Get Array of Checked checkbox Values #javascript

getCheckedBoxValues.js

// collection of checkboxes obtained by getElementsByName()

/**
 * get array of values for checked boxes in a collection
 * @param {htmlElementCollection} checkBoxCollection collection of checkbox elements
 * @return {Array} array of the values of the checked boxes
 */
function getCheckedBoxValues(checkBoxCollection) {
  var checkedValues = [],
    i,
    iMax;
  if (checkBoxCollection) {
    iMax = checkBoxCollection.length;
    for (i = 0; i < iMax; i++) {
      if (checkBoxCollection[i].check === true) {
        checkedValues.push(checkBoxCollection[i].value);
      }
    }
    return checkedValues;
  } else {
    console.log('Error: no input recieved');
    return null;
  }
}