Make a connection between different contexts inside the extension.
You can call this:
Note that you can't use this function to connect an extension to its content scripts. To do this, use
tabs.connect()
.
var port = browser.runtime.connect(
extensionId
,
// optional string
connectInfo
// optional object
)
extensionId
可选
string
. The ID of the extension to connect to. If the target has set an ID explicitly using the
应用程序
key in manifest.json, then
extensionId
should have that value. Otherwise it should have the ID that was generated for the target.
connectInfo
可选
对象
. Details of the connection:
名称
可选
string
. Will be passed into
runtime.onConnect
for processes that are listening for the connection event.
includeTlsChannelId
可选
boolean
. Whether the TLS channel ID will be passed into
runtime.onConnectExternal
for processes that are listening for the connection event.
runtime.Port
. Port through which messages can be sent and received. The port's
onDisconnect
event is fired if the extension does not exist.
BCD tables only load in the browser
This content script:
Port
in a variable called
myPort
.
myPort
and logs them.
myPort
, when the user clicks the document.
// content-script.js
var myPort = browser.runtime.connect({name:"port-from-cs"});
myPort.postMessage({greeting: "hello from content script"});
myPort.onMessage.addListener(function(m) {
console.log("In content script, received message from background script: ");
console.log(m.greeting);
});
document.body.addEventListener("click", function() {
myPort.postMessage({greeting: "they clicked the page!"});
});
The corresponding background script:
portFromCS
.
portFromCS
, when the user clicks the extension's browser action.
// background-script.js
var portFromCS;
function connected(p) {
portFromCS = p;
portFromCS.postMessage({greeting: "hi there content script!"});
portFromCS.onMessage.addListener(function(m) {
console.log("In background script, received message from content script")
console.log(m.greeting);
});
}
browser.runtime.onConnect.addListener(connected);
browser.browserAction.onClicked.addListener(function() {
portFromCS.postMessage({greeting: "they clicked the button!"});
});
注意：
This API is based on Chromium's
chrome.runtime
API. This documentation is derived from
runtime.json
in the Chromium code.
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.
最后修改： , 由 MDN 贡献者