safe-stable-stringify - npm Package Compare versions

Comparing version 2.2.0 to 2.3.0

CHANGELOG.md

 # Changelog
 
+## v2.3.0
+
+- Accept the `Error` constructor as `circularValue` option to throw on circular references as the regular JSON.stringify would:
+
+```js
+import { configure } from 'safe-stable-stringify'
+
+const object = {}
+object.circular = object;
+
+const stringify = configure({ circularValue: TypeError })
+
+stringify(object)
+// TypeError: Converting circular structure to JSON
+```
+
+- Fixed escaping wrong surrogates. Only lone surrogates are now escaped.
+
 ## v2.2.0
@@ -4,0 +22,0 @@

index.d.ts

@@ -6,3 +6,3 @@ export function stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
   bigint?: boolean,
-  circularValue?: string | null,
+  circularValue?: string | null | TypeErrorConstructor | ErrorConstructor,
   deterministic?: boolean,
@@ -9,0 +9,0 @@ maximumBreadth?: number,

index.js

@@ -21,5 +21,5 @@ 'use strict'
 // eslint-disable-next-line
-const strEscapeSequencesRegExp = /[\u0000-\u001f\u0022\u005c\ud800-\udfff]/
+const strEscapeSequencesRegExp = /[\u0000-\u001f\u0022\u005c\ud800-\udfff]|[\ud800-\udbff](?![\udc00-\udfff])|(?<![\ud800-\udbff])[\udc00-\udfff]/
 // eslint-disable-next-line
-const strEscapeSequencesReplacer = /[\u0000-\u001f\u0022\u005c\ud800-\udfff]/g
+const strEscapeSequencesReplacer = /[\u0000-\u001f\u0022\u005c\ud800-\udfff]|[\ud800-\udbff](?![\udc00-\udfff])|(?<![\ud800-\udbff])[\udc00-\udfff]/g
 
@@ -47,3 +47,3 @@ // Escaped special characters. Use empty strings to fill up unused entries.
     ? meta[charCode]
-    : `\\u${charCode.toString(16).padStart(4, '0')}`
+    : `\\u${charCode.toString(16)}`
 }
@@ -68,4 +68,11 @@
       last = i + 1
-    } else if (point >= 55296 && point <= 57343) {
-      result += `${str.slice(last, i)}${`\\u${point.toString(16).padStart(4, '0')}`}`
+    } else if (point >= 0xd800 && point <= 0xdfff) {
+      if (point <= 0xdbff && i + 1 < str.length) {
+        const point = str.charCodeAt(i + 1)
+        if (point >= 0xdc00 && point <= 0xdfff) {
+          i++
+          continue
+        }
+      }
+      result += `${str.slice(last, i)}${`\\u${point.toString(16)}`}`
       last = i + 1
@@ -126,10 +133,17 @@ }
     if (typeof circularValue === 'string') {
-      circularValue = `"${circularValue}"`
-    } else if (circularValue === undefined) {
-      return
-    } else if (circularValue !== null) {
-      throw new TypeError('The "circularValue" argument must be of type string or the value null or undefined')
+      return `"${circularValue}"`
     }
+    if (circularValue == null) {
+      return circularValue
+    }
+    if (circularValue === Error || circularValue === TypeError) {
+      return {
+        toString () {
+          throw new TypeError('Converting circular structure to JSON')
+        }
+      }
+    }
+    throw new TypeError('The "circularValue" argument must be of type string or the value null or undefined')
   }
-  return circularValue === undefined ? '"[Circular]"' : circularValue
+  return '"[Circular]"'
 }
@@ -136,0 +150,0 @@

package.json

 {
   "name": "safe-stable-stringify",
-  "version": "2.2.0",
+  "version": "2.3.0",
   "description": "Deterministic and safely JSON.stringify to quickly serialize JavaScript objects",
@@ -32,3 +32,3 @@ "exports": {
     "lint": "standard --fix",
-    "tsc": "tsc"
+    "tsc": "tsc --project tsconfig.json"
   },
@@ -50,2 +50,3 @@ "engines": {
     "faster-stable-stringify": "^1.0.0",
+    "fastest-stable-stringify": "^2.0.2",
     "json-stable-stringify": "^1.0.1",
@@ -52,0 +53,0 @@ "json-stringify-deterministic": "^1.0.1",

readme.md

@@ -47,5 +47,6 @@ # safe-stable-stringify
   they are ignored. **Default:** `true`.
-* `circularValue` {string|null|undefined} Defines the value for circular
-  references. Set to `undefined`, circular properties are not serialized (array
-  entries are replaced with `null`). **Default:** `[Circular]`.
+* `circularValue` {string|null|undefined|ErrorConstructor} Defines the value for
+  circular references. Set to `undefined`, circular properties are not
+  serialized (array entries are replaced with `null`). Set to `Error`, to throw
+  on circular references. **Default:** `[Circular]`.
 * `deterministic` {boolean} If `true`, guarantee a deterministic key order
@@ -93,2 +94,9 @@ instead of relying on the insertion order. **Default:** `true`.
 // }
+
+const throwOnCircular = configure({
+  circularValue: Error
+})
+
+throwOnCircular(circular);
+// TypeError: Converting circular structure to JSON
 ```
@@ -95,0 +103,0 @@

tsconfig.json

@@ -20,3 +20,4 @@ {
   },
+  "include": ["**/*.js", "**/*.ts"],
   "exclude": ["compare.js", "benchmark.js", "./coverage"]
 }

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