octobercms/october · error · Error

Snackbar options.action.callback must be a function

Error message

Snackbar options.action.callback must be a function

What it means

Error "Snackbar options.action.callback must be a function" thrown in octobercms/october.

Source

Thrown at modules/backend/assets/js/october/october.snackbar.js:60

                    throw new Error('Snackbar options.timeout cannot be lower than 2000');
                }

                if (options.timeout > 8000) {
                    throw new Error('Snackbar options.timeout cannot be higher than 8000');
                }
            }

            if (options.action !== undefined) {
                if (typeof options.action !== 'object') {
                    throw new Error('Snackbar options.action must be an object');
                }

                if (typeof options.action.label !== 'string') {
                    throw new Error('Snackbar options.action.label must be a string');
                }

                if (typeof options.action.callback !== 'function') {
                    throw new Error('Snackbar options.action.callback must be a function');
                }
            }
        }

        function runQueue() {
            if (displayedMessage !== null) {
                return;
            }

            var parameters = queue.shift();
            if (parameters === undefined) {
                return;
            }

            buildSnackbar(parameters);
        }

        function makeUniqueId() {

View on GitHub (pinned to b608633a7e)

When it happens

Trigger: Thrown at modules/backend/assets/js/october/october.snackbar.js:60 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of octobercms/october@b608633a7e (2026-08-21). Data as JSON: /api/errors/a344841cd43749ff. Report an issue: GitHub.