PressureRecord: toJSON() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Note: This feature is available in Web Workers, except for Service Workers.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The toJSON()
method is a serializer; it returns a JSON representation of the PressureRecord
object.
Syntax
toJSON()
Parameters
None.
Return value
A JSON
object that is the serialization of the PressureRecord
object.
Examples
Using the toJSON
method
In this example, calling lastRecord.toJSON()
returns a JSON representation of the PressureRecord
object.
function callback(records) {
const lastRecord = records[records.length - 1];
console.log(lastRecord.toJSON);
}
try {
const observer = new PressureObserver(callback);
await observer.observe("cpu", {
sampleInterval: 1000, // 1000ms
});
} catch (error) {
// report error setting up the observer
}
This would log a JSON object like so:
{
"source": "cpu",
"state": "fair",
"time": 1712052746385.347
}
To get a JSON string, you can use JSON.stringify(lastRecord)
directly; it will call toJSON()
automatically.
Specifications
Specification |
---|
Compute Pressure Level 1 # the-tojson-member |
Browser compatibility
BCD tables only load in the browser