Skip to main content

Global variables and methods

Console​

console.log()​

console.log(...)

Prints log message to either application configured debug output stream or to inspector's log view. 

console.log("format", ...)

Prints log message using C-style printf conventions.

console.warn()​

console.error()​

Same as console.log() but prints messages using different meta type.

console.reportException(err,isPromise)​

Unhandled exceptions handler, all not handled exceptions go here. This function can be overriden to implement custom handler:

console.reportException = function(err,isPromise) {
   Window.this.modal(<alert>{err.toString()}</alert>);
   return "";
}

Timers and intervals​

setTimeout()​

setTimeout(func:function,milliseconds:int): timerId

Calls the func after milliseconds timeout.

The function returns timer id value that can be used with clearTimeout()

clearTimeout()​

clearTimeout(timerId)

The function cancels previously created timer.

tip::: Sciter provides also element timers that can work as timeouts and intervals:

  document.timer(500ms, ()=>{ ... });

In some cases they are more flexible as they also support auto cancelling to implement effective call throttling. :::

setInterval()​

setInterval(func,milliseconds): intId

Calls the func periodically with milliseconds interval. Retuns interval ID.

clearInterval()​

 clearInterval(intId)

Stops interval by its intId.

requestAnimationFrame()​

requestAnimationFrame(func): animId

Schedules func to be executed at next paint event (<= 16ms - 60 FPS usually).

The function gets executed once, so for periodic calls it needs to be called inside that func again.

cancelAnimationFrame(a)​

cancelAnimationFrame(animId)

HTTP client​

fetch()​

fetch(url:string | Request [, options:object]): Response

see Fetch

Sciter specific​

printf()​

printf(format:string, ...):string

This function does formatting of arguments using C-style printf conventions.

Returns formatted string.

In Sciter list of standard formatting types is extended by these two:

  • %v - takes argument and prints it as JSON.stringify(arg);
  • %V - takes argument and prints it as JSON.stringify(arg, null, " ");

scanf()​

scanf(format:string, input: string) : [...]

Takes input string and parses it according the format specification using C-style scanf conventions.

Returns list (array) of successfully parsed values.

evalModule()​

evalModule(text:string [,url:string]):object

"module" version of JS stock eval() function - evaluates the text as a module body.

If the url is provided it is used as a base URL for resolving relative paths in import ... from "relpath" statements inside.

The function returns module's exported data as an object.

loadScript()​

loadScript(url:string);

Loads and executes JavaScript at url synchronously.

That's an equivalent of 

document.append(<script src=url />);

but without physical DOM update.

loadScriptModule()​

loadScriptModule(url:string): object

Loads and executes JavaScript module at url synchronously. Returns modules export object.

That's an equivalent of 

document.append(<script src=url />);

but without physical DOM update.

global properties​

globalThis​

object, global namespace, aliased as window for compatibility with browsers.

devicePixelRatio​

float, number of physical screen pixels in logical CSS px (dip).