Q21. When component needs a single root element?
In VueJS 2.x, every component must have a single root element **when template has more than one element**. In this case, you need to wrap the elements with a parent eleme...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (138 available).
Active:
Tag: components ×
Q22. What is the use of `react-dom` package?
The `react-dom` package provides _DOM-specific methods_ that can be used at the top level of your app. Most of the components are not required to use this module. Some of...
Q23. What is ReactDOMServer?
The `ReactDOMServer` object enables you to render components to static markup (typically used on node server). This object is mainly used for _server-side rendering_ (SSR...
Q24. How do you implement model on custom input components?
The custom events can also be used to create custom inputs that work with v-model. The `` inside the component must follow below rules, 1. Bind the value attribute to a v...
Q25. What is global registration in components?
The components which are globally registered can be used in the template of any root Vue instance (new Vue) created after registration. In the global registration, the co...
Q26. How do you conditionally render components?
In some cases you want to render different components depending on some state. JSX does not render `false` or `undefined`, so you can use conditional _short-circuiting_ t...
Q27. How do you memoize a component?
There are memoize libraries available which can be used on function components. For example `moize` library can memoize the component in another component. ```jsx harmony...
Q28. How do you customize model directive for a component?
The v-model directive on a component uses **value** as the prop and **input** as the event, but some input types such as `checkboxes` and `radio buttons` may need to use ...
Q29. Do Hooks replace render props and higher order components?
Both render props and higher-order components render only a single child but in most of the cases Hooks are a simpler way to serve this by reducing nesting in your tree.
Q30. What is a switching component?
A _switching component_ is a component that renders one of many components. We need to use object to map prop values to components. For example, a switching component to ...