diff --git a/.gitignore b/.gitignore
index 0a5f925..0e44f7d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,3 +20,4 @@ Thumbs.db
 *.ncrunchsolution
 nCrunchTemp*
 _ReSharper*
+launchSettings.json
diff --git a/VersionHistory.md b/VersionHistory.md
index 3207e93..46d5a7d 100644
--- a/VersionHistory.md
+++ b/VersionHistory.md
@@ -9,6 +9,11 @@ Prefix the description of the change with `[major]`, `[minor]` or `[patch]` in a
 
 ## Released
 
+### 1.1.0
+
+* Find and replace `.js`, `.py`, and `.ts` files.
+* Support snake case and kebab case, i.e. when replacing `SourceText` with `TargetText`, replace `source_text` with `target_text` and `source-text` with `target-text`.
+
 ### 1.0.0
 
 * Initial release.
diff --git a/src/FindReplaceCode/FindReplaceCode.csproj b/src/FindReplaceCode/FindReplaceCode.csproj
index 7f8186a..f824656 100644
--- a/src/FindReplaceCode/FindReplaceCode.csproj
+++ b/src/FindReplaceCode/FindReplaceCode.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp2.1</TargetFramework>
-    <VersionPrefix>1.0.0</VersionPrefix>
+    <VersionPrefix>1.1.0</VersionPrefix>
     <PackAsTool>true</PackAsTool>
     <ToolCommandName>findreplacecode</ToolCommandName>
     <PackageId>Faithlife.FindReplaceCode.Tool</PackageId>
diff --git a/src/FindReplaceCode/Program.cs b/src/FindReplaceCode/Program.cs
index 65e5ea3..68c00c7 100644
--- a/src/FindReplaceCode/Program.cs
+++ b/src/FindReplaceCode/Program.cs
@@ -144,6 +144,14 @@ private IEnumerable<KeyValuePair<string, string>> GetEnhancedFindReplacePairs(Ke
 			enhancedKeyValuePair = TryGetEnhancedFindReplacePairs(searchReplacePair, x => x.ToUpperInvariant());
 			if (enhancedKeyValuePair != null)
 				yield return enhancedKeyValuePair.Value;
+
+			enhancedKeyValuePair = TryGetEnhancedFindReplacePairs(searchReplacePair, x => ToSnakeCase(x, '_'));
+			if (enhancedKeyValuePair != null)
+				yield return enhancedKeyValuePair.Value;
+
+			enhancedKeyValuePair = TryGetEnhancedFindReplacePairs(searchReplacePair, x => ToSnakeCase(x, '-'));
+			if (enhancedKeyValuePair != null)
+				yield return enhancedKeyValuePair.Value;
 		}
 
 		private static KeyValuePair<string, string>? TryGetEnhancedFindReplacePairs(KeyValuePair<string, string> searchReplacePair, Func<string, string> transform)
@@ -286,6 +294,17 @@ private static string RenderMatchingGuid(Match match, Guid value)
 			return oldText != oldText.ToUpperInvariant() ? newText : newText.ToUpperInvariant();
 		}
 
+		private static string ToSnakeCase(string value, char separator)
+		{
+			if (value == null)
+				return null;
+
+			var words = GetWords(value);
+			return string.Join(separator.ToString(), words.Select(x => x.ToLowerInvariant()));
+		}
+
+		private static string[] GetWords(string value) => s_word.Matches(value).Select(x => x.ToString()).ToArray();
+
 		private const string c_guidPattern = @"\{[0-9a-zA-Z]{8}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{12}\}";
 
 		private static readonly string s_fullUsageMessage = string.Join(Environment.NewLine, new[]
@@ -294,6 +313,7 @@ private static string RenderMatchingGuid(Match match, Guid value)
 		});
 
 		private static readonly Regex s_hiddenDirectoryRegex = new Regex(@"[\\/]\..*[\\/]", RegexOptions.CultureInvariant);
+		private static readonly Regex s_word = new Regex("[A-Z]([A-Z]*(?![a-z])|[a-z]*)|[a-z]+|[0-9]+", RegexOptions.CultureInvariant | RegexOptions.ExplicitCapture);
 
 		private readonly string m_folderPath;
 		private readonly ReadOnlyCollection<KeyValuePair<string, string>> m_searchReplaceArgs;
diff --git a/src/FindReplaceCode/ProgramSettings.cs b/src/FindReplaceCode/ProgramSettings.cs
index 91b2309..741a74c 100644
--- a/src/FindReplaceCode/ProgramSettings.cs
+++ b/src/FindReplaceCode/ProgramSettings.cs
@@ -13,14 +13,17 @@ public static class ProgramSettings
 			".csproj",
 			".fsd",
 			".html",
+			".js",
 			".json",
 			".md",
 			".nuspec",
 			".props",
 			".proto",
 			".ps1",
+			".py",
 			".settings",
 			".sln",
+			".ts",
 			".xaml",
 			".yml",
 		};