Question regarding SELECTOR "naming"

Hello, I’m probably writing this question down incorrectly but will shoot my shot (feel free to correct me). Why is the selector named “header h1” for < header >< h1 >, but the selector for < div class =“divider lg” > is “.lg”?

Is it because < h1> is a descendant HTML element of < header>, the reason why the selector is “header h1”?

But I guess my main confusion is the "divider lg " class selector naming. Why isnt it “.divider lg”?

Please post actual code instead of a picture. Thanks

A dot is placed when the name of the selector is a class.
Otherwise no dot is used.


Hi Jeremy,

Looking for more of a general answer to naming conventions (specifically ‘selectors’ ), but if you really need it, see below.

Also, I’m now on step 37:

Below your .calories-info element, add a div with the class attribute set to divider md .

and noticed that the ‘selector’ for < calories-info> is “.calories-info h1” & “.calories-info span”.

lol i kinda get it but would like confirmation on why its like this

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <title>Nutrition Label</title>
    <link href=",700,800" rel="stylesheet">
    <link href="./styles.css" rel="stylesheet">
    <div class="label">
        <h1 class="bold">Nutrition Facts</h1>
        <div class="divider"></div>
        <p>8 servings per container</p>
        <p class="bold">Serving size <span class="right">2/3 cup (55g)</span></p>
      <div class="divider lg"></div>
      <div class="calories-info">
        <p class="bold sm-text">Amount per serving</p>
        <h1>Calories <span class="right">230</span></h1>
* {
  box-sizing: border-box;

html {
  font-size: 16px;

body {
  font-family: 'Open Sans', sans-serif;

.label {
  border: 2px solid black;
  width: 270px;
  margin: 20px auto;
  padding: 0 7px;

header h1 {
  text-align: center;
  margin: -4px 0;
  letter-spacing: 0.15px

p {
  margin: 0;

.divider {
  border-bottom: 1px solid #888989;
  margin: 2px 0;

.bold {
  font-weight: 800;

.right {
  float: right;

.lg {
  height: 10px;

.lg, .md {
  background-color: black;
  border: 0;

.sm-text {
  font-size: 0.85rem;

.calories-info h1 {
  margin: -5px -2px;
  overflow: hidden;

.calories-info span {
  font-size: 1.2em;
  margin-top: -7px;

ok, so what about the “divider lg”? why was it shortened to .lg?

divider and lg are two different classes.

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Thanks! @ JeremyLT & @ hbar1st

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