dianping/cat · error · Error

prompt requires a title

Error message

prompt requires a title

What it means

bootbox.prompt validates that a title is present before rendering a prompt. Because prompt dialogs have no message field, the title doubles as the prompt's descriptive text ('Please enter your name:'), so an empty or missing title leaves the dialog with no visible question — hence a hard requirement.

Source

Thrown at cat-home/src/main/webapp/assets/js/uncompressed/bootbox.js:436

          // we assume that checkboxes are always multiple,
          // hence we default to an empty array
          value = [];

          each(checkedItems, function(_, item) {
            value.push($(item).val());
          });
          break;
      }

      return options.callback(value);
    };

    options.show = false;

    // prompt specific validation
    if (!options.title) {
      throw new Error("prompt requires a title");
    }

    if (!$.isFunction(options.callback)) {
      throw new Error("prompt requires a callback");
    }

    if (!templates.inputs[options.inputType]) {
      throw new Error("invalid prompt type");
    }

    // create the input based on the supplied type
    input = $(templates.inputs[options.inputType]);

    switch (options.inputType) {
      case "text":
      case "textarea":
      case "email":
      case "date":

View on GitHub (pinned to e815e74d4c)

Solutions

1. Pass the title as the first argument: bootbox.prompt('Enter your name:', function(result){ ... });
2. Or use the options form with title: bootbox.prompt({title: 'Enter your name:', callback: fn, value: defaultValue}).
3. Default the title when built dynamically: {title: question || 'Enter a value:'}.

Example fix

// before
bootbox.prompt(function (name) { if (name) saveName(name); });

// after
bootbox.prompt('Enter your name:', function (name) { if (name) saveName(name); });

bootbox.prompt(question || 'Please enter a value:', callback);
// or options form:
bootbox.prompt({ title: question || 'Enter a value:', callback: callback });

function hasPromptTitle(o) {
  return !!o && !!o.title;
}

When it happens

Trigger: bootbox.prompt(callback) (forgot the title string); bootbox.prompt({callback: fn}) with no title; title built from a variable that is '' or undefined (empty model field, missing i18n key).

Common situations: Assuming prompt's first argument is the default value or the placeholder; migrating from a different prompt API where the question goes in message; localizing dialogs and the title key is absent for one locale.

Related errors

• prompt requires a callback
• Please specify a message
• confirm requires a callback
• invalid prompt type
• prompt with select requires options

AI-assisted analysis of dianping/cat@e815e74d4c (2026-08-14). Data as JSON: /api/errors/761f39a0095a69f7. Report an issue: GitHub.