Error when go back to root route(web_sys)

[jetli]

Describe the Bug
On home page, click a few sub routes and then click back button of browser to go back to home page, error occurs.

To Reproduce
Visit demo site: https://jetli.github.io/create-yew-app/, click About link on the top right corner, click back button of browser, error occurs

[Error] ERROR:yew_router::service -- Could not deserialize state string
	__cargo_web_snippet_4fd31c9e56d40b8642cf9e6f96fd6b570f355cea (static.77de5100.js:1219)
	（匿名函数） (static.77de5100.js:1590)
	wasm-stub
	<?>.wasm-function[web_logger::console::error::snippet::__cargo_web_snippet_4fd31c9e56d40b8642cf9e6f96fd6b570f355cea::__cargo_web_snippet_4fd31c9e56d40b8642cf9e6f96fd6b570f355cea::h5b50faacea4277b7]
	<?>.wasm-function[web_logger::console::error::snippet::__cargo_web_snippet_4fd31c9e56d40b8642cf9e6f96fd6b570f355cea::h3e67391e6def4f15]
	<?>.wasm-function[web_logger::console::error::snippet::hcebf4544ca96341e]
	<?>.wasm-function[web_logger::console::error::h6795d3532b8cae07]
	<?>.wasm-function[<web_logger::WebLogger as log::Log>::log::he0286cac0458b3a7]
	<?>.wasm-function[log::__private_api_log::h8b5631829de36bf2]
	<?>.wasm-function[yew_router::service::RouteService<STATE>::register_callback::{{closure}}::{{closure}}::h78069363d1cc2b2d]
	<?>.wasm-function[core::result::Result<T,E>::unwrap_or_else::h272bc9ab043cf519]
	<?>.wasm-function[yew_router::service::RouteService<STATE>::register_callback::{{closure}}::hdf1f1f25dd74a713]
	<?>.wasm-function[yew_router::service::RouteService<STATE>::register_callback::{{closure}}::h3e08b7858e727e96]
	<?>.wasm-function[<dyn core::ops::function::FnMut<(&A,)>+Output = R as wasm_bindgen::closure::WasmClosure>::describe::invoke::h7a78561faf3ff67f]
	wasm-stub
	_dyn_core__ops__function__FnMut___A____Output___R_as_wasm_bindgen__closure__WasmClosure___describe__invoke__h7a78561faf3ff67f
	__wbg_adapter_26 (static.77de5100.js:1533:136)
	real (static.77de5100.js:2347)

Related Info

• yew version: 0.13.0
• yew-router version: 0.10.0
• feature: web_sys

[jetli]

Related to register_callback
https://github.com/yewstack/yew_router/blob/60fe08a1d1baf4067058ab557fc8ea507c2ac018/src/service.rs#L107

state_string is constantly JsValue('null') or JsValue(null), and panic when it is JsValue(null) due to serde deserialize failure later.

[hgzimmerman]

Strange, I couldn't replicate the panic with the provided site, although, it does mention that deserializing state failed (which believe is caused by the problem described in the other issue you opened).

[jetli]

Yes, it's an error, not panic, I corrected title and description of this issue.

[hgzimmerman]

So this is expected behavior (although it is annoying with the logspam). I do intend to implement a better system in the near future. I've restarted work on yewstack/yew_router#218, which is the PR where it will be fixed, but I'm realizing that its going to be a pretty big breaking change and its going to take a while.

[jetli]

I didn't notice this error before, so I think this might be introduced after web-sys support.

[siku2]

No longer relevant with #1791.