diff --git a/examples/json_data/BUILD.bazel b/examples/json_data/BUILD.bazel
index 4fd8a563..a5f77e16 100644
--- a/examples/json_data/BUILD.bazel
+++ b/examples/json_data/BUILD.bazel
@@ -16,7 +16,6 @@ ts_project(
         "src/tsdata.txt",
         ":fg",
     ],
-    resolve_json_module = True,
     tsconfig = {
         "compilerOptions": {
             "resolveJsonModule": True,
diff --git a/examples/resolve_json_module/BUILD.bazel b/examples/resolve_json_module/BUILD.bazel
index d20d95a2..0151ccf3 100644
--- a/examples/resolve_json_module/BUILD.bazel
+++ b/examples/resolve_json_module/BUILD.bazel
@@ -13,6 +13,36 @@ ts_project(
     resolve_json_module = True,
 )
 
+ts_project(
+    name = "ts-dict-override",
+    srcs = [
+        "data.json",
+        "index.ts",
+    ],
+    extends = "tsconfig.json",
+    tsconfig = {
+        "compilerOptions": {
+            "outDir": "ts-dict-override",
+            "resolveJsonModule": True,
+        },
+    },
+)
+
+ts_project(
+    name = "ts-dict-unspecified",
+    srcs = [
+        "data.json",
+        "index.ts",
+    ],
+    extends = "tsconfig.json",
+    resolve_json_module = True,
+    tsconfig = {
+        "compilerOptions": {
+            "outDir": "ts-dict-unspecified",
+        },
+    },
+)
+
 assert_contains(
     name = "test",
     actual = "index.js",
@@ -25,3 +55,17 @@ js_test(
     data = [":ts"],
     entry_point = "index.js",
 )
+
+# Test that the json is available at runtime with various ways of
+# specifying resolveJsonModule in tsconfig.json.
+[
+    js_test(
+        name = "ts-with-json-%s" % t,
+        data = [":ts-%s" % t],
+        entry_point = "ts-%s/index.js" % t,
+    )
+    for t in [
+        "dict-override",
+        "dict-unspecified",
+    ]
+]
diff --git a/ts/defs.bzl b/ts/defs.bzl
index 0ad506f7..648cc739 100644
--- a/ts/defs.bzl
+++ b/ts/defs.bzl
@@ -260,15 +260,6 @@ def ts_project(
         **kwargs: passed through to underlying [`ts_project_rule`](#ts_project_rule), eg. `visibility`, `tags`
     """
 
-    if srcs == None:
-        include = ["**/*.ts", "**/*.tsx"]
-        exclude = []
-        if allow_js == True:
-            include.extend(["**/*.js", "**/*.jsx"])
-        if resolve_json_module == True:
-            include.append("**/*.json")
-            exclude.extend(["**/package.json", "**/package-lock.json", "**/tsconfig*.json"])
-        srcs = native.glob(include, exclude)
     tsc_deps = deps
 
     common_kwargs = {
@@ -299,17 +290,20 @@ def ts_project(
         no_emit = compiler_options.setdefault("noEmit", no_emit)
         emit_declaration_only = compiler_options.setdefault("emitDeclarationOnly", emit_declaration_only)
         allow_js = compiler_options.setdefault("allowJs", allow_js)
-        if resolve_json_module != None:
-            resolve_json_module = compiler_options.setdefault("resolveJsonModule", resolve_json_module)
+        resolve_json_module = compiler_options.setdefault("resolveJsonModule", resolve_json_module)
 
         # These options are always passed on the tsc command line so don't include them
         # in the tsconfig. At best they're redundant, but at worst we'll have a conflict
-        if "outDir" in compiler_options.keys():
-            out_dir = compiler_options.pop("outDir")
-        if "declarationDir" in compiler_options.keys():
-            declaration_dir = compiler_options.pop("declarationDir")
-        if "rootDir" in compiler_options.keys():
-            root_dir = compiler_options.pop("rootDir")
+        out_dir = compiler_options.pop("outDir", out_dir)
+        declaration_dir = compiler_options.pop("declarationDir", declaration_dir)
+        root_dir = compiler_options.pop("rootDir", root_dir)
+
+        if srcs == None:
+            # Default sources based on macro attributes after applying tsconfig properties
+            srcs = _default_srcs(
+                allow_js = allow_js,
+                resolve_json_module = resolve_json_module,
+            )
 
         # FIXME: need to remove keys that have a None value?
         write_tsconfig(
@@ -326,6 +320,12 @@ def ts_project(
         # From here, tsconfig becomes a file, the same as if the
         # user supplied a tsconfig.json InputArtifact
         tsconfig = "tsconfig_%s.json" % name
+    elif srcs == None:
+        # Default sources based on macro attributes
+        srcs = _default_srcs(
+            allow_js = allow_js,
+            resolve_json_module = resolve_json_module,
+        )
 
     typings_out_dir = declaration_dir if declaration_dir else out_dir
     tsbuildinfo_path = ts_build_info_file if ts_build_info_file else name + ".tsbuildinfo"
@@ -463,6 +463,20 @@ def ts_project(
         **kwargs
     )
 
+def _default_srcs(allow_js, resolve_json_module):
+    """Returns a list of srcs for ts_project when srcs is not provided."""
+    include = ["**/*.ts", "**/*.tsx"]
+    exclude = []
+
+    if allow_js == True:
+        include.extend(["**/*.js", "**/*.jsx"])
+
+    if resolve_json_module == True:
+        include.append("**/*.json")
+        exclude.extend(["**/package.json", "**/package-lock.json", "**/tsconfig*.json"])
+
+    return native.glob(include, exclude)
+
 def _invoke_custom_transpiler(type_str, transpiler, transpile_target_name, srcs, common_kwargs):
     if type(transpiler) == "function" or type(transpiler) == "rule":
         transpiler(