1. JSON.stringify(obj/arr)
js objects (array) is converted to json objects (array)
2. JSON.parse(json)
json objects (array) is converted to js objects (array)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <script> " Use strict " // 1. the JSON.stringify (obj / ARR) // // the JS json objects converted to an array of objects (array) // 2. the JSON.parse (json) // json objects into object array js var obj = { usernanme: 'kobe' } obj = JSON.stringify(obj)//json对象 console.log(typeof obj)//string obj = JSON.parse(obj); //js 对象 console.log(typeof obj)//object var A = ' fddsf ' var B = " dsdffds " // ordinary arrays </script> </body> </html>