<img>
ImageBitmap
ImageBitmapRenderingContext
<canvas>
const image = await createImageBitmap(imageBlob); const canvas = document.createElement('canvas'); const context = canvas.getContext('bitmaprenderer'); context.transferFromImageBitmap(image); canvas.toBlob((outputJPEGBlob) => { // Do something with outputJPEGBlob. }, 'image/jpeg');
createImageBitmap()
imageBlob
el.style.opacity = 0.3; el.style.opacity === "0.3"
el.attributeStyleMap.set("opacity", CSS.number("0.3")); el.attributeStyleMap.get("opacity").value === 0.3
CSSUnitValue
execCommand('copy')
try { await navigator.clipboard.writeText("Hello, clipboard."); } catch { console.error("Unable to write to clipboard."); }
const data = await navigator.clipboard.readText(); console.log("From the clipboard:", data);
ScriptProcessorNode
AudioWorklet
PaintWorklet
AnimationWorklet
add
accumulate
calc()
min()
max()
rgb()
rgba()
deviceorientation
deviceorientationabsolute
devicemotion
'self'
<textarea>
<select>
autocomplete
click
input
change
window.focus()
getCapabilities()
MediaStreamTrack
MediaTrackCapabilities
Function.prototype.toString()
try
catch
String.prototype.trim()
String.prototype.trimStart()
String.prototype.trimLeft()
trimLeft()
trimRight()
Array.prototype.values()
grid-gap
gap
grid-row-gap
row-gap
grid-column-gap
column-gap
この 3 つのプロパティのデフォルト値は、すべて normal です。プレフィックス付きのプロパティは、この新しいプロパティの別名となります。column-gap プロパティはすでに存在し、css-multicol で利用されている点に注意してください。
normal
css-multicol
table-row
table-row-group
table-header-group
table-footer-group
table-cell
table-caption
<tr>
<tbody>
<tfoot>
<thead>
autoplay
keepalive
sendBeacon()
AbortSignal
AbortController
fetch
abortController.abort()
const controller = new AbortController(); const signal = controller.signal; const requestPromise = fetch(url, { signal }); // Abort the fetch: controller.abort();
same-origin
CORS
FetchEvent.clientId
RTCRtpSender.dtmf
CreateDTMFSender()
object-position
perspective-origin
top right 20%
ImageCapture.prototype.setOptions()
document.createTouch()
document.createTouchList()
AudioParam.prototype.value
AudioParam
AudioParam.prorotype.setTargetAtTime()
