prewarm()
prewarm():
void
Initializes resources like WebWorkers that can be shared across maps to lower load
times in some situations. setWorkerUrl() and setWorkerCount(), if being
used, must be set before prewarm() is called to have an effect.
By default, the lifecycle of these resources is managed automatically, and they are
lazily initialized when a Map is first created. By invoking prewarm(), these
resources will be created ahead of time, and will not be cleared when the last Map
is removed from the page. This allows them to be re-used by new Map instances that
are created later. They can be manually cleared by calling
clearPrewarmedResources(). This is only necessary if your web page remains
active but stops using maps altogether.
This is primarily useful when using GL-JS maps in a single page app, wherein a user would navigate between various views that can cause Map instances to constantly be created and destroyed.
Returns
void