Mass retagger funciton for ID OSM editor

osm.js

// select one or multiple things and ctrl+E to retag them

var context = id;
var addTags = { highway: 'residential'}; // change this as needed 
//var removeTags = ['area','natural','landuse'];

function changeTags() {
  if (iD.d3.event) { iD.d3.event.preventDefault(); }

  var actions = [],
      entities = context.selectedIDs().map(context.entity);

  entities.forEach(function(entity) {
    var newTags = Object.assign({}, entity.tags, addTags);  // probably won't work in IE11
    //removeTags.forEach(function(t) { delete newTags[t]; });
    actions.push(iD.actionChangeTags(entity.id, newTags));
  });

  if (actions.length) {
     actions.push('Changed a lot of tags');
     context.perform.apply(context, actions);
  }
}

var myKeybinding = iD.d3keybinding('changeTags').on(iD.uiCmd('⌘E'), changeTags);
iD.d3.select(document).call(myKeybinding);