Creating Customizable React Tooltips

Introduction

In this lab, we will learn how to create a tooltip component in React using state and event handlers. Tooltips are small pop-up boxes that appear when the user hovers over an element, providing additional information. By the end of the lab, you will be able to create customizable tooltips that can be easily integrated into your React applications.

Tooltip

index.html and script.js have already been provided in the VM. In general, you only need to add code to script.js and style.css.

Here's a clearer, more concise, and more coherent version of the content:

This code creates a tooltip component. To use it, do the following:

1. Use the useState() hook to create the show variable and set it to false.
2. Render a container element that contains the tooltip element and the children passed to the component.
3. Handle the onMouseEnter and onMouseLeave events by toggling the className of the tooltip, which is controlled by the show variable.

Here's the code for the tooltip component:

.tooltip-container {
  position: relative;
}

.tooltip-box {
  position: absolute;
  top: calc(100% + 5px);
  display: none;
  padding: 5px;
  border-radius: 5px;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
}

.tooltip-box.visible {
  display: block;
}

.tooltip-arrow {
  position: absolute;
  top: -10px;
  left: 50%;
  border-width: 5px;
  border-style: solid;
  border-color: transparent transparent rgba(0, 0, 0, 0.7) transparent;
}

const Tooltip = ({ children, text, ...rest }) => {
  const [show, setShow] = React.useState(false);

  return (
    <div className="tooltip-container">
      <div className={show ? "tooltip-box visible" : "tooltip-box"}>
        {text}
        <span className="tooltip-arrow" />
      </div>
      <div
        onMouseEnter={() => setShow(true)}
        onMouseLeave={() => setShow(false)}
        {...rest}
      >
        {children}
      </div>
    </div>
  );
};

To use the tooltip component, call ReactDOM.createRoot() with the following code:

ReactDOM.createRoot(document.getElementById("root")).render(
  <Tooltip text="Simple tooltip">
    <button>Hover me!</button>
  </Tooltip>
);

Please click on 'Go Live' in the bottom right corner to run the web service on port 8080. Then, you can refresh the Web 8080 Tab to preview the web page.

Summary

Congratulations! You have completed the Tooltip lab. You can practice more labs in LabEx to improve your skills.