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Asked: 2026-06-12T01:06:53+00:00

I have a javascript code that creates a simple clock. define([ dojo/_base/declare, dojo/dom, dojo/date/locale,

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I have a javascript code that creates a simple clock.

define([
    "dojo/_base/declare",
    "dojo/dom",
    "dojo/date/locale",
    "dojo/_base/event"
], 
function(declare, dom, locale, event) {
    return declare([], {
        ...
        ...
        createClock : function() {
            html_time = dom.byId("time");
            window.setInterval(this.tick(), 1000);
        }
    });
});

JS code is working correctly! Also, I have a html code:

<body>
    <script>
        require([ "gui/common/Clock"
        ],
        function(Clock) {
            var clock = new Clock();
            clock.createClock();
        });
    </script>
    Current time: <span id="time"></span>
    ...

But if I run the code in the browser, then I get an error:

Error: useless setInterval call (missing quotes around argument?)
[Break On This Error]   

window.setInterval(this.tick(), 1000);

In the browser the time appears, but it does not tick. Anybody can explain what is my problem?

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1 Answer

  1. Editorial Team

    Do not execute the method: window.setInterval(this.tick, 1000);

    Also to execute tick in this scope, use lang.hitch as of dojo/_base/lang module:

    window.setInterval(lang.hitch(this, "tick"), 1000);

    You can find some inspiration in my answer to How to do something while a dojo xhr request is waiting or loading.

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