checkbox input on or off

checkbox_on_off.js

require([
    'jquery',
    'underscore',
    'splunkjs/mvc',
    'splunkjs/mvc/simplexml/ready!'
], function(
    $,
    _,
    mvc
) {
    function submit_and_update_url() {
        submitted_tokens.set(unsubmitted_tokens.toJSON());
        mvc.Components.get('url').saveOnlyWithPrefix('form\\.', unsubmitted_tokens.toJSON(), {
            replaceState: false
        });
    }

    var unsubmitted_tokens = mvc.Components.get('default');
    var submitted_tokens = mvc.Components.get('submitted');

    $("#field1").hide(); // selected_system_name

    // A single checkbox
    var nfl_only = mvc.Components.getInstance("field4");

    nfl_only.on("change", function() {
        // Used like this: | tstats count from datamodel=nfl where host=* $nfl_lookup_string$
        // If checked
        if(this.val().length > 0) {
            unsubmitted_tokens.set('nfl_lookup_string', '[| inputlookup nfl_host_list | rename SystemName as all.SystemName]');
        }
        // If unchecked
        else {
            unsubmitted_tokens.set('nfl_lookup_string', '');
        }

        // Only need to listen on master since all 3 charts depends on SystemName
        var master_search_id = mvc.Components.get("master").settings.get("managerid");
        var master_search = mvc.Components.getInstance(master_search_id);

        var after_initial = false;

        master_search.on("search:start", function(properties) {
            if(after_initial) {
                unsubmitted_tokens.unset("form.selected_system_name");
                submit_and_update_url();
            }

            after_initial = true;
        });
    });
});