HTML Comments

Concise comments should be single-lined, such as:

Multi-line comments should be formatted as follows:

Long comments are more readable when they are indented with two spaces for clarity.

Using Style Sheets

Simplify linking to style sheets by omitting the type attribute.

Short CSS rules can be compressed for brevity, like so:

For lengthy CSS rules, it’s advisable to spread them across multiple lines:

Ensure consistency in CSS formatting:

• Begin each rule with the opening bracket on the same line as the selector, preceded by a single space.
• Indent the properties and values with two spaces.
• Conclude each property-value pair with a semicolon, even the last one.
• Use quotes around values only when necessary, such as when they contain spaces.
• Conclude each rule with the closing bracket on a new line, without leading spaces.

Loading JavaScript in HTML

Simplify the syntax for loading external scripts by omitting the type attribute.

Accessing HTML Elements with JavaScript

Employing messy HTML code may lead to JavaScript errors.

These two JavaScript statements yield distinct outcomes:

Example