diff --git a/src/browser/chrome/parser.js b/src/browser/chrome/parser.js
new file mode 100644
index 0000000..904725c
--- /dev/null
+++ b/src/browser/chrome/parser.js
@@ -0,0 +1,155 @@
+// function parser() {
+const esprima = require('esprima');
+const estraverse = require('estraverse');
+const escodegen = require('escodegen');
+const _ = require('lodash');
+
+// declare functions to insert
+// TODO: Un-comment timeTravelTracker
+function useReducerReplacement() {
+  const dispatcher = resolveDispatcher();
+  function reducerWithTracker(state, action) {
+    const newState = reducer(state, action);
+    //  timeTravelTracker[timeTravelTracker.length - 1].actionDispatched = true;
+    window.postMessage({
+      type: 'DISPATCH',
+      data: {
+        state: newState,
+        action,
+      },
+    });
+    return newState;
+  }
+  return dispatcher.useReducer(reducerWithTracker, initialArg, init);
+}
+function commitAllHostEffectsReplacement() {
+  while (nextEffect !== null) {
+    {
+      setCurrentFiber(nextEffect);
+    }
+    recordEffect();
+
+    let {effectTag} = nextEffect;
+
+    if (effectTag & ContentReset) {
+      commitResetTextContent(nextEffect);
+    }
+
+    if (effectTag & Ref) {
+      let current$$1 = nextEffect.alternate;
+      if (current$$1 !== null) {
+        commitDetachRef(current$$1);
+      }
+    }
+
+    // The following switch statement is only concerned about placement,
+    // updates, and deletions. To avoid needing to add a case for every
+    // possible bitmap value, we remove the secondary effects from the
+    // effect tag and switch on that value.
+    let primaryEffectTag = effectTag & (Placement | Update | Deletion);
+    switch (primaryEffectTag) {
+      case Placement:
+      {
+        // editbyme
+        window.postMessage({
+          type: 'EFFECT',
+          data: {
+            primaryEffectTag: 'PLACEMENT',
+            effect: _.cloneDeep(nextEffect),
+          },
+        });
+
+        commitPlacement(nextEffect);
+        // Clear the "placement" from effect tag so that we know that this is inserted, before
+        // any life-cycles like componentDidMount gets called.
+        // TODO: findDOMNode doesn't rely on this any more but isMounted
+        // does and isMounted is deprecated anyway so we should be able
+        // to kill this.
+        nextEffect.effectTag &= ~Placement;
+        break;
+      }
+      case PlacementAndUpdate:
+      {
+        // Placement
+        commitPlacement(nextEffect);
+        // Clear the "placement" from effect tag so that we know that this is inserted, before
+        // any life-cycles like componentDidMount gets called.
+        nextEffect.effectTag &= ~Placement;
+
+        // Update
+        let _current = nextEffect.alternate;
+        commitWork(_current, nextEffect);
+        break;
+      }
+      case Update:
+      {
+        // editbyme
+        window.postMessage({
+          type: 'EFFECT',
+          data: {
+            primaryEffectTag: 'UPDATE',
+            effect: _.cloneDeep(nextEffect),
+            current: _.cloneDeep(nextEffect.alternate),
+          },
+        });
+
+        let _current2 = nextEffect.alternate;
+        commitWork(_current2, nextEffect);
+        break;
+      }
+      case Deletion:
+      {
+        // editbyme
+        window.postMessage({
+          type: 'EFFECT',
+          data: {
+            primaryEffectTag: 'DELETION',
+            effect: _.cloneDeep(nextEffect),
+          },
+        });
+
+        commitDeletion(nextEffect);
+        break;
+      }
+    }
+    nextEffect = nextEffect.nextEffect;
+  }
+
+  {
+    resetCurrentFiber();
+  }
+}
+
+// traverse ast to find method and replace body with our node's body
+function traverseTree(replacementNode, functionName, ast) {
+  estraverse.replace(ast, {
+    enter(node) {
+      if (node.type === 'FunctionDeclaration') {
+        if (node.id.name === functionName) {
+          node.body = replacementNode.body[0].body;
+        }
+      }
+    },
+  });
+}
+
+const parseAndGenerate = (codeString) => {
+  if (codeString.search('react')) {
+    const ast = esprima.parseModule(codeString);
+    // parse react-dom code
+    if (codeString.search('react-dom')) {
+      const injectableCommitAllHostEffects = esprima.parseScript(commitAllHostEffectsReplacement.toString());
+      traverseTree(injectableCommitAllHostEffects, 'commitAllHostEffects', ast);
+    } else {
+      // parse react code
+      const injectableUseReducer = esprima.parseScript(useReducerReplacement.toString());
+      traverseTree(injectableUseReducer, 'useReducer', ast);
+    }
+    const code = escodegen.generate(ast);
+    return code;
+  }
+  return -1;
+};
+
+// }
+module.exports = parseAndGenerate;