What does space mean in css

In CSS, spaces are used to separate selectors, properties, and values, and can be spaces or tabs. The uses of spaces include: 1) separating selectors; 2) separating attributes and values; 3) aligning styles; 4) selecting descendant elements. Note: Do not abuse spaces, keep the spaces before and after, and avoid using tabs.

The meaning of spaces in CSS

In CSS, spaces are used to separate selectors, properties, and values. It can be an actual space character ( ) or a tab character (\t).

Purposes of spaces

Spaces have the following uses in CSS:

• Separate selectors: Spaces separate different CSS selectors, for example:

<code class="css">body {
  font-family: Arial;
}
h1 {
  color: red;
}</code>

• Separate attributes and values: Spaces separate attributes and values ​​in CSS declarations, for example:

<code class="css">background-color: #ccc;
font-size: 1.2em;</code>

• Alignment style: Spaces can be used to align CSS declarations to make them easier to read, for example:

<code class="css">body {
  margin: 0;
  padding: 10px;
  font-family: Arial;
}</code>

• Select descendant elements: When using nested selectors, spaces indicate descendant element relationships, for example:

<code class="css">ul li {
  list-style-position: inside;
}</code>

Notes on spaces

In When using spaces, you need to pay attention to the following points:

• Don’t abuse spaces: Excessive spaces can make CSS code difficult to read and understand.
• Consistent spaces before and after: Use consistent spaces before and after selectors and declarations, for example:

<code class="css">body { font-family: Arial; }</code>

• Avoid using tabs : Tab characters may appear differently in different editors and browsers, and are not recommended for use in CSS.

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