window.requestIdleCallback() - Web APIs
the window.requestidlecallback() method queues a function to be called during a browser's idle periods.
... you can call requestidlecallback() within an idle callback function to schedule another callback to take place no sooner than the next pass through the event loop.
... syntax var handle = window.requestidlecallback(callback[, options]) return value an id which can be used to cancel the callback by passing it into the window.cancelidlecallback() method.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetrequestidlecallback experimentalchrome full support 47edge full support 79firefox full support 55notes full support 55notes notes enabled by default.

paymentRequestId - Web APIs
the paymentrequestid read-only property of the paymentrequestevent interface returns the id of the paymentrequest object.
... syntax var id = paymentrequestevent.paymentrequestid value a domstring contains the id.
... specifications specification status comment payment handler apithe definition of 'paymentrequestid' in that specification.

PaymentResponse.requestId - Web APIs
the requestid read-only property of the paymentresponse interface rreturns the free-form identifier supplied by the paymentresponse() constructor by details.id.
... specifications specification status comment payment request apithe definition of 'requestid' in that specification.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetrequestidchrome full support 61edge full support 16firefox full support 56notes disabled full support 56notes disabled notes available only in nightly builds.disabled from version 56: this feature is behind the dom.payments.requ...

nsISmsRequestManager
to create an instance, use: var smsrequestmanager = components.classes["@mozilla.org/sms/smsrequestmanager;1"] .createinstance(components.interfaces.nsismsrequestmanager); method overview long addrequest(in nsidommozsmsrequest arequest); long createrequest(in nsidommozsmsmanager amanager, out nsidommozsmsrequest arequest); void notifycreatemessagelist(in long arequestid, in long alistid, in nsidommozsmsmessage amessage); void notifygetsmsfailed(in long arequestid, in long aerror); void notifygotnextmessage(in long arequestid, in nsidommozsmsmessage amessage); void notifygotsms(in long arequestid, in nsidommozsmsmessage amessage); void notifymarkedmessageread(in long arequestid, in bool aread); void notifymarkmessagereadfailed(in long arequestid, in lon...
...g aerror); void notifynomessageinlist(in long arequestid); void notifyreadmessagelistfailed(in long arequestid, in long aerror); void notifysmsdeleted(in long arequestid, in bool adeleted); void notifysmsdeletefailed(in long arequestid, in long aerror); void notifysmssendfailed(in long arequestid, in long aerror); void notifysmssent(in long arequestid, in nsidommozsmsmessage amessage); constants all sms related errors that could apply to smsrequest objects.
...notifycreatemessagelist() void notifycreatemessagelist( in long arequestid, in long alistid, in nsidommozsmsmessage amessage ); parameters arequestid a number representing the id of the request.
...And 11 more matches

Background Tasks API - Web APIs
the cooperative scheduling of background tasks api (also referred to as the background tasks api or simply the requestidlecallback() api) provides the ability to queue tasks to be executed automatically by the user agent when it determines that there is free time to do so.
...window.requestidlecallback() makes it possible to become actively engaged in helping to ensure that the browser's event loop runs smoothly, by allowing the browser to tell your code how much time it can safely use without causing the system to lag.
... window.requestidlecallback = window.requestidlecallback || function(handler) { let starttime = date.now(); return settimeout(function() { handler({ didtimeout: false, timeremaining: function() { return math.max(0, 50.0 - (date.now() - starttime)); } }); }, 1); } if window.requestidlecallback is undefined, we create it here.
...And 10 more matches

nsISmsDatabaseService
= components.classes["@mozilla.org/sms/smsdatabaseservice;1"] .createinstance(components.interfaces.nsismsdatabaseservice); method overview long savereceivedmessage(in domstring asender, in domstring abody, in unsigned long long adate); long savesentmessage(in domstring areceiver, in domstring abody, in unsigned long long adate); void getmessage(in long messageid, in long requestid, [optional] in unsigned long long processid); void deletemessage(in long messageid, in long requestid, [optional] in unsigned long long processid); void createmessagelist(in nsidommozsmsfilter filter, in boolean reverse, in long requestid, [optional] in unsigned long long processid); void getnextmessageinlist(in long listid, in long requestid, [optional] in unsigned long long processid); ...
...void clearmessagelist(in long listid); void markmessageread(in long messageid, in boolean value, in long requestid, [optional] in unsigned long long processid) methods savereceivedmessage() void savereceivedmessage( in domstring asender, in domstring abody, in unsigned long long adate ); parameters asender a domstring with the sender of the text message.
... getmessage() void getmessage( in long messageid, in long requestid, [optional] in unsigned long long processid ); parameters messageid a number representing the id of the message.
...And 9 more matches

