Tipify is-valid-json

content/redirects.yaml

@@ -2743,3 +2743,6 @@
 - from: /js/s/random-number-in-range
   to: /js/s/random-number-or-integer-in-range
   status: 301!
+- from: /js/s/is-valid-json
+  to: /js/s/string-is-valid-json
+  status: 301!

content/snippets/js/s/string-is-valid-json.md

@@ -0,0 +1,29 @@
+---
+title: Check if a JavaScript string is a valid JSON
+shortTitle: Check if string is valid JSON
+type: tip
+language: javascript
+tags: [type]
+cover: italian-horizon
+excerpt: Use a simple JavaScript trick to validate a serialized JSON object.
+dateModified: 2024-03-17
+---
+
+When working with serialized data, you might come across some malformed or invalid JSON strings from time to time. While JavaScript doesn't have a built-in validation method for JSON, it has a handy `JSON.parse()` method that can be used to check if a string is a valid JSON.
+
+Reading through the documentation, you'll find that `JSON.parse()` **throws** a `SyntaxError` if the string is **not a valid JSON**. We can use this to our advantage by wrapping the `JSON.parse()` method in a `try...catch` block to check if the string is valid.
+
+```js
+const isValidJSON = str => {
+  try {
+    JSON.parse(str);
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+
+isValidJSON('{"name":"Adam","age":20}'); // true
+isValidJSON('{"name":"Adam",age:"20"}'); // false
+isValidJSON(null); // true
+```