This way any changes you make don't impact the Bootstrap source, which makes changes or upgrading Bootstrap later much easier.ġ- Consider Bootstrap's SASS folder structure, alongside your custom.scss. |- \bootstrapĢ- In your custom.scss, import the Bootstrap files that are needed for the overrides. In some cases, with more complex cutomizations, you may also need the functions, mixins, and other Bootstrap files.). * make changes to the !default Bootstrap variables */ * import the necessary Bootstrap files "bootstrap/variables" It's important to import Bootstrap after the changes. * finally, import Bootstrap to set the changes! "bootstrap" Ģa ( optional) - Also, you can extend existing Bootstrap classes after the "bootstrap" to create new custom classes. row-dark class that extends (inherits from) the Bootstrap. row class and then add a background-color. * create new custom classes from existing classes */ģ- Compile the SASS (node-sass, gulp-sass, webpack/NPM, etc.). The CSS output will contain the overrides! Don't forget to check the includePaths if your fail. For a full list of variables you can override, see the variables.scss file. There are also these global variables.ġ_ First, when the custom.scss file is processed using SASS, the !default values are defined in the bootstrap/variables.scss.Ģ_ Next, our custom values are set, which will override any of the variables that had !default values set in bootstrap/variables.scss.ģ_ Finally, Bootstrap is imported ( "bootstrap") which enables the SASS processor (A.K.A. How to get 15 columns in Bootstrap 4 in SASS CSS? compiler) to generate all the appropriate CSS using both the Bootstrap defaults and the custom overrides.įor those that don't know SASS, try this tool that I made.
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