Implementing ___ headers can help in leveraging browser caching for performance.
- Cache-Control
- Expires
- Last-Modified
- ETag
The Cache-Control header is commonly used to control caching behavior. By setting appropriate values, such as max-age, you can instruct browsers to cache resources, improving performance by reducing the need to download them repeatedly.
Explain how event delegation is utilized in Bootstrap Tooltips on dynamically created elements.
- Utilizing the data-toggle attribute on the dynamically created elements
- Binding the tooltip events to a static parent container
- Directly attaching tooltip events to each dynamic element
- Utilizing the data-trigger attribute on the parent container
Event delegation in Bootstrap Tooltips involves binding the tooltip events to a static parent container. This allows dynamically created elements within the container to inherit the tooltip behavior without individually attaching events to each element.
What role does asynchronous or deferred loading of Bootstrap JavaScript files play in page load efficiency?
- Improves page load efficiency by loading scripts in parallel
- Degrades page load efficiency by delaying script execution
- No impact on page load efficiency
- Optimizes script execution order
Asynchronous or deferred loading of Bootstrap JavaScript files allows scripts to load independently, improving page load efficiency by loading in parallel. This prevents scripts from blocking each other, enhancing overall performance.
The Bootstrap class 'navbar-___' can be used to change the navbar's theme.
- theme
- color
- style
- bg
The class 'navbar-bg' in Bootstrap is used to change the background color of the navbar. Changing this class allows you to modify the theme of the navbar.
Integrating Bootstrap with a ___ can streamline the development and maintenance process.
- Task Runner
- CMS
- Version Control System
- Database
Integrating Bootstrap with a task runner like Gulp or Grunt can automate tasks, optimize assets, and enhance the development workflow.
In Bootstrap cards, the 'card-header ___' class is used for adding header content.
- header-content
- title
- heading
- card-title
The correct option is card-title. The 'card-header' class is used to define the header section of a Bootstrap card, and 'card-title' is specifically used for adding a title or heading to the card header.
Creating a dark mode theme in Bootstrap involves customizing the '___' SASS variables.
- $primary-dark
- $dark-mode
- $theme-dark
- $bg-dark
The correct SASS variables to customize for dark mode are '$theme-dark'. These variables control the dark mode styling across various components in Bootstrap.
For older browsers, implementing CSS3 features requires the use of '___' or similar tools.
- Modernizr
- Polyfills
- Shims
- Transpilers
Older browsers lack support for CSS3, so using polyfills to fill the feature gaps is essential. Polyfills enable browsers to mimic the behavior of newer features.
If you need to implement a dynamic form submission within a Bootstrap modal using JavaScript, what steps would you follow?
- Use AJAX to submit the form asynchronously, handle form submission events, update modal content dynamically.
- Attach a form submission listener, use Bootstrap's modal events, fetch form data using JavaScript, update modal content.
- Embed an iframe within the modal to handle form submission, utilize Bootstrap's built-in form submission methods.
- Use an external library for form submission, trigger modal events on form submission, update modal content based on the form data.
In this scenario, you would attach a form submission listener to the form inside the modal. Utilize Bootstrap's modal events, fetch form data using JavaScript, and update modal content dynamically.
Browsers that do not support HTML5 elements can be made compatible using '___'.
- HTML5shiv
- Normalize.css
- Modernizr
- Reset.css
The correct answer is HTML5shiv. HTML5shiv is a JavaScript library that enables support for HTML5 elements in older browsers. Including HTML5shiv in your project can help ensure compatibility and consistent rendering of HTML5 elements across various browsers, particularly those that do not natively support these elements.