2026年

2026年に主要ブラウザで使えるようになったCSSプロパティの年間まとめ。

anchor-name

property
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

anchor-scope

property
MDN Document
Browser Support

  • Chrome

    v131+
    2024-11-12

  • Edge

    v131+
    2024-11-14

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

position-area

property
MDN Document
Browser Support

  • Chrome

    v129+
    2024-09-17
    フォールバック
    v125 - v131
    inset-area

  • Edge

    v129+
    2024-09-19
    フォールバック
    v125 - v131
    inset-area

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

position-try

property
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

position-try-fallbacks

property
MDN Document
Browser Support

  • Chrome

    v128+
    2024-08-20
    フォールバック
    v125 - v128
    position-try-options

  • Edge

    v128+
    2024-08-22
    フォールバック
    v125 - v128
    position-try-options

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

position-visibility

property
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v26.2+
    2025-12-12

  • Safari (iOS)

    v26.2+
    2025-12-12

  • Firefox

    v147+
    2026-01-13

position-try

at-rule
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

active-view-transition-type

selector
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v18.2+
    2024-12-11

  • Safari (iOS)

    v18.2+
    2024-12-11

  • Firefox

    v147+
    2026-01-13

anchor

type
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

anchor-size

type
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v147+
    2026-01-13

position-try-order

property
MDN Document
Browser Support

  • Chrome

    v125+
    2024-05-14

  • Edge

    v125+
    2024-05-17

  • Safari

    v26+
    2025-09-15

  • Safari (iOS)

    v26+
    2025-09-15

  • Firefox

    v148+
    2026-02-24

alignment-baseline

property
MDN Document
Browser Support

  • Chrome

    v1+
    2008-12-11

  • Edge

    v79+
    2020-01-15

  • Safari

    v5.1+
    2011-07-20

  • Safari (iOS)

    v5+
    2011-10-12

  • Firefox

    v149+
    2026-03-24

baseline-shift

property
MDN Document
Browser Support

  • Chrome

    v1+
    2008-12-11

  • Edge

    v79+
    2020-01-15

  • Safari

    v4+
    2009-06-08

  • Safari (iOS)

    v3.2+
    2010-04-03

  • Firefox

    v149+
    2026-03-24

math-depth

property
MDN Document
Browser Support

  • Chrome

    v109+
    2023-01-10

  • Edge

    v109+
    2023-01-12

  • Safari

    v26.4+
    2026-03-24

  • Safari (iOS)

    v26.4+
    2026-03-24

  • Firefox

    v117+
    2023-08-29

scope

at-rule
MDN Document
Browser Support

  • Chrome

    v118+
    2023-10-10

  • Edge

    v118+
    2023-10-13

  • Safari

    v26.4+
    2026-03-24

  • Safari (iOS)

    v26.4+
    2026-03-24

  • Firefox

    v146+
    2025-12-09

highlight

selector
MDN Document
Browser Support

  • Chrome

    v105+
    2022-09-02

  • Edge

    v105+
    2022-09-01

  • Safari

    v17.2+
    2023-12-11

  • Safari (iOS)

    v17.2+
    2023-12-11

  • Firefox

    v149+
    2026-03-24

overscroll-behavior

property
MDN Document
Browser Support

  • Chrome

    v144+
    2026-01-13

  • Edge

    v18+
    2018-10-02

  • Safari

    v16+
    2022-09-12

  • Safari (iOS)

    v16+
    2022-09-12

  • Firefox

    v150+
    2026-04-21

overscroll-behavior-block

property
MDN Document
Browser Support

  • Chrome

    v144+
    2026-01-13

  • Edge

    v144+
    2026-01-21

  • Safari

    v16+
    2022-09-12

  • Safari (iOS)

    v16+
    2022-09-12

  • Firefox

    v150+
    2026-04-21

overscroll-behavior-inline

property
MDN Document
Browser Support

  • Chrome

    v144+
    2026-01-13

  • Edge

    v144+
    2026-01-21

  • Safari

    v16+
    2022-09-12

  • Safari (iOS)

    v16+
    2022-09-12

  • Firefox

    v150+
    2026-04-21

overscroll-behavior-x

property
MDN Document
Browser Support

  • Chrome

    v144+
    2026-01-13

  • Edge

    v18+
    2018-10-02

  • Safari

    v16+
    2022-09-12

  • Safari (iOS)

    v16+
    2022-09-12

  • Firefox

    v150+
    2026-04-21

overscroll-behavior-y

property
MDN Document
Browser Support

  • Chrome

    v144+
    2026-01-13

  • Edge

    v18+
    2018-10-02

  • Safari

    v16+
    2022-09-12

  • Safari (iOS)

    v16+
    2022-09-12

  • Firefox

    v150+
    2026-04-21

open

selector
MDN Document
Browser Support

  • Chrome

    v133+
    2025-02-04

  • Edge

    v133+
    2025-02-06

  • Safari

    v26.5+
    2026-05-11

  • Safari (iOS)

