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							- let Declaration = require('../declaration')
 
- class BlockLogical extends Declaration {
 
-   /**
 
-    * Return property name by spec
 
-    */
 
-   normalize(prop) {
 
-     if (prop.includes('-before')) {
 
-       return prop.replace('-before', '-block-start')
 
-     }
 
-     return prop.replace('-after', '-block-end')
 
-   }
 
-   /**
 
-    * Use old syntax for -moz- and -webkit-
 
-    */
 
-   prefixed(prop, prefix) {
 
-     if (prop.includes('-start')) {
 
-       return prefix + prop.replace('-block-start', '-before')
 
-     }
 
-     return prefix + prop.replace('-block-end', '-after')
 
-   }
 
- }
 
- BlockLogical.names = [
 
-   'border-block-start',
 
-   'border-block-end',
 
-   'margin-block-start',
 
-   'margin-block-end',
 
-   'padding-block-start',
 
-   'padding-block-end',
 
-   'border-before',
 
-   'border-after',
 
-   'margin-before',
 
-   'margin-after',
 
-   'padding-before',
 
-   'padding-after'
 
- ]
 
- module.exports = BlockLogical
 
 
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