vue js interview questions and Answers
Whether you are a multiyear experienced VUE JS developer or a fresher with the wish to reach new milestones of success in this niche, going through this expert advice content consisting vital VUE JS interview questions with answers, and other practice-oriented details can be extremely helpful. VUE JS is an open source and progressive JavaScript framework for building advanced user interfaces. It is designed to be incrementally adoptable. The core library of VUE JS is based on the view layer only and easy to integrate with existing projects and other libraries.
Most Frequently Asked vue js interview questions
VUE JS is a modern JavaScript Framework with the capability of building various web interfaces. Ranked among top web development tools, it uses virtual DOM for optimal performance and faster workability. It is also reactive and declarative rendering, which allows developers to create automatically updatable visual elements based on data or state changes.
Filters are functionality provided by VUE JS components that let users apply transformations and formatting to any part of template dynamic data. Filters don’t change component data or any other aspect, but they do affect the output.
Launched in 2018, VUE JS 2 has introduced a number of excellent features. Here are five best of them:
- Support for iterable object protocol with v-for
- Support multi-root templates
- No distinction between scoped vs. non-scoped slots
- Introduction of dynamic directive arguments
- Code frame in compiler warning messages
- Pre-fetching of data during server-side rendering
- ES module build intended for direct in-browser usage
In VUE JS, components independent, single units present in an interface. VUE components have their own markup, state, and style. These can be used to extend basic HTML elements to fully encapsulate the reusable code. VUE JS components are custom elements that compilers would attach to specified behaviors.
$emit in VUE JS is primarily purposed to send custom events between child components to parent components (upwards). This allows users to trigger a function in the parent component. Only API docs will only be required here.
To use raw HTML in a VUE JS template, users have to implement the v-HTML. We have to pass a reference to an HTML string in the data model to v-HTML present in component template.
Now, the raw HTML will be rendered into the component. Update the legacySystemHTML property and the HTML will update according to it.
Find high-quality VUE JS interview question and answers here for guaranteed career success.
<template>
<div v-html="legacySystemHTML"> </div>
</template>
<script> export default {
data() {
return {
// Just like JSX! Oh wait...
legacySystemHTML
<FONT color="#faddad" size="-2">
<MARQUEE>Please enter your name to continue.</MARQUEE>
... </FONT>
}
}
}
</script>
The absence of pedigree is probably the greatest benefit of using VUE JS rather than Angular JS. VUE JS is also extremely lightweight, user-friendly, and easy to learn. If your requirement is a single page and lightweight web application, then no doubt VUE JS is the best choice. Speed and performance will also be considered in favor of VUE JS when compare to Angular.
Here are the reasons to choose VUE JS over other front-end frameworks.
- Excellent learning curve
- Quality architecture and performance due to the presence of Virtual DOM
- Fastest growing development ecosystem and versatility
- Cross-platform mobile UI development
- Offers proprietary reactivity mechanism that automatically refreshes the user interface
- Impeccable UX production and high performance
- Increased productivity due to the use of HTML-based templates
- Blooming and active community
Developers can use router.push({ name: "yourroutename"}) or router.push("yourroutename") to redirect to another page or any particular route in VUE JS.
To create an instance of VUE JS, we have to use the below-mentioned function.
var vm = new Vue({
// options
})
Development History
Developed by former Google employee Evan You, VUE JS was initially released in February 2014. With continuous improvement and feature addition over the year, VUE JS is currently operating its version 2.6 released in Feb 2019 with the title of Macross.
Let’s further continue to discuss a set of most interviewer-preferred VUE JS interview questions with answers for your acknowledgment and practice. For your confirmation, these questions are handpicked by niche experts and accompanied here with their best-suggested answers.
Advantages:
- Extremely small in size (18–21KB), so easy to download and use it instantaneously. It’s small in size that doesn’t mean you have to compromise with speed. In fact, it beats most of the bulky frameworks such as Angular, Reacts and Ember.
- User-friendly, easy to understand, and develop apps.
- It facilitates developers to integrate with the existing applications built on JavaScript. This is possible because of the availability of components in VUE JS for everything.
- VUE JS offer comprehensive documentation, which is even easily understandable to users with very little knowledge of HTML and JavaScript.
- Because of MVVM architecture, VUE JS facilitates two-way communications, which makes HTML block handling easier.
- Users can write their own template in JavaScript and HTML file using virtual nodes.