+};
+
+const markStrike = {
+ parseDOM: [{tag: "s"}, {tag: "strike"}, {style: "text-decoration=line-through"}],
+ toDOM() {
+ return ["span", {style: "text-decoration: line-through;"}, 0];
+ }
+};
+
+const markSuperscript = {
+ parseDOM: [{tag: "sup"}],
+ toDOM() {
+ return ["sup", 0];
+ }
+};
+
+const markSubscript = {
+ parseDOM: [{tag: "sub"}],
+ toDOM() {
+ return ["sub", 0];
+ }
+};