Class Counter

Decreases the value of the counter by delta. If delta is not given, decreases the value of the counter by 1.

Will throw an error if used outside of a change callback.

Increases the value of the counter by delta. If delta is not given, increases the value of the counter by 1.

Will throw an error if used outside of a change callback.

Returns the counter value, so that a JSON serialization of an Automerge document represents the counter simply as an integer.

Returns the counter value as a decimal string. If x is a counter object, this method is called e.g. when you do ['value: ', x].join('') or when you use string interpolation: value: ${x}.

A peculiar JavaScript language feature from its early days: if the object x has a valueOf() method that returns a number, you can use numerical operators on the object x directly, such as x + 1 or x < 4. This method is also called when coercing a value to a string by concatenating it with another string, as in x + ''. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf