wikimedia/mediawiki-extensions-UploadWizard

/*
 * This script is run on [[Special:UploadWizard]].
 * Configures and creates an interface for uploading files in multiple steps, hence "wizard".
 *
 * Tries to transform Javascript globals dumped on us by the SpecialUploadWizard.php into a more
 * compact configuration, owned by the UploadWizard created.
 */

// Create UploadWizard
( function () {

    function isCompatible() {
        return !!(
            window.FileReader &&
            window.FormData &&
            window.File &&
            window.File.prototype.slice
        );
    }

    /**
     * @class
     */
    mw.UploadWizardPage = function () {

        var uploadWizard,
            config = mw.config.get( 'UploadWizardConfig' );

        // Default configuration value that cannot be removed
        config.maxUploads = config.maxUploads || 10;

        // Remove the initial spinner
        // eslint-disable-next-line no-jquery/no-global-selector
        $( '.mwe-first-spinner' ).remove();

        // eslint-disable-next-line no-jquery/no-global-selector
        if ( $( '#upload-wizard' ).length === 0 ) {
            mw.log( 'UploadWizard is disabled, nothing to do.' );
            return;
        }

        if ( !isCompatible() ) {
            // Display the same error message as for grade-C browsers
            // eslint-disable-next-line no-jquery/no-global-selector
            $( '.mwe-upwiz-unavailable' ).show();
            return;
        }

        uploadWizard = new mw.UploadWizard( config );
        uploadWizard.createInterface( '#upload-wizard' );
    };

    $( () => {
        // show page.
        mw.UploadWizardPage();
    } );

}() );