region-break adapted for polyfill

assets/less/html2print.less

@@ -109,6 +109,8 @@
         width: @page-width;
         height: @page-height;
         position: relative;
+        box-sizing: border-box;
+        overflow: hidden;
     }
 
     // TODO: changer le format du papier en spread pour pouvoir imprimer en planche
@@ -156,4 +158,5 @@
      * if you want to put manual page breaks without attaching it to an HTML element
      */
     -webkit-region-break-before: always;
+                   break-before: always;
 }

assets/less/layout.less

@@ -84,7 +84,9 @@ h6 {
      * But it doesn't seem to work
      * if the element after has a page-break-inside avoid. It tries its best! */
     -webkit-region-break-inside: avoid;
+                   break-inside: avoid;
     -webkit-region-break-after: avoid;
+                   break-after: avoid;
 }
 
 /* AN EXAMPLE TO AVOID PAGE BREAK INSIDE,
@@ -92,6 +94,7 @@ h6 {
  * BUT YOU MIGHT WANT TO DEACTIVATE THIS */
 p {
     /*-webkit-region-break-inside: avoid;*/
+    /*               break-inside: avoid;*/
 }