web/activities/exercise/static-src/js/create/exercise.js

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export default class Exercise {
  constructor($form) {
    this.$element = $form;
    this.validator2 = null;
    this._setValidateRule();
    this._init();
    this._initEvent();

  }

  _init() {
    this._inItStep2form();
    this.fix();
  }

  _initEvent() {
    window.ltc.on('getActivity', (msg) => {
      window.ltc.emit('returnActivity', {valid:this.validator2.form(), data:window.ltc.getFormSerializeObject($('#step2-form'))});
    });

    window.ltc.on('getValidate', (msg) => {
      window.ltc.emit('returnValidate', {valid: this.validator2.form() });
    });
  }

  _inItStep2form() {
    let $step2_form = $('#step2-form');

    this.validator2 = $step2_form.validate({
      rules: {
        title: {
          required: true,
          maxlength: 50,
          trim: true,
          course_title: true,
        },
        itemCount: {
          required: true,
          positiveInteger: true,
          min: 1,
          max: 9999
        },
        range: {
          required: true,
        },
        difficulty: {
          required: true
        },
        'questionTypes[]': {
          required: true,
          remote: {
            url: $('[name="checkQuestion"]').data('checkUrl'),
            type: 'post',
            dataType: 'json',
            async: false,
            data: {
              itemCount: function () {
                return $('[name="itemCount"]').val();
              },
              range: function () {