4 Important Topics to learn Bootstrap

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Classroom | Online

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Course Description :

1.  Grid System :   Most Important Topic of Bootstrap is Grid, Bootstrap have 12 Column Grid System Rule which we have to follow,  It has predefined classes (col-lg-4, col-md-6, col-sm-5, col-12) etc.  for devices such as lg for large device , md for medium device, sm for small device etc, by using these grid system we can easily manage boxes in all devices.

span 1 span 1 span 1 span 1 span 1 span 1 span 1 span 1 span 1 span 1 span 1 span 1
 span 4  span 4  span 4
span 4 span 8
span 6 span 6
span 12


2.  Bootstrap4 Mostly Used Components and Classes :  

Bootstrap4   have number of useful components and classes , which helps to design webpage quickly with attractive features such as modal box, tab panel and marging , padding classes etc. Some of these are following :

1. Modal Box

2. Tab panel (In Bootstrap4 Navs , Dynamic Toggleable Tabs)

3. Carousel

4. Responsive Navbar (Collapsible Navbar)

5. Bootstrap4 Card

6. Margin and Padding Classes (e.g. mt-2,mb-3,py-3)

7.  Bootstrap Buttons and Alerts  (very useful for web application)

3.  Display Utilities :  Bootstrap Display utilites is useful when we have to hide or show any content in particular device such as a div , we want to hide in mobile , we will use  (d-none d-sm-block), Here is the table for display utilities :

Screen SizeClass
Hidden on all .d-none
Hidden only on xs .d-none .d-sm-block
Hidden only on sm .d-sm-none .d-md-block
Hidden only on md .d-md-none .d-lg-block
Hidden only on lg .d-lg-none .d-xl-block
Hidden only on xl .d-xl-none
Visible on all .d-block
Visible only on xs .d-block .d-sm-none
Visible only on sm .d-none .d-sm-block .d-md-none
Visible only on md .d-none .d-md-block .d-lg-none
Visible only on lg .d-none .d-lg-block .d-xl-none
Visible only on xl .d-none .d-xl-block

4. Media Query : Media Query plays an important role in responsive web deisgn. It helps us to manage our designing elements  in different different devices . e.g we have to manage font size in mobiles, we have to reduce margin and padding of elements etc  problems related to design.

Syntax :  @media (max-width: 767px)

In above syntax we wrote 767px ,In Media query there are following size for device :

Vertical Sizes of Mobile Device

1. 320px (for iphone or 4.5 inch to 5.inch phones)

2. 360px (for galaxy s5 or 5 inch to 5.5 inch phones)

3. 414PX (for google nexus or 5.5 inch to 6 inch phones)

Horizontal Sizes of Mobile Device

1. 568px (horizontal view of iphone or 4.5 inch to 5 inch phones)

2. 640px (for galaxy s5 or 5 inch to 5.5 inch)

3. 767px (for  google nexus or 5.5 inch to 6 inch)

Ipad and Ipad pro Size

1. 768px to 1024

2. 1024 to 1366px

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