Json.stringify

JSON, or JavaScript Object Notation, is all around us. If you've ever used a web app, there's a very good chance that it used JSON to structure, store, and transmit data between its servers and your device. In this article, we'll briefly go over the differences between JSON and JavaScript, then jump into different ways to parse JSON with JavaScript in the browser and in Node.js projects. Differences between JSON and JavaScript While JSON looks like regular JavaScript, it's better to think of JSON as a data format, similar to a text file. It just so happens that JSON is inspired by JavaScript syntax, which is why they look so similar. Let's take a look at JSON objects and JSON arrays and compare them to their JavaScript counterparts. JSON objects vs JavaScript Object Literals First, here's a JSON object: And that's it! We've covered just about everything you need to know about working with JSON in the browser and in Node.js projects. Now get out there and parse or stringify JSON to your heart's content. Did I miss something? How do you parse JSON in your projects? Let me know over on

const arr = ["John", "Peter", "Sally", "Jane"]; const myJSON = JSON.stringify(arr); You will learn how to send a JSON string to a server in the next chapters. Storing Data When storing data, the data has to be a certain format, and regardless of where you choose to store it, text is always one of the legal formats. JSON makes it possible to store JavaScript objects as text. // Storing data: const myObj = ; const myJSON = JSON.stringify(myObj); localStorage.setItem("testJSON", myJSON); // Retrieving data: let text = localStorage.getItem("testJSON"); let obj = JSON.parse(text); document.getElementById("demo").innerHTML = obj.name; const obj = ; const myJSON = JSON.stringify(obj); You can convert the string back into a date object at the receiver. Stringify Functions In JSON, functions are not allowed as object values. The JSON.stringify() function will remove any functions from a JavaScript object, both the key and the value:

• Complete beginners start here! • Getting started with the web • • • • • • • • • • HTML — Structuring the web • Introduction to HTML • • • • • • • • • • • Multimedia and embedding • • • • • • • • HTML tables • • • • • CSS — Styling the web • CSS first steps • • • • • • • CSS building blocks • • • • • • • • • • • • • • • • • • • • • • Styling text • • • • • • • CSS layout • • • • • • • • • • • • • • JavaScript — Dynamic client-side scripting • JavaScript first steps • • • • • • • • • • • JavaScript building blocks • • • • • • • • • Introducing JavaScript objects • • • • • • • • • Asynchronous JavaScript • • • • • • • Client-side web APIs • • • • • • • • • Web forms — Working with user data • Core forms learning pathway • • • • • • • • • • • • Advanced forms articles • • • • Accessibility — Make the web usable by everyone • Accessibility guides • • • • • • • • • Performance — Making websites fast and responsive • Performance guides • • • • • • • • • • • • MathML — Writing mathematics with MathML • MathML first steps • • • • Tools and testing • Client-side web development tools • • • • • • • Introduction to client-side frameworks • • • React • • • • • • • • Ember • • • • • • • Vue • • • • • • • • • • Svelte • • • • • • • • • Angular • • • • • • • Git and GitHub • • Cross browser testing • • • • • • • • • • Server-side website programming • First steps • • • • • • Django web framework (Python) • • • • • • • • • • • • • • • • • Express Web Framework (node.js/JavaScript) • • • ...

• Complete beginners start here! • Getting started with the web • • • • • • • • • • HTML — Structuring the web • Introduction to HTML • • • • • • • • • • • Multimedia and embedding • • • • • • • • HTML tables • • • • • CSS — Styling the web • CSS first steps • • • • • • • CSS building blocks • • • • • • • • • • • • • • • • • • • • • • Styling text • • • • • • • CSS layout • • • • • • • • • • • • • • JavaScript — Dynamic client-side scripting • JavaScript first steps • • • • • • • • • • • JavaScript building blocks • • • • • • • • • Introducing JavaScript objects • • • • • • • • • Asynchronous JavaScript • • • • • • • Client-side web APIs • • • • • • • • • Web forms — Working with user data • Core forms learning pathway • • • • • • • • • • • • Advanced forms articles • • • • Accessibility — Make the web usable by everyone • Accessibility guides • • • • • • • • • Performance — Making websites fast and responsive • Performance guides • • • • • • • • • • • • MathML — Writing mathematics with MathML • MathML first steps • • • • Tools and testing • Client-side web development tools • • • • • • • Introduction to client-side frameworks • • • React • • • • • • • • Ember • • • • • • • Vue • • • • • • • • • • Svelte • • • • • • • • • Angular • • • • • • • Git and GitHub • • Cross browser testing • • • • • • • • • • Server-side website programming • First steps • • • • • • Django web framework (Python) • • • • • • • • • • • • • • • • • Express Web Framework (node.js/JavaScript) • • • ...

