React.js
Angular
Ethical Hacking
Agile
AWS
BlockChain
Cassandra
Cloud
Salesforce
Scaled Agile
TOGAF
DevOps
GIT
Jenkins
Jira
Kibana
Linux
NGINX
Ansible
Artificial Intelligence
in React JS by

How Virtual-DOM is more efficient than Dirty checking?

Click here to read more about DevOps

1 Answer

0 votes
by

In React, each of our components have a state. This state is like an observable. Essentially, React knows when to re-render the scene because it is able to observe when this data changes. Dirty checking is slower than observables because we must poll the data at a regular interval and check all of the values in the data structure recursively. By comparison, setting a value on the state will signal to a listener that some state has changed, so React can simply listen for change events on the state and queue up re-rendering.

The virtual DOM is used for efficient re-rendering of the DOM. This isn’t really related to dirty checking your data. We could re-render using a virtual DOM with or without dirty checking. In fact, the diff algorithm is a dirty checker itself.

Related questions

Madanswer
0 votes
asked Jun 19 in React JS by JackTerrance
0 votes
asked Jul 2, 2019 in React JS by Venkatshastri
...