ReactJS - Change CSS Class Properties

Question

How can we dynamically change the properties of a CSS Class in ReactJS. For example, I have several text fields with CSS Classname "important". I want to change all of them to have flash a red background on click of a button.

I thought I could do this by changing the properties of that CSS Class. How do I alter this class so that all its the text fields with that class will change in a flash.

Or is there another more elegant way of doing this?

Generally a better approach is to add/remove modifier classes, rather than changing the CSS dynamically. (And avoiding !important where ever possible is also a good goal) — DBS
– DBS, Commented May 17, 2022 at 9:59
@DBS Thanks, But how do I modify all those text fields at a time? Is there a way to query / select several elements for update? — Vikas
– Vikas, Commented May 17, 2022 at 10:00
If you add the code for the relevant component to the question we might be able to answer in more detail. But passing in an extra class to multiple input components shouldn't be too difficult, e.g. using a template string — DBS
– DBS, Commented May 17, 2022 at 10:03

agulowaty · Accepted Answer · 2022-05-17 10:01:05Z

1

In your render() method, use a state variable to attach different classes to the rendered element depending on its state.

answered May 17, 2022 at 10:01

agulowaty

2111 silver badge8 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Vikas Over a year ago

O! Why didn't I think of that! Thanks.

agulowaty Over a year ago

No probs. In case you've missed this nice tutorial: reactjs.org/docs/thinking-in-react.html ;)

StudioTime · Accepted Answer · 2022-05-17 11:13:46Z

0

You can do something like conditionally passing classes in your className={""} prop.

If state changes class name will be changed also.

It will look something like this:

className={state ? "important" : "yourDesiredClass"}

edited May 17, 2022 at 11:13

StudioTime

24.4k40 gold badges129 silver badges217 bronze badges

answered May 17, 2022 at 10:07

Atakhan Zhumadil

12 bronze badges

Collectives™ on Stack Overflow

ReactJS - Change CSS Class Properties

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related