Index - Web APIs
225 background tasks api api, background tasks api, guide, idledeadline, overview, cancelidlecallback, requestidlecallback the cooperative scheduling of background tasks api (also referred to as the background tasks api or simply the requestidlecallback() api) provides the ability to queue tasks to be executed automatically by the user agent when it determines that there is free time to do so.
... 2129 iirfilternode.getfrequencyresponse() api, audio, iirfilternode, method, reference, web audio api, filter, getfrequencyresponse undefined 2130 idledeadline api, background tasks api, idledeadline, interface, reference, requestidlecallback see our complete example in the article cooperative scheduling of background tasks api.
... 2131 idledeadline.didtimeout api, background tasks, html dom, idledeadline, needsexample, property, reference, window, didtimeout, requestidlecallback the read-only didtimeout property on the idledeadline interface is a boolean value which indicates whether or not the idle callback is being invoked because the timeout interval specified when window.requestidlecallback() was called has expired.
...And 4 more matches

Movement, orientation, and motion: A WebXR example - Web APIs
setup and utility functions next, we declare the variables and constants used throughout the application, starting with those used to store webgl and webxr specific information: let polyfill = null; let xrsession = null; let xrinputsources = null; let xrreferencespace = null; let xrbutton = null; let gl = null; let animationframerequestid = 0; let shaderprogram = null; let programinfo = null; let buffers = null; let texture = null; let mouseyaw = 0; let mousepitch = 0; this is followed by a set of constants, mostly to contain various vectors and matrices used while rendering the scene.
...refspacetype = "local"; } else { refspacetype = "viewer"; } mat4.fromtranslation(cubematrix, viewerstartposition); vec3.copy(cubeorientation, viewerstartorientation); xrsession.requestreferencespace(refspacetype) .then((refspace) => { xrreferencespace = refspace.getoffsetreferencespace( new xrrigidtransform(viewerstartposition, cubeorientation)); animationframerequestid = xrsession.requestanimationframe(drawframe); }); return xrsession; } after storing the newly-created xrsession object into xrsession, the label of the button is set to "exit webxr" to indicate its new function after starting the scene, and a handler is installed for the end event, so we get notified when the xrsession ends.
... function sessionended() { xrbutton.innertext = "enter webxr"; if (animationframerequestid) { xrsession.cancelanimationframe(animationframerequestid); animationframerequestid = 0; } xrsession = null; } we can also call sessionended() directly if we wish to programmatically end the webxr session.
... let lastframetime = 0; function drawframe(time, frame) { let session = frame.session; let adjustedrefspace = xrreferencespace; let pose = null; animationframerequestid = session.requestanimationframe(drawframe); adjustedrefspace = applyviewercontrols(xrreferencespace); pose = frame.getviewerpose(adjustedrefspace); if (pose) { let gllayer = session.renderstate.baselayer; gl.bindframebuffer(gl.framebuffer, gllayer.framebuffer); logglerror("bindframebuffer"); gl.clearcolor(0, 0, 0, 1.0); gl.cleardepth(1.0); // clear eve...

window.cancelIdleCallback() - Web APIs
summary the window.cancelidlecallback() method cancels a callback previously scheduled with window.requestidlecallback().
... syntax window.cancelidlecallback(handle); parameters handle the id value returned by window.requestidlecallback() when the callback was established.
...experimentalchrome full support 47edge full support 79firefox full support 55 full support 55 full support 53disabled disabled from version 53: this feature is behind the dom.requestidlecallback.enabled preference (needs to be set to true).
... full support 47chrome android full support 47firefox android full support 55 full support 55 full support 53disabled disabled from version 53: this feature is behind the dom.requestidlecallback.enabled preference (needs to be set to true).

