Function validateArguments

Countable.js:92–101

* `validateArguments` validates the arguments given to each function call. * Errors are logged to the console as warnings, but Countable fails * silently. * * @private * * @param {Nodes|String} targets A (collection of) element(s) or a single *

(targets, callback)

   */

  function validateArguments (targets, callback) {
    const nodes = Object.prototype.toString.call(targets)
    const targetsValid = typeof targets === 'string' || ((nodes === '[object NodeList]' || nodes === '[object HTMLCollection]') || targets.nodeType === 1)
    const callbackValid = typeof callback === 'function'

    if (!targetsValid) console.error('Countable: Not a valid target')
    if (!callbackValid) console.error('Countable: Not a valid callback function')

    return targetsValid && callbackValid
  }

  /**
   * `count` trims an element's value, optionally strips HTML tags and counts