Chart js in Weblfow

At the beginning I would like to say that I am not a coder. I wanted to implement a chart.js into my website but I have a problem. I can’t add label into the chart it stays on Y axis. Here is my code I will be very grateful for any help. You can check on W3Schools Tryit Editor. And i wonder if this a problem with downloading a plugin from chart.js?

Chart.js Example .chartjs-title { font-family: Roboto; }
#inputValue {
  width: 200px;
  height: 100px;
  font-size: 20px;

#inputContainer {
  display: flex;
  justify-content: center;
  align-items: center;

Maybe these resources will help: