这是
实验性技术
检查
浏览器兼容性表格
要小心谨慎在生产中使用这之前。
supports()
方法在
DOMTokenList
interface returns
true
if a given
token
is in the associated attribute's supported tokens. This method is intended to support feature detection.
let trueOrFalse = element.supports(token)
token
DOMString
containing the token to query for.
A
布尔
indicating whether the token was found.
let iframe = document.getElementById('display');
if (iframe.sandbox.supports('an-upcoming-feature')) {
// support code for mystery future feature
} else {
// fallback code
}
if (iframe.sandbox.supports('allow-scripts')) {
// instruct frame to run JavaScript
//
// (NOTE: This feature is well-supported; this is just an example!)
//
}
| 规范 | 状态 | 注释 |
|---|---|---|
| Credential Management Level 1 | 工作草案 | 初始定义。 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
supports
|
Chrome 49 | Edge 17 | Firefox 49 | IE 不支持 No | Opera 36 | Safari 10 | WebView Android 49 | Chrome Android 49 | Firefox Android 49 | Opera Android 36 | Safari iOS 10 | Samsung Internet Android 5.0 |
完整支持
不支持
实验。期望将来行为有所改变。
DOMTokenList
AbortController
AbortSignal
AbstractRange
Attr
ByteString
CDATASection
CSSPrimitiveValue
CSSValue
CSSValueList
CharacterData
ChildNode
注释
CustomEvent
DOMConfiguration
DOMError
DOMErrorHandler
DOMException
DOMImplementation
DOMImplementationList
DOMImplementationRegistry
DOMImplementationSource
DOMLocator
DOMObject
DOMParser
DOMPoint
DOMPointInit
DOMPointReadOnly
DOMRect
DOMString
DOMTimeStamp
DOMUserData
Document
DocumentFragment
DocumentType
元素
ElementTraversal
Entity
EntityReference
事件
EventTarget
HTMLCollection
MutationObserver
节点
NodeFilter
NodeIterator
NodeList
NonDocumentTypeChildNode
ProcessingInstruction
PromiseResolver
范围
StaticRange
文本
TextDecoder
TextEncoder
TimeRanges
TreeWalker
TypeInfo
USVString
UserDataHandler
XMLDocument