RTCSessionDescription.type

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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。

The property RTCSessionDescription.type is a read-only value of type RTCSdpType which describes the description's type.

var value = sessionDescription.type;
sessionDescription.type = value;

The possible values are defined by an enum of type RTCSdpType.

The allowed values are those of an enum of type RTCSdpType :

"offer" , the description is the initial proposal in an offer/answer exchange.
"answer" , the description is the definitive choice in an offer/answer exchange.
"pranswer" , the description is a provisional answer and may be changed when the definitive choice will be given.
" rollback ", the description rolls back to offer/answer state to the last stable state.

// The remote description has been set previously on pc, a RTCPeerconnection
alert(pc.remoteDescription.type);

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCSessionDescription.type' in that specification.	候选推荐	最初的规范。

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`type`	Chrome Yes	Edge 15	Firefox Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: moz	IE No	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes