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Bootstrap 4 Alert Tutorial

Alert refers to a state of being watchful.

Bootstrap 4 provides the .alert class to provide an easy way to create predefined alert messages. The .alert class will be followed by one of the four contextual classes .alert-success, .alert-info, .alert-warning,.alert-danger, .alert-primary, .alert-secondary, .alert-light or .alert-dark.

Bootstrap 4 Alert Example:

<!DOCTYPE html>
<html lang="en">
  <title>Bootstrap 4 Alerts Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="">
  <script src=""></script>
  <script src=""></script>
  <script src=""></script>
<div class="container">
  <h2>Bootstrap 4 Alerts Example</h2>
  <div class="alert alert-success">
    <strong>Success!</strong> This alert box could indicate a successful or positive action.
  <div class="alert alert-info">
    <strong>Info!</strong> This alert box could indicate a neutral informative change or action.
  <div class="alert alert-warning">
    <strong>Warning!</strong> This alert box could indicate a warning that might need attention.
  <div class="alert alert-danger">
    <strong>Danger!</strong> This alert box could indicate a dangerous or potentially negative action.
  <div class="alert alert-primary">
    <strong>Primary!</strong> Indicates an important action.
  <div class="alert alert-secondary">
    <strong>Secondary!</strong> Indicates a slightly less important action.
  <div class="alert alert-dark">
    <strong>Dark!</strong> Dark grey alert.
  <div class="alert alert-light">
    <strong>Light!</strong> Light grey alert.
Try it:

Bootstrap 4 Alerts Example on

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