A simple calculator using js expressions

Open js-expression in Script Kit

// Name: JS Expression
// Description: I prefer to define it as a simple calculator

// Global Objects
let arr = [1, 2, 3, 4, 5]
let obj = {name: 'Mike', age: 20}

// Global Functions
let {
    ceil, floor, round, trunc, abs, PI,
    sin, cos, tan, log, log2, log10, exp, sqrt, cbrt, pow
} = Math

// Factorial
let fact = num => _.reduce(_.range(1, num + 1), (acc, i) => acc * i, 1)

let selected = await arg({
    placeholder: 'Expression ...',
    enter: 'Copy & Exit',
    shortcuts: [{
        name: 'Repalce', key: 'cmd+r', bar: 'right', onPress: async (input, {focused}) => {
            setInput(evalExp(input))
        }
    }]
}, async (input) => {
    let res = input ? evalExp(input) : ''
    return md(`~~~javascript\n${res}\n~~~`)
})

if (selected) await copy(evalExp(selected))

function evalExp(input) {
    let value = eval(`(${input})`)
    if (typeof value == 'number') return (value % 1 != 0 ? value.toFixed(2) : value) + ''
    if (typeof value == 'array') return JSON.stringify(value, null, 2)
    if (typeof value == 'object') return JSON.stringify(value, null, 2)
    if (typeof value == 'function') return ''
}