mastodon/app/javascript/mastodon/actions/filters.js

import api from '../api';

export const FILTERS_FETCH_REQUEST = 'FILTERS_FETCH_REQUEST';
export const FILTERS_FETCH_SUCCESS = 'FILTERS_FETCH_SUCCESS';
export const FILTERS_FETCH_FAIL    = 'FILTERS_FETCH_FAIL';

export const fetchFilters = () => (dispatch, getState) => {
  dispatch({
    type: FILTERS_FETCH_REQUEST,
    skipLoading: true,
  });

  api(getState)
    .get('/api/v1/filters')
    .then(({ data }) => dispatch({
      type: FILTERS_FETCH_SUCCESS,
      filters: data,
      skipLoading: true,
    }))
    .catch(err => dispatch({
      type: FILTERS_FETCH_FAIL,
      err,
      skipLoading: true,
      skipAlert: true,
    }));
};