What is descendent selectors?

Question

Can anyone explain descendent selectors in easy way ? And can we write Id and class selectors in the tags like <em>, <span> etc ? And can we write class selector in div tag and inside that in p tag we will write an Id selector ?

Answer 1

We can place id and class to any html element.
Just make sure when you use id, you can have only one id with same name, so for example:
You have div with id="container" you can't place this same id to another element.

About descendent selector, we use space
For example:
div p {
}
Here we select every p what is inside div, even if it is nested in another element

it is similar to child selector:
div > p {

}
Here we select every p what is direct child of div

Also read this:
https://www.w3schools.com/css/css_combinators.asp

Best is to check example:
https://code.sololearn.com/WZoVRFon46G9/?ref=app

Answer 2

Thank to you both I understood 🙏