Bootstrap is a free and open-source front-end development framework designed to facilitate the rapid and easy development of responsive websites and web applications. It offers a variety of customizable options for size, color, fonts, and layouts, along with components like dropdown menus and button groups. The framework enhances the overall efficiency and aesthetic of web development projects.

1. What Is
BootStrap?
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A free and open source front-end
development framework called
Bootstrap.
What Is BootStrap?
It is used to build websites and
web applications.

3. The main goal of this utility was to
build a tool that helps in the
development of website-related
applications fast, easy, convenient
and more responsive.
Its availability of many size, color,
font, and layout options for the
project was the main factor in its
inclusion in the Bootstrap
framework.
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4. Components
Of Bootstrap
Dropdown Menus
Dropdowns can be toggled, and
contextual overlays can be used to
show lists of links.
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5. For Example :
O/P :
Source : getbootstrap.com/
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6. Button groups
There are two basic options and
two additional variants.
Single Button Group
1.
Wrap a series of buttons with
.btn in .btn-group
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7. For Example :
O/P :
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8. 2. Multiple Button Groups
Combine sets of <div
class="btn-group"> into a
<div class="btn-toolbar">
for more complex components
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9. For Example :
O/P :
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