Semantic-Org/Semantic-UI · warning

The method you called is not defined

Error message

The method you called is not defined

What it means

invoke() could not resolve an accordion behavior method and logged it via console.error prefixed 'Accordion:'. Valid accordion behaviors include 'open', 'close', 'toggle' (each optionally with an index), and 'destroy'.

Source

Thrown at src/definitions/modules/accordion.js:588

  exclusive       : true,  // whether a single accordion content panel should be open at once
  collapsible     : true,  // whether accordion content can be closed
  closeNested     : false, // whether nested content should be closed when a panel is closed
  animateChildren : true,  // whether children opacity should be animated

  duration        : 350, // duration of animation
  easing          : 'easeOutQuad', // easing equation for animation

  onOpening       : function(){}, // callback before open animation
  onClosing       : function(){}, // callback before closing animation
  onChanging      : function(){}, // callback before closing or opening animation

  onOpen          : function(){}, // callback after open animation
  onClose         : function(){}, // callback after closing animation
  onChange        : function(){}, // callback after closing or opening animation

  error: {
    method : 'The method you called is not defined'
  },

  className   : {
    active    : 'active',
    animating : 'animating'
  },

  selector    : {
    accordion : '.accordion',
    title     : '.title',
    trigger   : '.title',
    content   : '.content'
  }

};

// Adds easing
$.extend( $.easing, {

View on GitHub (pinned to 597843ab84)

Solutions

1. Check the method name against the accordion behavior API ('open', 'close', 'toggle' with an optional index, 'destroy')
2. Confirm the index argument is an integer when using 'open'/'close'/'toggle'

Example fix

// before
$('.ui.accordion').accordion('opne', 1);
// after
$('.ui.accordion').accordion('open', 1);

var ACCORDION_BEHAVIORS = ['open','close','toggle','destroy'];
function isAccordionBehavior(name, idx) {
  return ACCORDION_BEHAVIORS.indexOf(name) !== -1
      && (idx === undefined || Number.isInteger(idx));
}
if (isAccordionBehavior(method, index)) {
  $('.ui.accordion').accordion(method, index);
}

function isAccordionMethod(name) {
  return /^(open|close|toggle|destroy)$/.test(name);
}

When it happens

Trigger: A typo such as $('.ui.accordion').accordion('opne', 1), or a method that does not exist on the accordion module.

Common situations: Version skew where a method was renamed; wrong method name copied from memory.

Related errors

• The method you called is not defined
• The method you called is not defined.
• {name} cannot contain "{ruleValue}"
• The method you called is not defined.
• The method you called is not defined.

AI-assisted analysis of Semantic-Org/Semantic-UI@597843ab84 (2026-08-13). Data as JSON: /api/errors/000eaf1cf514ccda. Report an issue: GitHub.