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--- java-script:object-to-string-and-back [2023/08/11 09:45] – odefta
+++ java-script:object-to-string-and-back [2025/01/02 18:22] (current) – external edit 127.0.0.1
@@ Line 55: / Line 55: @@
 <note>
 If you're working with a more complex object structure that includes methods or other non-serializable values, you may need to implement custom serialization/deserialization logic.
+</note>
+<note tip>
+You can format the output of the **JSON.stringify** to be more easy to read or add transformation / filtering.
+Syntax:
+<code javascript>
+JSON.stringify(value, replacer, space)
+</code>
+  * **value**: The value to convert to a JSON string.
+  * **replacer**: Either a function that alters the behavior of the stringification process or an array of String and Number that serve as a whitelist for selecting/filtering the properties of the value object to be included in the JSON string. Passing **null** means that the entire object is included, without any changes.
+  * **space**: A String or Number object that's used to insert **white space** into the output JSON string for readability purposes.
+Example:
+<code javascript>
+const obj = {
+  name: 'John',
+  age: 30,
+  friends: ['Alice', 'Bob']
+};
+const jsonString = JSON.stringify(obj, null, 2);
+// 2 is the number of spaces for indentation
+</code>
+Output:
+<code javascript>
+{
+  "name": "John",
+  "age": 30,
+  "friends": [
+    "Alice",
+    "Bob"
+  ]
+}
+</code>
+To ski age from being included:
+<code javascript>
+const obj = { name: 'John', age: 30 };
+const filteredJSON = JSON.stringify(obj, ['name']);
+console.log(filteredJSON); // '{"name":"John"}'
+</code>
 </note>