Respond to PR comment.

packages/builder/src/components/common/bindings/EvaluationSidePanel.svelte

@@ -3,6 +3,7 @@
   import { Icon, ProgressCircle, notifications } from "@budibase/bbui"
   import { copyToClipboard } from "@budibase/bbui/helpers"
   import { fade } from "svelte/transition"
+  import { UserScriptError } from "@budibase/string-templates"
 
   export let expressionResult
   export let expressionError
@@ -15,7 +16,7 @@
   $: highlightedResult = highlight(expressionResult)
 
   const formatError = err => {
-    if (err.code === "USER_SCRIPT_ERROR") {
+    if (err.code === UserScriptError.code) {
       return err.userScriptError.toString()
     }
     return err.toString()

packages/server/src/jsRunner/vm/isolated-vm.ts

@@ -7,27 +7,13 @@ import querystring from "querystring"
 
 import { BundleType, loadBundle } from "../bundles"
 import { Snippet, VM } from "@budibase/types"
-import { iifeWrapper } from "@budibase/string-templates"
+import {
+  iifeWrapper,
+  JsErrorTimeout,
+  UserScriptError,
+} from "@budibase/string-templates"
 import environment from "../../environment"
 
-class ExecutionTimeoutError extends Error {
-  code = "ERR_SCRIPT_EXECUTION_TIMEOUT"
-  constructor(message: string) {
-    super(message)
-    this.name = "ExecutionTimeoutError"
-  }
-}
-
-class UserScriptError extends Error {
-  code = "USER_SCRIPT_ERROR"
-  constructor(readonly userScriptError: Error) {
-    super(
-      `error while running user-supplied JavaScript: ${userScriptError.toString()}`,
-      { cause: userScriptError }
-    )
-  }
-}
-
 export class IsolatedVM implements VM {
   private isolate: ivm.Isolate
   private vm: ivm.Context
@@ -223,7 +209,7 @@ export class IsolatedVM implements VM {
     if (this.isolateAccumulatedTimeout) {
       const cpuMs = Number(this.isolate.cpuTime) / 1e6
       if (cpuMs > this.isolateAccumulatedTimeout) {
-        throw new ExecutionTimeoutError(
+        throw new JsErrorTimeout(
           `CPU time limit exceeded (${cpuMs}ms > ${this.isolateAccumulatedTimeout}ms)`
         )
       }

packages/server/src/utilities/rowProcessor/utils.ts

@@ -1,5 +1,5 @@
 import { AutoFieldDefaultNames } from "../../constants"
-import { processStringSync } from "@budibase/string-templates"
+import { processStringSync, UserScriptError } from "@budibase/string-templates"
 import {
   AutoColumnFieldMetadata,
   FieldSchema,
@@ -84,7 +84,7 @@ export async function processFormulas<T extends Row | Row[]>(
               try {
                 return processStringSync(formula, context)
               } catch (err: any) {
-                if (err.code === "USER_SCRIPT_ERROR") {
+                if (err.code === UserScriptError.code) {
                   return err.userScriptError.toString()
                 }
                 throw err

packages/string-templates/src/errors.ts

@@ -1,9 +1,9 @@
 export class JsErrorTimeout extends Error {
-  code = "ERR_SCRIPT_EXECUTION_TIMEOUT"
+  static code = "ERR_SCRIPT_EXECUTION_TIMEOUT"
 }
 
 export class UserScriptError extends Error {
-  code = "USER_SCRIPT_ERROR"
+  static code = "USER_SCRIPT_ERROR"
 
   constructor(readonly userScriptError: Error) {
     super(

packages/string-templates/src/helpers/javascript.ts

@@ -3,6 +3,7 @@ import cloneDeep from "lodash/fp/cloneDeep"
 import { LITERAL_MARKER } from "../helpers/constants"
 import { getJsHelperList } from "./list"
 import { iifeWrapper } from "../iife"
+import { JsErrorTimeout, UserScriptError } from "../errors"
 
 // The method of executing JS scripts depends on the bundle being built.
 // This setter is used in the entrypoint (either index.js or index.mjs).
@@ -94,13 +95,10 @@ export function processJS(handlebars: string, context: any) {
   } catch (error: any) {
     onErrorLog && onErrorLog(error)
 
-    if (error.code === "ERR_SCRIPT_EXECUTION_TIMEOUT") {
+    if (error.code === JsErrorTimeout.code) {
       return "Timed out while executing JS"
     }
-    if (error.name === "ExecutionTimeoutError") {
-      return "Request JS execution limit hit"
-    }
-    if (error.code === "USER_SCRIPT_ERROR") {
+    if (error.code === UserScriptError.code) {
       throw error
     }
     return "Error while executing JS"

packages/string-templates/src/index.ts

@@ -231,7 +231,7 @@ export function processStringSync(
       return process(string)
     }
   } catch (err: any) {
-    if (err.code === "USER_SCRIPT_ERROR") {
+    if (err.code === UserScriptError.code) {
       throw err
     }
     return input
@@ -468,7 +468,7 @@ export function defaultJSSetup() {
       }
       createContext(context)
 
-      js = `
+      const wrappedJs = `
         result = {
           result: null,
           error: null,
@@ -483,7 +483,7 @@ export function defaultJSSetup() {
         result;
       `
 
-      const result = runInNewContext(js, context, { timeout: 1000 })
+      const result = runInNewContext(wrappedJs, context, { timeout: 1000 })
       if (result.error) {
         throw new UserScriptError(result.error)
       }