Every one of them, best first

How to read these figures

The colour says what a bar IS, not how it scores: the accent is the one this page is about, grey is everything it is compared with, and the hollow bar is the web overall — the ruler, not a rival. Whether a figure is above or below the rest of the web is in the number and in the arrow beside it.

Every figure here comes from a sample, not from counting every site — so it carries a margin: how much it could move if we had happened to sample different pages. A figure measured on a thousand pages has a wide margin; one measured on a hundred thousand has a narrow one. It matters for one thing: two figures that differ by less than the wider of their margins are not one above the other, they are tied. That is why nothing here has a position number.

Every technology in this category the census can publish a figure for, including the ones above. A technology is here when it has all four dimensions and enough sample to publish; a technology that belongs to two categories is in both.

TechnologyAWCSMonth by month
Leaflet

Leaflet

Sample
n=2,254
Coverage
94.9%
Margin
±1.12
The web overall
21.0%

Two figures closer together than ±1.12 are tied, not ranked.

Leaflet scores 18.3%18.3%
Leaflet: 5 months, up▲ +3.9
Google Maps

Google Maps

Sample
n=13,714
Coverage
94.8%
Margin
±0.45
The web overall
21.0%

Two figures closer together than ±0.45 are tied, not ranked.

Google Maps scores 13.6%13.6%
Google Maps: 5 months, up▲ +0.5
Mapbox GL JS

Mapbox GL JS

Sample
n=266
Coverage
95.0%
Margin
±3.25
The web overall
21.0%

Two figures closer together than ±3.25 are tied, not ranked.

Mapbox GL JS scores 13.4%13.4%
Mapbox GL JS: 5 months, no significant change= +1.8
Mapbox.js

Mapbox.js

Sample
n=152
Coverage
95.0%
Margin
±4.30
The web overall
21.0%

Two figures closer together than ±4.30 are tied, not ranked.

Mapbox.js scores 11.2%11.2%
Mapbox.js: 5 months, no significant change= −0.8