function _getElements(input) {
      var elements;
      if (typeof input === 'string' || input instanceof String) {
        // See https://davidwalsh.name/nodelist-array for the technique transforming nodeList -> Array.
        elements = [].slice.call(document.querySelectorAll(input));
        // I checked the 'input instanceof NodeList' test in IE9 and modern browsers and it worked for me.
      } else if (Array.isArray(input) || input instanceof NodeList) {
        elements = [].slice.call(input);
      } else {
        throw new Error('The selector provided to AnchorJS was invalid.');
      }
      return elements;
    }
function _getElements(input) {
      var elements;
      if (typeof input === 'string' || input instanceof String) {
        
        elements = [].slice.call(document.querySelectorAll(input));
        
      } else if (Array.isArray(input) || input instanceof NodeList) {
        elements = [].slice.call(input);
      } else {
        throw new Error('The selector provided to AnchorJS was invalid.');
      }
      return elements;
    }
function _getElements ( input ) { var elements ; if ( typeof input === 'string' || input instanceof String ) { // See https://davidwalsh.name/nodelist-array for the technique transforming nodeList -> Array. elements = [ ] . slice . call ( document . querySelectorAll ( input ) ) ; // I checked the 'input instanceof NodeList' test in IE9 and modern browsers and it worked for me. } else if ( Array . isArray ( input ) || input instanceof NodeList ) { elements = [ ] . slice . call ( input ) ; } else { throw new Error ( 'The selector provided to AnchorJS was invalid.' ) ; } return elements ; }
Turns a selector, nodeList, or array of elements into an array of elements (so we can use array methods).
It also throws errors on any other inputs. Used to handle inputs to .add and .remove.
@param  {String|Array|Nodelist} input - A CSS selector string targeting elements with anchor links,
OR a nodeList / array containing the DOM elements.
@returns {Array} - An array containing the elements we want.
Turns a selector nodeList or array of elements into an array of elements ( so we can use array methods ) . It also throws errors on any other inputs . Used to handle inputs to . add and . remove .