Replace log with tracing in WASM crate (#550)

## 🎟️ Tracking

<!-- Paste the link to the Jira or GitHub issue or otherwise describe /
point to where this change is coming from. -->

## 📔 Objective

Cascading the standardization of `tracing` crate from clients repo into
the SDK, that was started per
bitwarden/clients#16321

, this change updates the WASM crate to use `tracing`.

## 📸 Screenshots

<img width="918" height="157" alt="Screenshot 2025-11-19 at 09 32 04"
src="https://github.com/user-attachments/assets/d84d9563-3dbc-49a1-bc5e-8caec6988cb1"
/>


## ⏰ Reminders before review

- Contributor guidelines followed
- All formatters and local linters executed and passed
- Written new unit and / or integration tests where applicable
- Protected functional changes with optionality (feature flags)
- Used internationalization (i18n) for all UI strings
- CI builds passed
- Communicated to DevOps any deployment requirements
- Updated any necessary documentation (Confluence, contributing docs) or
informed the documentation
  team

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  issue and could potentially benefit from discussion
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Author: neuronull

Cargo.lock

@@ -77,6 +77,12 @@ subtle = ">=2.5.0, <3.0"
 syn = ">=2.0.87, <3"
 thiserror = ">=1.0.40, <3"
 tokio = { version = "1.36.0", features = ["macros"] }
+tracing = { version = "0.1.41" }
+tracing-subscriber = { version = "0.3.20", features = [
+    "fmt",
+    "env-filter",
+    "tracing-log",
+] }
 tsify = { version = ">=0.5.5, <0.6", features = [
     "js",
 ], default-features = false }

Cargo.toml

@@ -33,9 +33,10 @@ bitwarden-state = { workspace = true, features = ["wasm"] }
 bitwarden-threading = { workspace = true }
 bitwarden-vault = { workspace = true, features = ["wasm"] }
 console_error_panic_hook = "0.1.7"
-console_log = { version = "1.0.0", features = ["color"] }
-log = "0.4.20"
 serde = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true }
+tracing-web = { version = "0.1.3" }
 tsify = { workspace = true }
 wasm-bindgen = { workspace = true }
 wasm-bindgen-futures = { workspace = true }

crates/bitwarden-wasm-internal/Cargo.toml

@@ -1,4 +1,8 @@
-use log::{Level, set_max_level};
+use tracing::Level;
+use tracing_subscriber::{
+    EnvFilter, fmt::format::Pretty, layer::SubscriberExt as _, util::SubscriberInitExt as _,
+};
+use tracing_web::{MakeWebConsoleWriter, performance_layer};
 use wasm_bindgen::prelude::*;
 
 #[wasm_bindgen]
@@ -12,26 +16,35 @@ pub enum LogLevel {
 
 fn convert_level(level: LogLevel) -> Level {
     match level {
-        LogLevel::Trace => Level::Trace,
-        LogLevel::Debug => Level::Debug,
-        LogLevel::Info => Level::Info,
-        LogLevel::Warn => Level::Warn,
-        LogLevel::Error => Level::Error,
+        LogLevel::Trace => Level::TRACE,
+        LogLevel::Debug => Level::DEBUG,
+        LogLevel::Info => Level::INFO,
+        LogLevel::Warn => Level::WARN,
+        LogLevel::Error => Level::ERROR,
     }
 }
 
-#[wasm_bindgen]
-pub fn set_log_level(level: LogLevel) {
-    let log_level = convert_level(level);
-    set_max_level(log_level.to_level_filter());
-}
-
 #[allow(missing_docs)]
 #[wasm_bindgen]
 pub fn init_sdk(log_level: Option<LogLevel>) {
     console_error_panic_hook::set_once();
+
     let log_level = convert_level(log_level.unwrap_or(LogLevel::Info));
-    if let Err(_e) = console_log::init_with_level(log_level) {
-        set_max_level(log_level.to_level_filter())
-    }
+
+    let filter = EnvFilter::builder()
+        .with_default_directive(log_level.into())
+        .from_env_lossy();
+
+    let fmt = tracing_subscriber::fmt::layer()
+        .with_ansi(false) // only partially supported across browsers
+        .without_time() // time is not supported in wasm
+        .with_writer(MakeWebConsoleWriter::new()); // write events to the console
+
+    let perf_layer = performance_layer().with_details_from_fields(Pretty::default());
+
+    tracing_subscriber::registry()
+        .with(perf_layer)
+        .with(filter)
+        .with(fmt)
+        .init();
 }