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Loading indicator

A loading indicator is a user-interface element that signals an ongoing operation, such as loading, initialization, or data retrieval.

How 2 Manning books explain it

Tiny CSS Projects

A loading indicator is a visual or textual interface signal that an operation is in progress or awaiting completion.

How it is used
Uses visual motion, progress feedback, and explanatory text to reassure users during operations that take longer than one second.
How deep it goes
Explains implementation from HTML scaffolding through SVG geometry, responsive sizing, progress styling, and CSS animation timing.
Examples
Demonstrates eleven animated SVG rectangles, a “Scanning channels” message, and a progress bar set to 32 of 100.
What you can do after
Build a responsive animated loader with SVG bars, accessible status text, a progress element, and tunable CSS animation.

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Design for Developers

A loading animation is a visual indicator that communicates ongoing processing or waiting in an interactive interface.

How it is used
Communicates system status while pages, forms, uploads, downloads, or other operations remain incomplete.
How deep it goes
Explains when to use animations, skeleton content, or progress bars, but stops short of implementation details.
Examples
Uses blank pages, submitted order forms, skeleton content, progress bars, and a website-scanner waiting queue.
What you can do after
Apply loading feedback to reduce uncertainty during delayed page loads, form submissions, and longer-running operations.

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Related concepts

These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.