fix(core): update

ts/index.ts

@@ -0,0 +1,42 @@
+import * as plugins from './smartdiff.plugins';
+
+import diff from 'fast-diff';
+
+export const createDiff = (originalArg: string, revisionArg: string) => {
+  var result = diff(originalArg, revisionArg);
+  // According to latest jsperf tests, there's no need to cache array length
+  for (var i = 0; i < result.length; i++) {
+    var diffItem = result[i];
+    // If operation is DELETE or EQUAL, replace the actual text by its length
+    if (diffItem[0] < 1) {
+      // @ts-ignore
+      diffItem[1] = diffItem[1].length;
+    }
+  }
+  return JSON.stringify(result);
+};
+
+export const applyPatch = (originalArg: string, deltaStringArg: string) => {
+  const deltaArg = JSON.parse(deltaStringArg);
+  var result = '',
+      index = 0;
+
+  // According to latest jsperf tests, there's no need to cache array length
+  for (var i = 0; i < deltaArg.length; i++) {
+    const item = deltaArg[i];
+    const operation = item[0];
+    const value = item[1];
+
+    if (operation === -1) {
+      // DELETE
+      index += value;
+    } else if (operation === 0) {
+      // KEEP
+      result += originalArg.slice(index, index += value);
+    } else {
+      // INSERT
+      result += value;
+    }
+  }
+  return result;
+};

ts/smartdiff.plugins.ts

@@ -0,0 +1,2 @@
+const removeme = {};
+export { removeme };