What is Bootstrap 4?

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                             Why we need to use Bootstrap ?

      Before introduce bootstrap all designer faces lots of problems because of making responsive design of website or mobile application. whenever design that website or application designer will try best for making responsive using css. but when mobile screen resolution  or versions are updated that time old designing does not work properly so sometime need redesign of web/app. bootstrap solve this cause and designer can use bootstrap for making responsive design which run properly in all the resolution screen mobile or PC.   

  Bootstrap has turned out to be one of the trendiest front-end frameworks in the whole world.Bootstrap is responsive, mobile-first, prevailing, and front-end framework, which is developed along with CSS, JavaScript, and HTML.

Bootstrap introduced many different versions.Here I'm discuss about Bootstrap-4 

Bootstrap 4 is latest , trendiest version of bootstrap.

Bootstrap has used LESS as its main CSS prepocessor, but for the new major release, the style rules will be refactored to Sass, which is much more popular among frontend developers.

responsive grid system that allows developers to target devices with different viewports.

             Major difference between bootstrap3 and bootstrap4

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