Enable the ESLint no-console rule in parts of the code-base

eslint.config.mjs

@@ -313,6 +313,12 @@ export default [
       "template-curly-spacing": ["error", "never"],
     },
   },
+  {
+    files: jsFiles("src"),
+    rules: {
+      "no-console": "error",
+    },
+  },
 
   /* ======================================================================== *\
                             Test-specific rules
@@ -354,11 +360,13 @@ export default [
     files: jsFiles("test/unit"),
     rules: {
       "import/no-unresolved": ["error", { ignore: ["pdfjs/"] }],
+      "no-console": ["error", { allow: ["warn", "error"] }],
     },
   },
   {
     files: jsFiles("test/integration"),
     rules: {
+      "no-console": ["error", { allow: ["warn", "error"] }],
       "no-restricted-syntax": [
         "error",
         {

src/display/display_utils.js

@@ -413,6 +413,7 @@ function noContextMenu(e) {
 
 // Deprecated API function -- display regardless of the `verbosity` setting.
 function deprecated(details) {
+  // eslint-disable-next-line no-console
   console.log("Deprecated API usage: " + details);
 }
 

src/display/editor/tools.js

@@ -166,7 +166,7 @@ class ImageManager {
       }
       data.refCounter = 1;
     } catch (e) {
-      console.error(e);
+      warn(e);
       data = null;
     }
     this.#cache.set(key, data);

src/pdf.sandbox.js

@@ -84,6 +84,7 @@ class Sandbox {
         [buf, this._alertOnError]
       );
     } catch (error) {
+      // eslint-disable-next-line no-console
       console.error(error);
     } finally {
       if (buf) {

src/shared/util.js

@@ -363,13 +363,15 @@ function getVerbosityLevel() {
 // end users.
 function info(msg) {
   if (verbosity >= VerbosityLevel.INFOS) {
+    // eslint-disable-next-line no-console
     console.log(`Info: ${msg}`);
   }
 }
 
 // Non-fatal warnings.
 function warn(msg) {
   if (verbosity >= VerbosityLevel.WARNINGS) {
+    // eslint-disable-next-line no-console
     console.log(`Warning: ${msg}`);
   }
 }

test/integration/test_utils.mjs

@@ -309,9 +309,11 @@ async function waitForEvent({
 
   const success = await awaitPromise(handle);
   if (success === null) {
-    console.log(`waitForEvent: ${eventName} didn't trigger within the timeout`);
+    console.warn(
+      `waitForEvent: ${eventName} didn't trigger within the timeout`
+    );
   } else if (!success) {
-    console.log(`waitForEvent: ${eventName} triggered, but validation failed`);
+    console.warn(`waitForEvent: ${eventName} triggered, but validation failed`);
   }
 }