mixins js trigger twice

[mrtuvn]

Preconditions and environment

• Magento version 2.3.7+
  Test from blank theme

Steps to reproduce

1/ Create file requirejs-config.js at root folder theme
example: app/design/frontend/Magento/blank/requirejs-config.js

var config = {
    config: {
        mixins: {
            'mage/loader': {
                'js/mage/loader-mixin': true
            }
        }
    }
};

2/ Create file mixin in web/js/mage/loader-mixin.js

/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

define([
    'jquery',
    'mage/template',
    'jquery-ui-modules/widget',
    'mage/translate'
], function ($, mageTemplate) {
    'use strict';

    let mixin = {
        options: {
            icon: '',
            texts: {
                loaderText: $.mage.__('Please wait...'),
                imgAlt: $.mage.__('Loading...'),
                mainText: $.mage.__('We are processing your payment'),
                placeOrderText: $.mage.__('Payment is currently being processed by the payment partner. This may take up to 60 second. Please wait a moment.')
            },
            template:

                '<div class="c-loader-with-text">' +
                '<div class="loading-mask" data-role="loader">' +
                '<div class="loader">' +
                '<img alt="<%- data.texts.imgAlt %>" src="<%- data.icon %>"/>' +
                '<div class="loader-text" style="display: none">' +
                '<strong class="main-text"><%- data.texts.mainText %></strong>' +
                '<span class="sub-text"><%- data.texts.placeOrderText %></span>' +
                '</div>' +
                '</div>' +
                '</div>' +
                '</div>'
        },

        /**
         * Render loader
         * @protected
         */
        _render: function () {
            var html;
            console.log(html);
            if (!this.spinnerTemplate) {
                this.spinnerTemplate = mageTemplate(this.options.template);

                html = $(this.spinnerTemplate({
                    data: this.options
                }));

                html.prependTo(this.element);

                this.spinner = html;
            }
        },
    };

    return function (targetWidget) {
        $.widget('mage.loader', $.mage.loader, mixin);

        return $.mage.loader;
    };
});

3/ Re-deploy static content

4/ Trigger loader from frontend
Go to homepage
open devtool example Chrome browser
run code

jQuery('body').trigger('processStart');

Expected result

Only trigger one html

Actual result

mixin js file run/executed correct but it triggered twice
html loader appended show twice in DOM

Additional information

No response

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @mrtuvn. Thank you for your report.
To speed up processing of this issue, make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, Add a comment to the issue:

• @magento give me 2.4-develop instance - upcoming 2.4.x release
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[m2-assistant]

Hi @engcom-Hotel. Thank you for working on this issue.
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• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).
• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue.
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• 4. Verify that the issue is reproducible on 2.4-develop branch
  Details

  - Add the comment @magento give me 2.4-develop instance to deploy test instance on Magento infrastructure.
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[engcom-Hotel]

Hello @mrtuvn,

Thanks for the reporting and collaboration!

We have tried to reproduce this issue in Magento 2.4-develop branch and the issue is still reproducible for us. Please have a look at the below screenshot for reference:

Hence confirming the issue.

Thanks

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/AC-8009 is successfully created for this GitHub issue.