diff --git a/scripts/build-tplprev.sh b/scripts/build-tplprev.sh
index 293710c..a44953f 100755
--- a/scripts/build-tplprev.sh
+++ b/scripts/build-tplprev.sh
@@ -1,7 +1,16 @@
 #!/bin/bash
 
-cd $(git rev-parse --show-toplevel)
+# get the repo root directory safely
+REPO_ROOT="$(git rev-parse --show-toplevel)"
+cd "$REPO_ROOT" || { echo "Error: Failed to change directory"; exit 1; }
 
 cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" ./docs/assets/
 
-GOARCH=wasm GOOS=js go build -o ./docs/assets/tplprev.wasm ./tplprev
\ No newline at end of file
+# build webassembly binary
+GOARCH=wasm GOOS=js go build -o ./docs/assets/tplprev.wasm ./tplprev
+if [ $? -ne 0 ]; then
+    echo "Error: WASM build failed!"
+    exit 1
+fi
+
+echo "WASM build successful!"
\ No newline at end of file