Just include this tag in your HTML header and you are good to go:

<script src="https://cdn.jsdelivr.net/gh/Sv443/jslib@1/jslib.js"
        integrity="sha512-jTdPVbIEUKKGdPFXb9+713FOD/Twcf9h9MeeKF/psBbpSzseYH8KmJuCsQ3qQHWQcA93UVQGG51651pB/h44ew=="
        crossorigin="anonymous"></script>

To install the npm version which is more oriented towards backend JavaScript, please click here

If you don't want to have a watermark in your console or if there are multiple iframes on your page that use JSLib (which will log multiple watermarks to the console), you can deactivate it by adding the following property to the script tag:

data-jsl_disablewatermark="true"