CLS

Abbreviation with 2 meanings

CLS
Stands forCumulative Layout Shift
Meanings2
CategoriesTechnology & Computing, Military

CLS has two meanings. It stands for Cumulative Layout Shift (Internet & web) or Combat lifesaver (military term).

Meanings of CLS at a glance

#CLS stands forContext
1Cumulative Layout ShiftTechnology & Computing › Internet & Web
2Combat lifesaverMilitary › Military Term

1. Cumulative Layout Shift

Technology & Computing · Internet & Web Abbreviations

A Core Web Vitals metric that scores how much visible content unexpectedly moves while a page loads, such as text jumping when an ad or image appears above it. A score of 0.1 or less counts as good.

Example: Reserving space for the banner ad brought CLS down from 0.32 to 0.04.

Unlike the other vitals, CLS is a unitless score rather than a time. Its calculation changed in 2021 to measure the worst burst, or session window, of shifts instead of the total across a page's whole life. Setting width and height on images and reserving space for embeds are the standard fixes.

2. Combat lifesaver

Military · Military Term Abbreviations

Non-medical soldier trained in advanced first aid, such as applying tourniquets, treating chest wounds and starting care for casualties, as a bridge until a medic arrives. Each squad aims to have at least one.

Example: The CLS applied a tourniquet and packed the wound before the medic arrived.

Combat lifesavers carry an expanded aid bag. The program dates from the 1980s and became more important in Iraq and Afghanistan. In computing, CLS means clear screen, and in web performance it means cumulative layout shift.

More Internet & web abbreviations

  • BEM – Block Element Modifier
  • ccTLD – Country code top-level domain
  • CDN – Content delivery network
  • CGI – Common Gateway Interface
  • CMS – Content management system
  • CORS – Cross-Origin Resource Sharing
  • CSP – Content Security Policy
  • CSR – Client-side rendering

See all 76 Internet & web abbreviations →

More military term abbreviations

  • CBRN – Chemical, biological, radiological and nuclear
  • CG – Commanding general
  • CIC – Combat information center
  • CINC – Commander in chief
  • CO – Commanding officer
  • COA – Course of action
  • COB – Chief of the boat
  • COCOM – Combatant command (command authority)

See all 248 military term abbreviations →

Edited by the AbbreviationList.com team. Spotted an error or a missing meaning? Contact us.