How to use react state in querySelector

Question

Instead of doing this: document.querySelector(".class1").addEventListener('wheel', this.doSomething)

I want to do something like this: document.querySelector(this.state.currentClass).addEventListener('wheel', this.doSomething)

Is it possible? The other workaround I can think of is like this:

let temp = "." + this.state.currentClass;
document.querySelector(temp).addEventListener('wheel', this.doSomething);

Is there a standard or more optimal way of doing this?

Red Baron · Accepted Answer · 2020-06-11 15:53:20Z

2

you could use string interpolation and just do:

document.querySelector(`.${this.state.currentClass}`)

string interpolation works like this:

anything in the string is interpreted as a string EXCEPT anything in ${} is read as javascript and converted to a string

const hello = 'goodbye' e.g. hello{hello} // returns hellogoodbye

I would recommend doing it the way I've shown and anytime you want to append something, just update the className in state

edited Jun 11, 2020 at 15:53

answered Jun 11, 2020 at 15:45

Red Baron

7,75312 gold badges48 silver badges115 bronze badges

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

2 Comments

searchingSO Over a year ago

What if I have to append something to it? Actually my className is numerical so I need to append a string to it. Like from 0 I want to make it .0class for querySelector()

Red Baron Over a year ago

@AkhileshSingla I have updated, let me know if you still need help

Collectives™ on Stack Overflow

How to use react state in querySelector

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related