CSS3 Background-image options
New properties to affect background images, including background-clip, background-origin and background-size
:optional CSS pseudo-class
The `:optional` pseudo-class matches form inputs (`<input>`, `<textarea>`, `<select>`) which are not `:required`.
"once" event listener option
Causes an event listener to be automatically removed after it gets invoked, so that it only gets invoked once. Similar to jQuery's `$.one()` feature.
X-Frame-Options HTTP header
An HTTP header which indicates whether the browser should allow the webpage to be displayed in a frame within another webpage. Used as a defense against clickjacking attacks.
cookiestore api: delete: `partitioned` option
cookiestore api: set: `partitioned` option
credentialscontainer api: create: `publickey` option
credentialscontainer api: create: `publickey` option: `attestation` option
credentialscontainer api: create: `publickey` option: `attestation` option: direct
credentialscontainer api: create: `publickey` option: `attestation` option: enterprise
credentialscontainer api: create: `publickey` option: `attestation` option: indirect
credentialscontainer api: create: `publickey` option: `attestation` option: none
credentialscontainer api: create: `publickey` option: `create()` extensions
credentialscontainer api: create: `publickey` option: `create()` extensions: `payment` extension
credentialscontainer api: create: `publickey` option: requireresidentkey
credentialscontainer api: create: `publickey` option: residentkey
credentialscontainer api: get: `identity` option
credentialscontainer api: get: `identity` option: `identity.context`
credentialscontainer api: get: `identity` option: error api
credentialscontainer api: get: `identity` option: `identity.providers.loginhint`
credentialscontainer api: get: `otp` option
credentialscontainer api: get: `publickey` option
credentialscontainer api: get: `publickey` option: `get()` extensions
credentialscontainer api: get: `publickey` option: `get()` extensions: `appid` extension
credentialscontainer api: get: `publickey` option: `get()` extensions: `largeblob` extension
css api: `supports()` static method: parentheses for single-argument version are optional.
gpudevice api: createcomputepipelineasync: `entrypoint` properties are optional for determined default compute shader entry points.
gpudevice api: createcomputepipeline: `entrypoint` properties are optional for determined default compute shader entry points.
gpudevice api: createrenderpipelineasync: `depthcompare` and `depthwriteenabled` properties are optional when not needed (for example, formats without depth).
gpudevice api: createrenderpipelineasync: `entrypoint` properties are optional for determined default fragment and vertex shader entry points.
gpudevice api: createrenderpipeline: `depthcompare` and `depthwriteenabled` properties are optional when not needed (for example, formats without depth).
gpudevice api: createrenderpipeline: `entrypoint` properties are optional for determined default fragment and vertex shader entry points.
htmldatalistelement api: options
htmlselectelement api: options
pushsubscription api: options
range api: collapse: `tostart` parameter is optional
response api: `response()` constructor: `body` parameter is optional
rtcrtpscripttransformer api: options
selection api: collapse: `offset` parameter is optional
selection api: extend: `offset` parameter is optional
urlpattern api: `urlpattern()` constructor: `ignorecase` option
css property: border-image: optional `<border-image-slice>`
html element: option
html element: option: disabled
html element: option: label
html element: option: selected
html element: option: value
http method: options
javascript operator: optional chaining operator (`?.`)
javascript statement: `try...catch`: optional catch binding
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