JSON, or JavaScript Object Notation, is all around us. If you've ever used a web app, there's a very good chance that it used JSON to structure, store, and transmit data between its servers and your device. In this article, we'll briefly go over the differences between JSON and JavaScript, then jump into different ways to parse JSON with JavaScript in the browser and in Node.js projects. Differences between JSON and JavaScript While JSON looks like regular JavaScript, it's better to think of JSON as a data format, similar to a text file. It just so happens that JSON is inspired by JavaScript syntax, which is why they look so similar. Let's take a look at JSON objects and JSON arrays and compare them to their JavaScript counterparts. JSON objects vs JavaScript Object Literals First, here's a JSON object: And that's it! We've covered just about everything you need to know about working with JSON in the browser and in Node.js projects. Now get out there and parse or stringify JSON to your heart's content. Did I miss something? How do you parse JSON in your projects? Let me know over on freeCodeCamp is a donor-supported tax-exempt 501(c)(3) charity organization (United States Federal Tax Identification Number: 82-0779546) Our mission: to help people learn to code for free. We accomplish this by creating thousands of videos, articles, and interactive coding lessons - all freely available to the public. We also have thousands of freeCodeCamp study groups around the world. Donat...

const arr = ["John", "Peter", "Sally", "Jane"]; const myJSON = JSON.stringify(arr); You will learn how to send a JSON string to a server in the next chapters. Storing Data When storing data, the data has to be a certain format, and regardless of where you choose to store it, text is always one of the legal formats. JSON makes it possible to store JavaScript objects as text. // Storing data: const myObj = ; const myJSON = JSON.stringify(myObj); localStorage.setItem("testJSON", myJSON); // Retrieving data: let text = localStorage.getItem("testJSON"); let obj = JSON.parse(text); document.getElementById("demo").innerHTML = obj.name; const obj = ; const myJSON = JSON.stringify(obj); You can convert the string back into a date object at the receiver. Stringify Functions In JSON, functions are not allowed as object values. The JSON.stringify() function will remove any functions from a JavaScript object, both the key and the value: W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our

JSON, or JavaScript Object Notation, is all around us. If you've ever used a web app, there's a very good chance that it used JSON to structure, store, and transmit data between its servers and your device. In this article, we'll briefly go over the differences between JSON and JavaScript, then jump into different ways to parse JSON with JavaScript in the browser and in Node.js projects. Differences between JSON and JavaScript While JSON looks like regular JavaScript, it's better to think of JSON as a data format, similar to a text file. It just so happens that JSON is inspired by JavaScript syntax, which is why they look so similar. Let's take a look at JSON objects and JSON arrays and compare them to their JavaScript counterparts. JSON objects vs JavaScript Object Literals First, here's a JSON object: And that's it! We've covered just about everything you need to know about working with JSON in the browser and in Node.js projects. Now get out there and parse or stringify JSON to your heart's content. Did I miss something? How do you parse JSON in your projects? Let me know over on

const arr = ["John", "Peter", "Sally", "Jane"]; const myJSON = JSON.stringify(arr); You will learn how to send a JSON string to a server in the next chapters. Storing Data When storing data, the data has to be a certain format, and regardless of where you choose to store it, text is always one of the legal formats. JSON makes it possible to store JavaScript objects as text. // Storing data: const myObj = ; const myJSON = JSON.stringify(myObj); localStorage.setItem("testJSON", myJSON); // Retrieving data: let text = localStorage.getItem("testJSON"); let obj = JSON.parse(text); document.getElementById("demo").innerHTML = obj.name; const obj = ; const myJSON = JSON.stringify(obj); You can convert the string back into a date object at the receiver. Stringify Functions In JSON, functions are not allowed as object values. The JSON.stringify() function will remove any functions from a JavaScript object, both the key and the value: W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our

• Complete beginners start here! • Getting started with the web • • • • • • • • • • HTML — Structuring the web • Introduction to HTML • • • • • • • • • • • Multimedia and embedding • • • • • • • • HTML tables • • • • • CSS — Styling the web • CSS first steps • • • • • • • CSS building blocks • • • • • • • • • • • • • • • • • • • • • • Styling text • • • • • • • CSS layout • • • • • • • • • • • • • • JavaScript — Dynamic client-side scripting • JavaScript first steps • • • • • • • • • • • JavaScript building blocks • • • • • • • • • Introducing JavaScript objects • • • • • • • • • Asynchronous JavaScript • • • • • • • Client-side web APIs • • • • • • • • • Web forms — Working with user data • Core forms learning pathway • • • • • • • • • • • • Advanced forms articles • • • • Accessibility — Make the web usable by everyone • Accessibility guides • • • • • • • • • Performance — Making websites fast and responsive • Performance guides • • • • • • • • • • • • MathML — Writing mathematics with MathML • MathML first steps • • • • Tools and testing • Client-side web development tools • • • • • • • Introduction to client-side frameworks • • • React • • • • • • • • Ember • • • • • • • Vue • • • • • • • • • • Svelte • • • • • • • • • Angular • • • • • • • Git and GitHub • • Cross browser testing • • • • • • • • • • Server-side website programming • First steps • • • • • • Django web framework (Python) • • • • • • • • • • • • • • • • • Express Web Framework (node.js/JavaScript) • • • ...

const arr = ["John", "Peter", "Sally", "Jane"]; const myJSON = JSON.stringify(arr); You will learn how to send a JSON string to a server in the next chapters. Storing Data When storing data, the data has to be a certain format, and regardless of where you choose to store it, text is always one of the legal formats. JSON makes it possible to store JavaScript objects as text. // Storing data: const myObj = ; const myJSON = JSON.stringify(myObj); localStorage.setItem("testJSON", myJSON); // Retrieving data: let text = localStorage.getItem("testJSON"); let obj = JSON.parse(text); document.getElementById("demo").innerHTML = obj.name; const obj = ; const myJSON = JSON.stringify(obj); You can convert the string back into a date object at the receiver. Stringify Functions In JSON, functions are not allowed as object values. The JSON.stringify() function will remove any functions from a JavaScript object, both the key and the value: W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our