Utility function to coerce a value of any native JavaScript data type to a boolean representation.

isEmpty.js

function isEmpty(data) {
    if (typeof data === 'number' || typeof data === 'boolean') {
        return false
    }

    if (typeof data === 'undefined' || data === null) {
        return true
    }

    if (typeof data.length !== 'undefined') {
        if (typeof data === 'string') return data.trim().length === 0
        return data.length === 0
    }

    let count = 0
    for (let i in data) {
        if (data.hasOwnProperty(i)) {
            count++
        }
    }

    return count === 0
}