ref(javascript): Replace deprecated severity enums with string literals

src/includes/enriching-events/breadcrumbs/breadcrumbs-example/javascript.mdx

@@ -2,6 +2,6 @@
 Sentry.addBreadcrumb({
   category: "auth",
   message: "Authenticated user " + user.email,
-  level: Sentry.Severity.Info,
+  level: "info",
 });
 ```

src/includes/set-level/javascript.mdx

@@ -4,11 +4,13 @@ To set the level out of scope, you can call `captureMessage()` per event:
 Sentry.captureMessage("this is a debug message", "debug");
 ```
 
+Available levels are `"fatal"`, `"critical"`, `"error"`, `"warning"`, `"log"`, `"info"`, and `"debug"`.
+
 To set the level within scope, you can call `setLevel()`:
 
 ```javascript
 Sentry.configureScope(function(scope) {
-  scope.setLevel(Sentry.Severity.Warning);
+  scope.setLevel("warning");
 });
 ```
 
@@ -20,8 +22,8 @@ Sentry.withScope(function(scope) {
 
   // The exception has the event level set by the scope (info).
   Sentry.captureException(new Error("custom error"));
-
 });
+
 // Outside of withScope, the Event level will have their previous value restored.
 // The exception has the event level set (error).
 Sentry.captureException(new Error("custom error 2"));

src/platforms/common/enriching-events/breadcrumbs.mdx

@@ -41,6 +41,12 @@ The available breadcrumb keys are `type`, `category`, `message`, `level`, `times
 
 </PlatformSection>
 
+<PlatformSection supported={["javascript", "node"]}>
+
+You can choose from the following breadcrumb log levels: `"fatal"`, `"critical"`, `"error"`, `"warning"`, `"log"`, `"info"`, and `"debug"`.
+
+</PlatformSection>
+
 <PlatformSection notSupported={["native", "unreal"]}>
 
 ## Automatic Breadcrumbs

src/platforms/javascript/common/troubleshooting/index.mdx

@@ -395,12 +395,12 @@ document.body.addEventListener(
     if (event.target.tagName === "IMG") {
       Sentry.captureMessage(
         `Failed to load image: ${event.target.src}`,
-        Sentry.Severity.Warning
+        "warning"
       );
     } else if (event.target.tagName === "LINK") {
       Sentry.captureMessage(
         `Failed to load css: ${event.target.href}`,
-        Sentry.Severity.Warning
+        "warning"
       );
     }
   },