operator_ref_value_assignment.mdx

id	keywords	name	summary	category
ref-value-assignment	ref assign	:=	This is the `ref value assignment` operator.	operators

This operator assigns a new value to a ref.

<CodeTab labels={["ReScript", "JS Output"]}>

let total = ref(0)
total := 1

var total = {
  contents: 0
};

total.contents = 1;

A ref is a builtin record type with a mutable contents field. Therefore the := operator is just a shorthand version for the following code:

<CodeTab labels={["ReScript", "JS Output"]}>

let total = ref(0)
total.contents = 1

var total = {
  contents: 0
};

total.contents = 1;