is-submittable/index.js

check if the given form element is submittable.

var rtype = /^(?:submit|button|image|reset|file)$/i;
var rname = /^(?:input|select|textarea|keygen)$/i;
var rcheck = /^(?:checkbox|radio)$/i;

/**
 * Check if the given `el` is submittable.
 *
 * @param {Element} el  The input element to check.
 * @return {Boolean}
 */
module.exports = function (el) {
  return !el.disabled
    && !!el.name
    && !rtype.test(el.type)
    && rname.test(el.nodeName)
    && (!rcheck.test(el.type)
    || el.checked);
};