments throttles with a minimum delay that is greater than 0ms. That means even though setting a delay of 0ms will not happen ins...
Q648. How do you implement zero timeout in modern browsers?
You can't use setTimeout(fn, 0) to execute the code immediately due to minimum delay of greater than 0ms. But you can use window.postMessage() to achieve this behavior.
Q649. What are tasks in event loop?
A task is any javascript code/program which is scheduled to be run by the standard mechanisms such as initially starting to run a program, run an event callback, or an in...
Q650. What is microtask?
A microtask is a type of JavaScript callback that is scheduled to run immediately after the currently executing script and before the next event loop tick. Microtasks are...