counter

@fluidframework/counter

A SharedCounter is a shared object which holds a number that can be incremented or decremented.

Creation

To create a SharedCounter, get the factory and call create with a runtime and string ID:

const factory = SharedCounter.getFactory();
const counter = factory.create(this.runtime, id) as SharedCounter;

Usage

Once created, you can call increment to modify the value with either a positive or negative number:

counter.increment(10); // add 10 to the counter value
counter.increment(-5); // subtract 5 from the counter value

To observe changes to the value (including those from remote clients), register for the "incremented" event:

counter.on("incremented", (incrementAmount, newValue) => {
    console.log(`The counter incremented by ${incrementAmount} and now has a value of ${newValue}`);
});