Style sheets are minified.

Minification consists of reducing as much as possible a volume of data and therefore the weight of the carrying file by removing elements that the reading machine can do without (typically: spaces, line breaks and comments). CSS style sheets can be minified.

Objectives

• Minimize the amount of data to download
• Improve performance
• Reduce the energy impact linked to consulting the digital book

Implementation

• Remove unnecessary spaces and comments in CSS files using dedicated tools.

Control

• Manually check within all CSS files that no line returns, comments, indentations or line breaks are present.
• Or identify the list of non-minified CSS files using development tools (browsers , online tools, etc.)

Validation

• Needs to be human verified.