Custom Tooltip Bootstrap 4

Customizing Tooltips in Bootstrap 4: A Comprehensive Guide

In this article, we will explore how to customize tooltips in Bootstrap 4, a popular front-end framework for building responsive web applications. We’ll dive into the world of CSS and JavaScript as we create our own unique tooltip experiences.

Understanding Boostrap’s Default Tooltip Behavior

Before diving deeper, it’s essential to understand how tooltips work in Bootstrap by default. To achieve this, let’s peek at an example:

<button type="button" data-toggle="tooltip" data-placement="top"
        title="Tooltip on top!">Top</button>

In the above code snippet, we’re creating a basic tooltip that appears when you hover over the button.

Customizing Tooltips with CSS

One of the most common ways to customize tooltips in Bootstrap 4 is by using custom CSS. To achieve this, let’s add some styles to our HTML element:

<button type="button" id="custom-tooltip"
        title="Customized Tooltip!">Hover Me</button>

    #custom-tooltip:hover:after {
        content: "This tooltip was customized with CSS!";
        position: absolute;
        top: 50%;
        left: 0;
        transform: translate(0, -100%);

In the above code snippet, we’ve targeted our custom tooltip button using its id and applied styles to it when it’s hovered over. This approach allows us to control varoius aspects of our tooltips’ appearance.

JavaScript-Based Customizations

To take things further, let’s leverage some JavaScript magic! Bootstrap provides a way for you to customize your tooltips programmatically:

<button type="button" id="js-custom-tooltip"
        title="JS-Enhanced Tooltip">Hover and See!</button>

    const tooltipButton = document.getElementById('js-custom-tooltip');

    tooltipButton.addEventListener("mouseover", () => {
      // Display a custom message for 3 seconds
      let tooltipText = 'This was added programmatically with JavaScript!';

      setTimeout(() => {
        if (tooltipButton:hover) { // Check the element still has hover effect
          window.location.href = '/url-of-actual-tooltip-content'; 
       }, 3000);

In this example, we’re targeting our button using its id and attaching an event listener for mouseover. This allows us to create a customized tooltip experience that persists beyond just displaying text. You can also customize your tooltips based on mouse position or other conditions.

Using Bootstrap 4’s Utility Classes

Another powerful way to personalize your tooltips is by utilizing Bootstrap’s utility classes:

<button type="button" id="util-tooltip"
        title="Util-Style Tooltip">Customized tooltip with a flair!</button>

    #util-tooltip {
      font-size: .8em;

In the above code snippet, we’re using Bootstrap’s font-size utility class to adjust our button’s text size.

Summary and Final Thoughts

Throughout this article, you’ve learned how to create unique and engaging tooltips experiences in your web application with Bootstrap 4. By mastering custom CSS styling, leveraging JavaScript programming concepts, or utilizing the built-in utility classes provided by Bootstrap itself, there are countless possibilities for customization.