From 8f8bd40e8d870028ba299bf124ed45530da50954 Mon Sep 17 00:00:00 2001
From: Ivan Enderlin <ivan@mnt.io>
Date: Tue, 12 Jul 2022 10:15:25 +0200
Subject: [PATCH] feat(bindings/crypto-js): Redirect Rust panics to JavaScript
 console.

---
 bindings/matrix-sdk-crypto-js/Cargo.toml |  1 +
 bindings/matrix-sdk-crypto-js/src/lib.rs | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/bindings/matrix-sdk-crypto-js/Cargo.toml b/bindings/matrix-sdk-crypto-js/Cargo.toml
index 94d14468c..b5cbe56af 100644
--- a/bindings/matrix-sdk-crypto-js/Cargo.toml
+++ b/bindings/matrix-sdk-crypto-js/Cargo.toml
@@ -34,6 +34,7 @@ vodozemac = { git = "https://github.com/matrix-org/vodozemac/", rev = "2404f83f7
 wasm-bindgen = "0.2.80"
 wasm-bindgen-futures = "0.4.30"
 js-sys = "0.3.49"
+console_error_panic_hook = "0.1.7"
 serde_json = "1.0.79"
 http = "0.2.6"
 anyhow = "1.0"
diff --git a/bindings/matrix-sdk-crypto-js/src/lib.rs b/bindings/matrix-sdk-crypto-js/src/lib.rs
index a9b59426f..a985e4138 100644
--- a/bindings/matrix-sdk-crypto-js/src/lib.rs
+++ b/bindings/matrix-sdk-crypto-js/src/lib.rs
@@ -29,6 +29,16 @@ pub mod sync_events;
 use js_sys::{Object, Reflect};
 use wasm_bindgen::{convert::RefFromWasmAbi, prelude::*};
 
+/// Run some stuff when the Wasm module is instantiated.
+///
+/// Right now, it does the following:
+///
+/// * Redirect Rust panics to JavaScript console.
+#[wasm_bindgen(start)]
+pub fn start() {
+    console_error_panic_hook::set_once();
+}
+
 /// A really hacky and dirty code to downcast a `JsValue` to `T:
 /// RefFromWasmAbi`, inspired by
 /// https://github.com/rustwasm/wasm-bindgen/issues/2231#issuecomment-656293288.