Can you please explain the primary distinction between these two identification numbers?

Can you explain the distinction between the following two css ids?

p#id1 { insert code here } and
#id1 p { insert code here }

Answer №1

p#id1 { code goes here } When using this selector, any p tag with the id of "id1" will be targeted.

<p id="id1"></p>

Additionally,

#id1 p { code goes here } This selector is used to target a p tag that is inside an element with the id of "id1".

<div id="id1"> <p> </p> </div> 

Answer №2

  1. p#id1 selects <p id="id1">

  2. #id1 p selects

    <div id="#id1"><p></p></div>
    , the inner p element.

Both selectors are choosing a p element, but different ones:

First: p#id1 selects a p with ID id1 because there is no space between them.

Second: Selects the child p element of ID id1.

See it in action:

p#id1{ color: red;}
#id1 p{ color: green;}
<p id="id1">I have the id id1</p>
<div id="id1"><p>I am a child element</p></div>

Answer №3

When using the selector p#id1, all paragraph tags with the specified ID will be selected on the page, for example <p id="id1">.

On the other hand, when using the selector #id1 p, it will select paragraphs that are child elements of the specified ID, like

<div id="#id1"><p>  </p></div>
.

Answer №4

  1. When you use the selector #id1 p, you are targeting the p elements that are nested inside the element with id #id1.
  2. If you specify p#id1, you are selecting a p tag with the specific id #id1. However, since ids are unique, you can simplify this by writing #id1{ your style } without specifying the tag.

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