使用nodejs更新json数组值

Question

如何使用nodejs更新json文件数组值（特定值）。

json file:

{
  "EmailSubjects": {
    "RegistrationMailSubject": "New User Registration",
    "ApprovedMailSubject": "new user Approval ",
    "RejectedMailSubject": "new user Your  ",
    "ForgetPasswordSubject": "password recovery"

  }
}

在这个电子邮件主题中我只想更新registrationmailsubject值。 如何实现这一目标..

Answer 1

EmailSubjects.RegistrationMailSubject = "my new value"

Answer 2

let data = require('./path/to/file.json');
data.EmailSubjects.RegistrationMailSubject = 'New Text';

// if you want to persist the data
let fs = require('fs');
fs.writeFileSync('./path/to/file.json', JSON.stringify(data));