Discussion on: Utils for JavaScript - what do you use regularly?

[bravemaster619]

Safe number for price calculations.

const safeNumber = (num, defaultValue = 0, allowNegative = false) => {
  if (!num) {
    num = 0;
  }
  num = Number(num)
  if (isNaN(num)) {
    if (defaultValue === undefined) {
      console.log(num)
      throw new Error('Given argument is NaN')
    } else {
      return defaultValue
    }
  }
  if (num === Infinity) {
    if (defaultValue === undefined) {
      console.log(num)
      throw new Error('Given argument is infinity')
    } else {
      return defaultValue
    }
  }
  if (!allowNegative && num < 0) {
    if (defaultValue === undefined) {
      console.log(num)
      throw new Error('Given argument is negative')
    } else {
      return defaultValue
    }
  }
  return num
}