Clarification Needed on Using Func with ScriptInjection

[bogdaniolu97]

I’ve encountered difficulties using the Func property from ScriptInjection and haven’t been able to get it working. Any guidance or examples would be greatly appreciated.

` string InjectScriptAction()
{
return "function colorRed2(){console.log("colorRed3"); document.body.style.backgroundColor = 'red'; }";
}
var scriptInjection = new ScriptInjection

{
Target = new InjectionTarget

{
    TabId = tab.Id.Value,
},
Args = new List<object>() { "firstArgument" },
Func = () => InjectScriptAction(),

};
var result = await WebExtensions.Scripting.ExecuteScript(scriptInjection);`

manifest.json:
{
"manifest_version": 3,
"name": "Browser Extension With Blazor Extension",
"description": "My browser extension built with Blazor WebAssembly",
"version": "0.1",
"permissions": [
"activeTab",
"tabs",
"storage",
"webRequest",
"bookmarks",
"cookies",
"downloads",
"notifications",
"webNavigation",
"contextMenus",
"scripting"
],
"optional_permissions": [
"topSites"
],
"optional_host_permissions": [
"https:///",
"http:///"
],
"host_permissions": [
"http:///",
"https:///"
],
"background": {
"service_worker": "content/BackgroundWorker.js",
"type": "module"
},
"action": {
"default_popup": "popup.html"
},
"options_ui": {
"page": "options.html",
"open_in_tab": true
},
"content_security_policy": {
"extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'"
},
"content_scripts": [
{
"matches": ["<all_urls>"]
}
],
"web_accessible_resources": [
{
"resources": [
"framework/",
"content/",
"js/*.js"
],
"matches": [ "<all_urls>" ]
}
]
}

[mingyaulee]

The script injection feature might not be suitable to be executed from dotnet because dotnet is not available in the injected window. I haven't tested it personally yet, but it looks like it would be better to separate the injection into another JS file and use the Files property to inject the scripts.

[mingyaulee]

Also, evaluating JS in string is completely blocked by manifest v3, so your code that returns JS string will just be a string and will not be executed.