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							- let Declaration = require('../declaration')
 
- class BreakProps extends Declaration {
 
-   /**
 
-    * Don’t prefix some values
 
-    */
 
-   insert(decl, prefix, prefixes) {
 
-     if (decl.prop !== 'break-inside') {
 
-       return super.insert(decl, prefix, prefixes)
 
-     }
 
-     if (/region/i.test(decl.value) || /page/i.test(decl.value)) {
 
-       return undefined
 
-     }
 
-     return super.insert(decl, prefix, prefixes)
 
-   }
 
-   /**
 
-    * Return property name by final spec
 
-    */
 
-   normalize(prop) {
 
-     if (prop.includes('inside')) {
 
-       return 'break-inside'
 
-     }
 
-     if (prop.includes('before')) {
 
-       return 'break-before'
 
-     }
 
-     return 'break-after'
 
-   }
 
-   /**
 
-    * Change name for -webkit- and -moz- prefix
 
-    */
 
-   prefixed(prop, prefix) {
 
-     return `${prefix}column-${prop}`
 
-   }
 
-   /**
 
-    * Change prefixed value for avoid-column and avoid-page
 
-    */
 
-   set(decl, prefix) {
 
-     if (
 
-       (decl.prop === 'break-inside' && decl.value === 'avoid-column') ||
 
-       decl.value === 'avoid-page'
 
-     ) {
 
-       decl.value = 'avoid'
 
-     }
 
-     return super.set(decl, prefix)
 
-   }
 
- }
 
- BreakProps.names = [
 
-   'break-inside',
 
-   'page-break-inside',
 
-   'column-break-inside',
 
-   'break-before',
 
-   'page-break-before',
 
-   'column-break-before',
 
-   'break-after',
 
-   'page-break-after',
 
-   'column-break-after'
 
- ]
 
- module.exports = BreakProps
 
 
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