A presumptive function with exhaustive data type tests for empty, null, values.

isBlank.js

export default (tr) => {
  const hasLength = (val) => val.length
  const noTest = () => true
  const notZero = (val) => val !== 0
  const types = {
    'symbol': (val) => val.description === "",
    'function': noTest,
    'undefined': noTest,
    'bigint': notZero,
    'object': (val) => Object.is(val, {}),
    'boolean': (val) => val,
    'array': hasLength,
    'string': hasLength,
    'number': notZero,
  }
  return !types[typeof tr](tr)
}