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##The difference between Bootstrap3 and Bootstrap4
First introduce the official website connection of Bootstrap3 and 4;Bootstrap3 VS Bootstrap4.
Differences
Four types of grids for Bootstrap3:
Extra small (col-xs-) Suitable for mobile phones (
Small (col-sm-) Suitable For tablets (≥768px)
Medium (col-md-) For computers (≥992px)
Large (col-lg-) For widescreen computers (≥1200px)
Five types of grids for Bootstrap4:Extra small (col-) (
Small (col-sm-) (≥576px)
Medium (col-md-) (≥768px)
Large (col-lg-) (≥992px)
Extra large (col-xl-) (≥1200px )
Bootstrap4 FeaturesThe new grid layer is adapted to the mobile terminal;
Comprehensive introduction of ES6 new features (rewriting all JavaScript plug-ins) ;
css files have been reduced by at least 40%;
All documents are rewritten with Markdown editor;
Abandon support for IE8
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