Semantic-Org/Semantic-UI · error

No URL specified for api event

Error message

No URL specified for api event

What it means

This error is logged by the API module's query() function (api.js:216-218) when no URL can be determined for the request. The module calls get.templatedURL() to resolve the URL from settings.url, element data attributes (data-url, data-action), or the form's action attribute; if all of these are absent and the request is not mocked, the error fires and the request is aborted.

Source

Thrown at src/definitions/behaviors/api.js:1135

  // server error
  onError     : function(errorMessage, $module) {},

  // request aborted
  onAbort     : function(errorMessage, $module) {},

  successTest : false,

  // errors
  error : {
    beforeSend        : 'The before send function has aborted the request',
    error             : 'There was an error with your request',
    exitConditions    : 'API Request Aborted. Exit conditions met',
    JSONParse         : 'JSON could not be parsed during error handling',
    legacyParameters  : 'You are using legacy API success callback names',
    method            : 'The method you called is not defined',
    missingAction     : 'API action used but no url was defined',
    missingSerialize  : 'jquery-serialize-object is required to add form data to an existing data object',
    missingURL        : 'No URL specified for api event',
    noReturnedValue   : 'The beforeSend callback must return a settings object, beforeSend ignored.',
    noStorage         : 'Caching responses locally requires session storage',
    parseError        : 'There was an error parsing your request',
    requiredParameter : 'Missing a required URL parameter: ',
    statusMessage     : 'Server gave an error: ',
    timeout           : 'Your request timed out'
  },

  regExp  : {
    required : /\{\$*[A-z0-9]+\}/g,
    optional : /\{\/\$*[A-z0-9]+\}/g,
  },

  className: {
    loading : 'loading',
    error   : 'error'
  },

View on GitHub (pinned to 597843ab84)

Solutions

1. Provide a URL via settings: $('.el').api({ url: '/api/endpoint' }).
2. Add data-url='/api/endpoint' attribute to the element in HTML.
3. If using a form, ensure the form has an action attribute or provide url explicitly.
4. If testing without a server, set settings.mockResponse to bypass URL resolution.

Example fix

// before
$('.submit-btn').api({
  method: 'POST'
  // no url specified
});

// after
$('.submit-btn').api({
  method: 'POST',
  url: '/api/submit'
});

// Validate URL is configured before firing the API request
function fireApi($el) {
  var settings = $el.data('module-api-settings');
  var hasUrl = (settings && settings.url) || $el.data('url') || $el.data('action');
  if (!hasUrl) {
    console.error('No URL configured for API element:', $el);
    return;
  }
  $el.api('query');
}

// Check if a URL can be resolved for the element
function hasApiUrl($el) {
  return !!($el.data('url') || $el.data('action') || ($el.is('form') && $el.attr('action')));
}

When it happens

Trigger: Calling $('.el').api('query') without configuring settings.url, without data-url or data-action attributes on the element, and without settings.action pointing to an api map entry. Also when the element is not a form (so no form action attribute fallback) and settings.mockResponse is not set.

Common situations: Initializing the API module with event bindings but forgetting the url setting. Dynamic elements where data-url is set by JavaScript but not yet populated when the API call fires. Relying on form action attribute but the element is a button outside the form. Typographical errors in the url key.

Related errors

• API action used but no url was defined
• The before send function has aborted the request
• There was an error with your request
• The beforeSend callback must return a settings object, befor
• There was an error parsing your request

AI-assisted analysis of Semantic-Org/Semantic-UI@597843ab84 (2026-08-13). Data as JSON: /api/errors/38d967b6d5ddbd9e. Report an issue: GitHub.