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onError

Description​

Fires when assert receives 'false' value, i.e. when assertion fails

onError: (errorMessage: string) => boolean;

Parameters​

  • errorMessage - (required) string - a string with an error from the assert method

Returns​

  • result - (boolean) - defines whether the default action of the event will be triggered (true) or canceled (false)

Example​

gantt.attachEvent("onError", function(errorMessage){
    gantt.message({
        text:"Error"
    });
    return true;
});

Details​

the event is blockable. Returning false will prevent the default behavior (showing error message in a red box in the top right)

Change log​

  • added in version 4.0