next-csrf/example/node_modules/ally.js/amd/util/toggle-class.js

CSRF mitigation library for Next.js

(/* istanbul ignore next */ function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(['exports'], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports);
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports);
    global.toggleClass = mod.exports;
  }
})(this, function (exports) {
  'use strict';

  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  exports.toggleClass = toggleClass;
  exports.removeClass = removeClass;
  exports.addClass = addClass;
  //
  // This util allows to easily add, remove or toggle classes.
  //
  // Using it is neccessary as IE 9 doesn't support element classList
  // and IE 11 doesn't support classList for SVG elements
  // see also https://developer.mozilla.org/en/docs/Web/API/Element/classList
  //
  // This file is a replacement for domtokenlist because of
  // https://github.com/medialize/ally.js/issues/147
  //
  // Usage:
  //
  // toggleClass(div, 'demo'); // Toggles the class `demo`
  // toggleClass(div, 'demo', true); // Adds the class `demo`
  // toggleClass(div, 'demo', false); // removes the class `demo`
  //
  // removeClass(div, 'demo');
  // addClass(div, 'demo');
  //

  /**
   * Extract an array of all classNames of the given DOM or SVG node
   */
  function getClassNames(element) {
    var className = element.getAttribute && element.getAttribute('class') || '';
    return className === '' ? [] : className.split(' ');
  }

  function toggleClass(element, className, force) {
    var classNames = getClassNames(element);
    var idx = classNames.indexOf(className);
    var hasClass = idx !== -1;
    var shouldHaveClass = force !== undefined ? force : !hasClass;
    // Break if classes are already set/removed
    if (shouldHaveClass === hasClass) {
      return;
    }
    // Remove class
    if (!shouldHaveClass) {
      classNames.splice(idx, 1);
    }
    // Add class
    if (shouldHaveClass) {
      classNames.push(className);
    }
    element.setAttribute('class', classNames.join(' '));
  }

  function removeClass(element, className) {
    return toggleClass(element, className, false);
  }

  function addClass(element, className) {
    return toggleClass(element, className, true);
  }
});
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