Stringifying JavaScript Objects
12345678910const user = { name: "Alice", age: 30, hobbies: ["reading", "biking"], isMember: true }; const jsonString = JSON.stringify(user); console.log(jsonString); // Output: {"name":"Alice","age":30,"hobbies":["reading","biking"],"isMember":true}
When you need to store or transmit a JavaScript object, you must first convert it into a string format. This process is called stringification. In JavaScript, you use the JSON.stringify method to turn an object into a JSON string. The result is a plain string that contains your data in JSON format, which is easy to save, send, or store.
The JSON.stringify function can also take two optional parameters to give you more control over the output. The second parameter, called replacer, lets you specify which properties should be included or filtered out. The third parameter, called space, is useful for formatting the output with indentation and line breaks, making the JSON string easier to read. For example, passing 2 as the third argument will add two spaces of indentation to each level in the output string.
1. What is the purpose of JSON.stringify?
2. Which parameter in JSON.stringify can be used to format the output?
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12345678910const user = { name: "Alice", age: 30, hobbies: ["reading", "biking"], isMember: true }; const jsonString = JSON.stringify(user); console.log(jsonString); // Output: {"name":"Alice","age":30,"hobbies":["reading","biking"],"isMember":true}
When you need to store or transmit a JavaScript object, you must first convert it into a string format. This process is called stringification. In JavaScript, you use the JSON.stringify method to turn an object into a JSON string. The result is a plain string that contains your data in JSON format, which is easy to save, send, or store.
The JSON.stringify function can also take two optional parameters to give you more control over the output. The second parameter, called replacer, lets you specify which properties should be included or filtered out. The third parameter, called space, is useful for formatting the output with indentation and line breaks, making the JSON string easier to read. For example, passing 2 as the third argument will add two spaces of indentation to each level in the output string.
1. What is the purpose of JSON.stringify?
2. Which parameter in JSON.stringify can be used to format the output?
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