6 files changed, 22 insertions, 12 deletions
diff --git a/cli/rt/02_console.js b/cli/rt/02_console.js
index b07ccf187..b6f5bc74b 100644
--- a/cli/rt/02_console.js
+++ b/cli/rt/02_console.js
@@ -764,6 +764,19 @@
         return String(value[customInspect]());
       } catch {}
     }
+    // This non-unique symbol is used to support op_crates, ie.
+    // in op_crates/web we don't want to depend on unique "Deno.customInspect"
+    // symbol defined in the public API. Internal only, shouldn't be used
+    // by users.
+    const nonUniqueCustomInspect = Symbol.for("Deno.customInspect");
+    if (
+      nonUniqueCustomInspect in value &&
+      typeof value[nonUniqueCustomInspect] === "function"
+    ) {
+      try {
+        return String(value[nonUniqueCustomInspect]());
+      } catch {}
+    }
     if (value instanceof Error) {
       return String(value.stack);
     } else if (Array.isArray(value)) {
diff --git a/cli/rt/11_streams.js b/cli/rt/11_streams.js
index 7f8af19e2..630878e74 100644
--- a/cli/rt/11_streams.js
+++ b/cli/rt/11_streams.js
@@ -11,7 +11,8 @@
 
   const { cloneValue, setFunctionName } = window.__bootstrap.webUtil;
   const { assert, AssertionError } = window.__bootstrap.util;
-  const { customInspect, inspect } = window.__bootstrap.console;
+
+  const customInspect = Symbol.for("Deno.customInspect");
 
   const sym = {
     abortAlgorithm: Symbol("abortAlgorithm"),
@@ -636,9 +637,7 @@
     }
 
     [customInspect]() {
-      return `${this.constructor.name} {\n  readable: ${
-        inspect(this.readable)
-      }\n  writable: ${inspect(this.writable)}\n}`;
+      return this.constructor.name;
     }
   }
 
diff --git a/cli/rt/11_url.js b/cli/rt/11_url.js
index fee40ebcf..99f4ba0e1 100644
--- a/cli/rt/11_url.js
+++ b/cli/rt/11_url.js
@@ -2,7 +2,6 @@
 
 ((window) => {
   const core = window.Deno.core;
-  const { customInspect } = window.__bootstrap.console;
   const { isIterable, requiredArguments } = window.__bootstrap.webUtil;
 
   /** https://url.spec.whatwg.org/#idna */
@@ -492,7 +491,7 @@
   class URL {
     #searchParams = null;
 
-    [customInspect]() {
+    [Symbol.for("Deno.customInspect")]() {
       const keys = [
         "href",
         "origin",
diff --git a/cli/rt/20_headers.js b/cli/rt/20_headers.js
index 7b9ef8c8e..ccde77e8d 100644
--- a/cli/rt/20_headers.js
+++ b/cli/rt/20_headers.js
@@ -3,7 +3,6 @@
 ((window) => {
   const { DomIterableMixin } = window.__bootstrap.domIterable;
   const { requiredArguments } = window.__bootstrap.webUtil;
-  const { customInspect } = window.__bootstrap.console;
 
   // From node-fetch
   // Copyright (c) 2016 David Frank. MIT License.
@@ -194,7 +193,7 @@
       }
     }
 
-    [customInspect]() {
+    [Symbol.for("Deno.customInspect")]() {
       let length = this[headersData].length;
       let output = "";
       for (const [key, value] of this[headersData]) {
diff --git a/cli/rt/20_streams_queuing_strategy.js b/cli/rt/20_streams_queuing_strategy.js
index cbd30664f..af32c7d2e 100644
--- a/cli/rt/20_streams_queuing_strategy.js
+++ b/cli/rt/20_streams_queuing_strategy.js
@@ -1,7 +1,7 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 
 ((window) => {
-  const { customInspect } = window.__bootstrap.console;
+  const customInspect = Symbol.for("Deno.customInspect");
 
   class CountQueuingStrategy {
     constructor({ highWaterMark }) {
diff --git a/cli/rt/40_performance.js b/cli/rt/40_performance.js
index 768c43a6a..a785d23b1 100644
--- a/cli/rt/40_performance.js
+++ b/cli/rt/40_performance.js
@@ -2,9 +2,9 @@
 
 ((window) => {
   const { opNow } = window.__bootstrap.timers;
-  const { customInspect, inspect } = window.__bootstrap.console;
   const { cloneValue } = window.__bootstrap.webUtil;
 
+  const customInspect = Symbol.for("Deno.customInspect");
   let performanceEntries = [];
 
   function findMostRecent(
@@ -130,7 +130,7 @@
     [customInspect]() {
       return this.detail
         ? `${this.constructor.name} {\n  detail: ${
-          inspect(this.detail, { depth: 3 })
+          JSON.stringify(this.detail, null, 2)
         },\n  name: "${this.name}",\n  entryType: "${this.entryType}",\n  startTime: ${this.startTime},\n  duration: ${this.duration}\n}`
         : `${this.constructor.name} { detail: ${this.detail}, name: "${this.name}", entryType: "${this.entryType}", startTime: ${this.startTime}, duration: ${this.duration} }`;
     }
@@ -170,7 +170,7 @@
     [customInspect]() {
       return this.detail
         ? `${this.constructor.name} {\n  detail: ${
-          inspect(this.detail, { depth: 3 })
+          JSON.stringify(this.detail, null, 2)
         },\n  name: "${this.name}",\n  entryType: "${this.entryType}",\n  startTime: ${this.startTime},\n  duration: ${this.duration}\n}`
         : `${this.constructor.name} { detail: ${this.detail}, name: "${this.name}", entryType: "${this.entryType}", startTime: ${this.startTime}, duration: ${this.duration} }`;
     }