NTSL2++ example script

calculator.js

calculator = {
    expr: '',
    res: 0,
    draw() {
        Term.clear()
        Term.write('Expr: ' + this.expr, true, (data) => this.handleExpr(data))
        Term.write('\r\n\r\n')
        Term.write('Res:  ' + this.res)
    },
    handleExpr(data) {
        this.expr = data
        this.res = eval(data)
        this.draw()
    }
}

calculator.draw()