Q1941. Should I learn ES6 before learning ReactJS?
No, you don’t have to learn es2015/es6 to learn react. But you may find many resources or React ecosystem uses ES6 extensively. Let's see some of the frequently used ES6 ...
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Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (2,728 available).
Q1942. How to trigger watchers on initialization?
You can use `immediate: true` option in order to trigger watchers when the vue instance (or component) is being created. i.e This option will trigger the callback immedia...
Q1943. What Is Inheritance In Python Programming?
Inheritance is an OOP mechanism which allows an object to access its parent class features. It carries forward the base class functionality to the child. Python Interview...
Q1944. What is an error object?
An error object is a built in error object that provides error information when an error occurs. It has two properties: name and message. For example, the below function ...
Q1945. Explain concurrent rendering with an example
Concurrent rendering in React 18 lets React prepare UI updates in a non-blocking way. This means React can pause low-priority rendering work, handle urgent updates first ...
Q1946. What is the purpose of comments option?
When `comments` option enabled, it will preserve and render HTML comments found in templates. By default, it's value is false. Let's see the action in an example, ```java...
Q1947. What Is Composition In Python?
The composition is also a type of inheritance in Python. It intends to inherit from the base class but a little differently, i.e., by using an instance variable of the ba...
Q1948. When do you get a syntax error?
A SyntaxError is thrown if you try to evaluate code with a syntax error. For example, the below missing quote for the function parameter throws a syntax error ```javascri...
Q1949. What is the difference between async mode and concurrent mode?
Both refers the same thing. Previously concurrent Mode being referred to as "Async Mode" by React team. The name has been changed to highlight React’s ability to perform ...
Q1950. How to identify whether code is running on client or server?
You can use `vm.$isServer` method to know whether the current Vue instance is running on the server or client. The usage would be as below, ```javascript const Vue = requ...