How to include an external Javascript file in the angle?

In my old projects I was able to take advantage of a lot of my css codes when I started to create my projects in Angular, the research knew of a file called styles.css that is inside the src folder and inside it the app folder. / p>

This part was easy, what a challenge and how to include my old javascript files

See how I linked my javascript files

<script src="assets/js/plugins.js"></script>
<script src="assets/js/main.js"></script>


<script src="assets/js/lib/chart-js/Chart.bundle.js"></script>
<script src="assets/js/dashboard.js"></script>
<script src="assets/js/widgets.js"></script>
<script src="assets/js/lib/vector-map/jquery.vmap.js"></script>
<script src="assets/js/lib/vector-map/jquery.vmap.min.js"></script>
<script src="assets/js/lib/vector-map/jquery.vmap.sampledata.js"></script>
<script src="assets/js/lib/vector-map/country/jquery.vmap.world.js"></script>

I searched my angula project and did not find a way to include them in the project, could someone kindly explain me to include them in my project?

I tried to put it like this;

<script src="js/teste.js" type="text/javascript"></script>

I placed the test.js file inside the src folder and inside the src folder I created a js folder and put it in there, but it did not resolve and generated an error in the browser console