Answers for "bootstrap margin left 0 example"

laravel clear cache

php artisan cache:clear
php artisan route:clear
php artisan config:clear 
php artisan view:clear

laravel disable config cache

php artisan cache:clear - Flush the application cache

php artisan config:cache - Create a cache file for faster configuration loading. This is for configuration cache. This command will clear the configuration cache before it creates. More details

php artisan config:clear - Remove the configuration cache file

clear laravel cache

php artisan view:clear 
php artisan cache:clear
php artisan route:clear
php artisan config:clear
php artisan optimize

bootstrap Margin and padding

Use the margin and padding spacing utilities to control how elements and 
components are spaced and sized. Bootstrap 4 includes a five-level scale for
spacing utilities, based on a 1rem value default $spacer variable. Choose
values for all viewports (e.g., .mr-3 for margin-right: 1rem), or pick
responsive variants to target specific viewports (e.g., .mr-md-3 for 
margin-right: 1rem starting at the md breakpoint).

<div class="my-0 bg-warning">Margin Y 0</div>
  <div class="my-1 bg-warning">Margin Y 1</div>
  <div class="my-2 bg-warning">Margin Y 2</div>
  <div class="my-3 bg-warning">Margin Y 3</div>
  <div class="my-4 bg-warning">Margin Y 4</div>
  <div class="my-5 bg-warning">Margin Y 5</div>
  <div class="my-auto bg-warning">Margin Y Auto</div>