blueslip: Untangle from page_params.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

.eslintrc.js

@@ -247,6 +247,7 @@ module.exports = {
                 node: false,
             },
             globals: {
+                DEVELOPMENT: false,
                 ZULIP_VERSION: false,
             },
             rules: {

web/src/blueslip.ts

@@ -9,7 +9,6 @@
 import * as Sentry from "@sentry/browser";
 import $ from "jquery";
 
-import {page_params} from "./base_page_params";
 import {BlueslipError, display_stacktrace} from "./blueslip_stacktrace";
 
 if (Error.stackTraceLimit !== undefined) {
@@ -81,7 +80,7 @@ export function info(msg: string, more_info?: unknown): void {
 export function warn(msg: string, more_info?: unknown): void {
     const args = build_arg_list(msg, more_info);
     logger.warn(...args);
-    if (page_params.development_environment) {
+    if (DEVELOPMENT) {
         console.trace();
     }
 }
@@ -100,7 +99,7 @@ export function error(msg: string, more_info?: object | undefined, original_erro
     logger.error(...args);
 
     // Throw an error in development; this will show a dialog (see below).
-    if (page_params.development_environment) {
+    if (DEVELOPMENT) {
         throw new BlueslipError(msg, more_info, original_error);
     }
     // This function returns to its caller in production!  To raise a
@@ -109,7 +108,7 @@ export function error(msg: string, more_info?: object | undefined, original_erro
 
 // Install a window-wide onerror handler in development to display the stacktraces, to make them
 // hard to miss
-if (page_params.development_environment) {
+if (DEVELOPMENT) {
     $(window).on("error", (event: JQuery.TriggeredEvent) => {
         const {originalEvent} = event;
         if (originalEvent instanceof ErrorEvent && originalEvent.error instanceof Error) {

web/src/global.ts

@@ -51,5 +51,6 @@ declare global {
         };
     }
 
+    const DEVELOPMENT: boolean;
     const ZULIP_VERSION: string;
 }

web/webpack.config.ts

@@ -199,6 +199,7 @@ const config = (
         },
         plugins: [
             new DefinePlugin({
+                DEVELOPMENT: JSON.stringify(!production),
                 ZULIP_VERSION: JSON.stringify(env.ZULIP_VERSION ?? "development"),
             }),
             new DebugRequirePlugin(),