The preferred way to install this extension is through composer.

Either run

$ composer require morovinger/yii2-js-zip:*

or add

"morovinger/yii2-js-zip": "*"

to the require section of your composer.json file.

Just register asset in a required view

use morovinger\yii2jszip;
yii2jszip\JSZipAsset::register($this);