Callback not firing until user clicks anywhere

Dash Python
1

Hello,
We are developing a complex dataviz app using dash.
I found that some callbacks are not fired even though a property in its inputs has been changed by another callback.
Then if I click anywhere on the page (not especially on a control), it fires the callback.
While waiting for the click, the browser’s tab title displays “Updating…”, like during a callback.

Has anyone seen a similar behavior ?

Thank you.

1 Like
2

HI @VictorCov, I did not notice something like that up to now. For further help it’d be good to post your corresponding code snippet.

3

Hello AIMPED,
Thank you for your answer.
Our app is very complex and I tried making a small example but it didn’t reproduce the problem.

I found that while the app is stuck, waiting for a click, it is stuck in this code in the file dash_renderer.v2_9_2m1680265169.dev.js:

{
	key: "componentDidMount",
	value: function componentDidMount() {
		var _this$props = this.props
			, dispatch = _this$props.dispatch
                	, reloadRequest = _this$props.reloadRequest;
                var _this$state = this.state
                	, disabled = _this$state.disabled
                	, interval = _this$state.interval;
                if (!disabled && !this.state.intervalId) {
                	var intervalId = window.setInterval(function() {
                        	// Prevent requests from piling up - reloading can take
                        	// many seconds (10-30) and the interval is 3s by default
                        	if (reloadRequest.status !== 'loading') {
                        		dispatch((0,
                                	_actions_api__WEBPACK_IMPORTED_MODULE_4__["default"])('_reload-hash', 'GET', 'reloadRequest'));
                                }
			}, interval);
			this.setState({
				intervalId: intervalId
			});
		}
	}
}

More specifically, looping at the following lines:

if (reloadRequest.status !== 'loading') {
	dispatch((0,
       	_actions_api__WEBPACK_IMPORTED_MODULE_4__["default"])('_reload-hash', 'GET', 'reloadRequest'));
}

What could be the cause of this behavior?
Thank you.