Performance best practices for Firefox front-end engineers
use requestidlecallback() if you simply cannot avoid doing some kind of long job on the main thread, try to break it up into smaller pieces that you can run when the browser has a free moment to spare, and the user isn't doing anything.
... you can do that using requestidlecallback() and the cooperative scheduling of background tasks api, and doing it only when we have a free second where presumably the user isn’t doing something.
... see also the blog post collective scheduling with requestidlecallback.

nsIRadioInterfaceLayer
lephonycallback callback); void getdatacalllist(); unsigned short getnumberofmessagesfortext(in domstring text); void hangup(in unsigned long callindex); void registercallback(in nsiriltelephonycallback callback); void registerdatacallcallback(in nsirildatacallback callback); void rejectcall(in unsigned long callindex); void sendsms(in domstring number, in domstring message, in long requestid, in unsigned long long processid); void setupdatacall(in long radiotech, in domstring apn, in domstring user, in domstring passwd, in long chappap, in domstring pdptype); void starttone(in domstring dtmfchar); void stoptone(); void unregistercallback(in nsiriltelephonycallback callback); void unregisterdatacallcallback(in nsirildatacallback callback); attributes attribute type des...
...void sendsms( in domstring number, in domstring message, in long requestid, in unsigned long long processid ); parameters number a domstring with a telephone number to send to.
...requestid missing description processid missing description setupdatacall() pdp apis.

nsISmsService
rvice); method overview [implicit_jscontext] nsidommozsmsmessage createsmsmessage(in long id, in domstring delivery, in domstring sender, in domstring receiver, in domstring body, in jsval timestamp, in bool read ); unsigned short getnumberofmessagesfortext(in domstring text); boolean hassupport(); void send(in domstring number, in domstring message, in long requestid, [optional] in unsigned long long processid); methods createsmsmessage() [implicit_jscontext] nsidommozsmsmessage createsmsmessage( in long id, in domstring delivery, in domstring sender, in domstring receiver, in domstring body, in jsval timestamp, in bool read ); parameters id a number representing the id of the message.
... send() void send( in domstring number, in domstring message, in long requestid, in unsigned long long processid optional ); parameters number a domstring with a telephone number to send to.
... requestid missing description processid optional missing description see also smsmanager smsmessage ...

Rendering and the WebXR frame animation callback - Web APIs
kicking off the renderer thus looks like this: let worldrefspace; async function runxr(xrsession) { worldrefspace = await xrsession.requestreferencespace("immersive-vr"); if (worldrefspace) { viewerrefspace = worldrefspace.getoffsetreferencespace( new xrrigidtransform(viewerstartposition, viewerstartorientation)); animationframerequestid = xrsession.requestanimationframe(mydrawframe); } } after getting a reference space for the immersive world, this creates an offset reference space representing the position and orientation of the viewer by creating an xrrigidtransform representing that position and orientation, then calling the xrreferencespace method getoffsetreferencespace().
... animationframerequestid = session.requestanimationframe(mydrawframe); // get an xrviewerpose representing the position and // orientation of the viewer.
... for example, to reduce the frame rate by 50%, just skip every other frame: let tick = 0; function drawframe(time, frame) { animationframerequestid = frame.session.requestanimationframe(drawframe); if (!(tick % 2)) { /* draw the scene */ } tick++; } this version of the frame callback maintains a tick counter.

PaymentRequest.prototype.id - Web APIs
const details = { id: "super-store-order-123-12312", total: { label: "total due", amount: { currency: "usd", value: "65.00" }, }, }; const request = new paymentrequest(methoddata, details); console.log(request.id); // super-store-order-123-12312 the id is then also available in the paymentresponse returned from the show() method, but under the requestid attribute.
... const response = await request.show(); console.log(response.requestid === request.id); // and in serialized form too const json = response.tojson(); console.log(json.requestid,response.requestid, request.id); syntax var id = paymentrequest.id value a domstring.

Spaces and reference spaces: Spatial tracking in WebXR - Web APIs
for example, given an xrsession whose reference space is worldrefspace, the following line of code would request the first frame of animation to be scheduled: animationframerequestid = xrsession.requestanimationframe(mydrawframe); then, the mydrawframe() function—the callback executed when it's time to draw the frame—might be something like this: function mydrawframe(currentframetime, frame) { let session = frame.session; let viewerpose = frame.getviewerpose(viewerrefspace); animationframerequestid = session.requestanimationframe(mydrawframe); if (viewerpose)...
... let previousviewerpose = null; function mydrawframe(currentframetime, frame) { let session = frame.session; let viewerpose = frame.getviewerpose(viewerrefspace); animationframerequestid = session.requestanimationframe(mydrawframe); if (viewerpose) { if (!previousviewerpose) { previousviewerpose = viewerpose; } let offsetmatrix = mat4.create(); mat4.sub(offsetmatrix, previousviewerpose.transform.matrix, viewerpose.transform.matrix); previousviewerpose = viewerpose; } } continuity and recovery after tracking loss sometimes, while th...