Comments

/* This is a comment */
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Let bindings

let name = "Alonzo Church"
let message = `Hello ${name}`
let message2 = `Hello ${person.name}`
let result = `Testing => ${Module.Another.value}`
let value = 1
let result = 1 + 1
let langs = ["ReScript", "JavaScript"]
let person = ("Alonzo", 32)

Type declarations & Functions

type role = | Admin | Editor | Viewer 
type numeric = #1 | #2 | #3
type normal = #Poly | #Variant
type myPolyVar = [ #"poly-variant" | #"test-chars" ]

type person = {
 name: string,
 age: int,
 role: role
}

type record = {
  "field": string
}

let sum = (a, b) => a + b
let sum2 = (a:int, b: int) => a + b

Modules, JSX & Components

%%raw(``)
module Button = {
  @react.component
  let make = (~count: int) =>{
    let times = switch count {
    | 1 => "once"
    | 2 => "twice"
    | n => Belt.Int.toString(n) ++ " times"
    }
    let msg = "Click me " ++ times

	<button onClick={Js.log}>{msg->React.string}</button>;
  }
}

@react.component
let make = () => <MyModule.Button count=1 />