Fading out text in custom component

App Building
1

I made a custom component as an intermediate component for a logger. I need it to display notifications that fade-out in 4 seconds for instance. I need an example of a custom component that once has its model updated will display some text for the 4 seconds then it fades out with css. I tried to adapt this but having a hard time to make it work reactjs - How to wait and fade an element out? - Stack Overflow

2

managed to play longer with it


<style>
  @import url('https://rsms.me/inter/inter.css');
  html { font-family: 'Inter', sans-serif; }
  @supports (font-variation-settings: normal) {
    html { font-family: 'Inter var', sans-serif; }
  }

  * {
    font-family: 'Inter', sans-serif;
  }

  body {
    margin: 0;
  }

  #react {
    height: 100%;
    width: 100%;
  }

  .card {
    min-width: 0;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 4px;
    border: 1px solid #cccccc;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    background-color: var(--background-surface);
  }

  .title-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    line-height: 24px;
  }

  .title {
    font-size: 18px;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .docs-link {
    font-size: 12px;
    font-weight: 500;
    color: #b062bc;
    text-decoration: none;
  }

  .docs-link:hover {
    color: #9846a4;
  }

  .content {
    margin-top: 4px;
    font-size: 12px;
    line-height: 18px;
    font-weight: 400;
    color: #777777;
  }

  .button-container {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
  }

  .button {
    border: none;
    border-radius: 4px;
    padding: 8px 16px;
    font-weight: 500;
    font-size: 12px;
    cursor: pointer;
    outline: none;
    appearance: none;
    user-select: auto;
  }

  .button--main {
    background-color: #b062bc;
    color: #ffffff;
  }

  .button--main:hover {
    background-color: #9846a4;
  }

  .button--secondary {
    color: #b062bc;
    background-color: var(--background-surface);
    border: 1px solid #b062bc;
  }

  .button--secondary:hover {
    color: #9846a4;
    border: 1px solid #9846a4;
  }
  .alert-shown {
    opacity: 1;
    transition: all 250ms linear;
  }
  
  .alert-hidden {
    opacity: 0;
    transition: all 250ms linear 4.5s;
  }
</style>

<!-- You can add any HTML/CSS/JS here. UMD versions are required.
Keep in mind that Custom Components are sensitive to bundle sizes, so try using a
custom implementation when possible. -->
<script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>

<div id="react"></div>
<script type="text/babel">
function Fade(props) {
  const [isShowingAlert, setShowingAlert] = React.useState(null);

  React.useEffect(() => {
    setShowingAlert(true);
    setTimeout(() => {
      setShowingAlert(false)
      }, 200);
  }, [props.children]);
  
  return (
      <div>
        <div
          className={`alert alert-success ${isShowingAlert ? 'alert-shown' : 'alert-hidden'}`} >
          {props.children}
        </div>
      </div>
    );
}
</script>
<script type="text/babel">
  const MyCustomComponent = ({ triggerQuery, model, modelUpdate }) => (
    <div className="card">
      <div className="title-container">
        <div className="title">Custom component</div>
        <a href="https://docs.retool.com/apps/web/guides/components/custom" className="docs-link">View docs</a>
      </div>
      <div className="content">
        {/* The text below is dynamic and specified by the model. */}
        <Fade>{model.displayText}</Fade>
      </div>
      <div className="button-container">
        {/* This button updates the model when clicked. */}
        <button
          className="button button--secondary"
          onClick={() => modelUpdate({ displayText: 'The body of this text references "model.displayText", which just changed!' })}
        >
          Update model
        </button>
      </div>
    </div>
  )

  // This is the entrypoint for the React component.
  const ConnectedComponent = Retool.connectReactComponent(MyCustomComponent)
  const container = document.getElementById('react')
  const root = ReactDOM.createRoot(container)
  root.render(<ConnectedComponent />)
</script>
3

Thanks for sharing your solution back here so others can learn how to accomplish fading out text with a custom component! :sparkles: . Would you be open to sharing a screenshot or gif showing the behavior in action? :slight_smile: