diff --git a/javascript/extractor/lib/typescript/src/virtual_source_root.ts b/javascript/extractor/lib/typescript/src/virtual_source_root.ts
index 88f9228790c..5f1bbf2b95e 100644
--- a/javascript/extractor/lib/typescript/src/virtual_source_root.ts
+++ b/javascript/extractor/lib/typescript/src/virtual_source_root.ts
@@ -17,7 +17,7 @@ export class VirtualSourceRoot {
   ) {}
 
   /**
-   * Maps a path under the real source root to the corresonding path in the virtual source root.
+   * Maps a path under the real source root to the corresponding path in the virtual source root.
    */
   public toVirtualPath(path: string) {
     if (!this.virtualSourceRoot) return null;
@@ -27,7 +27,7 @@ export class VirtualSourceRoot {
   }
 
   /**
-   * Maps a path under the real source root to the corresonding path in the virtual source root.
+   * Maps a path under the real source root to the corresponding path in the virtual source root.
    */
   public toVirtualPathIfFileExists(path: string) {
     let virtualPath = this.toVirtualPath(path);
diff --git a/javascript/extractor/src/com/semmle/js/extractor/AutoBuild.java b/javascript/extractor/src/com/semmle/js/extractor/AutoBuild.java
index 40a3a531d01..d3114360c7e 100644
--- a/javascript/extractor/src/com/semmle/js/extractor/AutoBuild.java
+++ b/javascript/extractor/src/com/semmle/js/extractor/AutoBuild.java
@@ -397,7 +397,7 @@ public class AutoBuild {
     for (FileType filetype : defaultExtract)
       for (String extension : filetype.getExtensions()) patterns.add("**/*" + extension);
 
-    // include .eslintrc files and package.json files
+    // include .eslintrc files, package.json files, and tsconfig.json files
     patterns.add("**/.eslintrc*");
     patterns.add("**/package.json");
     patterns.add("**/tsconfig.json");
@@ -601,7 +601,7 @@ public class AutoBuild {
   }
 
   /**
-   * Returns an existing file named <code>dir/stem.ext</code> where <code>ext</code> is any
+   * Returns an existing file named <code>dir/stem.ext</code> where <code>.ext</code> is any
    * of the given extensions, or <code>null</code> if no such file exists.
    */
   private static Path tryResolveWithExtensions(Path dir, String stem, Iterable<String> extensions) {
@@ -708,7 +708,7 @@ public class AutoBuild {
                 // Remove dependency on local package
                 propsToRemove.add(packageName);
               } else {
-                // Remove file dependency on a package that don't exist in the checkout.
+                // Remove file dependency on a package that doesn't exist in the checkout.
                 String dependency = getChildAsString(dependencyObj, packageName);
                 if (dependency != null && (dependency.startsWith("file:") || dependency.startsWith("./") || dependency.startsWith("../"))) {
                     if (dependency.startsWith("file:")) {