    v26.5+
    2026-05-11

  • Firefox

    v136+
    2025-03-04

field-sizing

property
MDN Document
Browser Support

  • Chrome

    v123+
    2024-03-19

  • Edge

    v123+
    2024-03-22

  • Safari

    v26.2+
    2025-12-12

  • Safari (iOS)

    v26.2+
    2025-12-12

  • Firefox

    v152+
    2026-06-16

-webkit-scrollbar

selector
MDN Document
Browser Support

  • Chrome

    v2+
    2009-05-21

  • Edge

    v79+
    2020-01-15

  • Safari

    v4+
    2009-06-08

  • Safari (iOS)

    v3+
    2009-06-17

  • Firefox

    v153+
    2026-07-21

picture-in-picture

selector
MDN Document
Browser Support

  • Chrome

    v110+
    2023-02-07

  • Edge

    v110+
    2023-02-09

  • Safari

    v13.1+
    2020-03-24

  • Safari (iOS)

    v13.4+
    2020-03-24

  • Firefox

    v153+
    2026-07-21

text-box

property
MDN Document
Browser Support

  • Chrome

    v133+
    2025-02-04

  • Edge

    v133+
    2025-02-06

  • Safari

    v18.2+
    2024-12-11

  • Safari (iOS)

    v18.2+
    2024-12-11

  • Firefox

    v154+
    2026-08-18

text-box-edge

property
MDN Document
Browser Support

  • Chrome

    v133+
    2025-02-04

  • Edge

    v133+
    2025-02-06

  • Safari

    v18.2+
    2024-12-11

  • Safari (iOS)

    v18.2+
    2024-12-11

  • Firefox

    v154+
    2026-08-18

text-box-trim

property
MDN Document
Browser Support

  • Chrome

    v133+
    2025-02-04

  • Edge

    v133+
    2025-02-06

  • Safari

    v18.2+
    2024-12-11

  • Safari (iOS)

    v18.2+
    2024-12-11

  • Firefox

    v154+
    2026-08-18

buffering

selector
MDN Document
Browser Support

  • Chrome

    v152+
    2026-08-25

  • Edge

    v152+
    2026-08-28

  • Safari

    v15.4+
    2022-03-14

  • Safari (iOS)

    v15.4+
    2022-03-14

  • Firefox

    v150+
    2026-04-21

muted

selector
MDN Document
Browser Support

  • Chrome

    v152+
    2026-08-25

  • Edge

    v152+
    2026-08-28

  • Safari

    v15.4+
    2022-03-14

  • Safari (iOS)

    v15.4+
    2022-03-14

  • Firefox

    v150+
    2026-04-21

paused

selector
MDN Document
Browser Support

  • Chrome

    v152+
    2026-08-25

  • Edge

    v152+
    2026-08-28

  • Safari

    v15.4+
    2022-03-14

  • Safari (iOS)

    v15.4+
    2022-03-14

  • Firefox

    v150+
    2026-04-21

playing

selector
MDN Document
Browser Support

  • Chrome

    v152+
    2026-08-25

  • Edge

    v152+
    2026-08-28

  • Safari

    v15.4+
    2022-03-14

  • Safari (iOS)

    v15.4+
    2022-03-14

  • Firefox

    v150+
    2026-04-21

seeking

selector
MDN Document
Browser Support

  • Chrome

    v152+
    2026-08-25

  • Edge

    v152+
    2026-08-28

  • Safari

    v15.4+
    2022-03-14

  • Safari (iOS)

    v15.4+
    2022-03-14

  • Firefox

    v150+
    2026-04-21

stalled

selector
MDN Document
Browser Support

  • Chrome

    v152+
    2026-08-25

  • Edge

    v152+
    2026-08-28

  • Safari

    v15.4+
    2022-03-14

  • Safari (iOS)

    v15.4+
    2022-03-14

  • Firefox

    v150+
    2026-04-21

volume-locked

selector
MDN Document
Browser Support

  • Chrome

    v152+
    2026-08-25

  • Edge

    v152+
    2026-08-28

  • Safari

    v15.4+
    2022-03-14

  • Safari (iOS)

    v15.4+
    2022-03-14

  • Firefox

    v150+
    2026-04-21

sibling-count

type
MDN Document
Browser Support

  • Chrome

    v138+
    2025-06-24

  • Edge

    v138+
    2025-06-26

  • Safari

    v26.2+
    2025-12-12

  • Safari (iOS)

    v26.2+
    2025-12-12

  • Firefox

    v154+
    2026-08-18

sibling-index

type
MDN Document
Browser Support

  • Chrome

    v138+
    2025-06-24

  • Edge

    v138+
    2025-06-26

  • Safari

    v26.2+
    2025-12-12

  • Safari (iOS)

    v26.2+
    2025-12-12

  • Firefox

    v154+
    2026-08-18