unique-selector/lib/getNthChild.js

Given a DOM node, return a unique CSS selector matching only that element

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getNthChild = getNthChild;

var _isElement = require('./isElement');

/**
 * Returns the selectors based on the position of the element relative to its siblings
 * @param  { Object } element
 * @return { Array }
 */
function getNthChild(element) {
  var counter = 0;
  var k = void 0;
  var sibling = void 0;
  var parentNode = element.parentNode;


  if (Boolean(parentNode)) {
    var childNodes = parentNode.childNodes;

    var len = childNodes.length;
    for (k = 0; k < len; k++) {
      sibling = childNodes[k];
      if ((0, _isElement.isElement)(sibling)) {
        counter++;
        if (sibling === element) {
          return ':nth-child(' + counter + ')';
        }
      }
    }
  }
  return null;
}