javascript - 如何用javascript中的值替换句子中的单词？

Question

我有以下场景，其中有以下字符串

Edit:  const message = results.doc.data().taskSettings.taskInProgressSettings.pushNotifications.onAssignmentNotifyEmployee.message;

我从 db 得到消息，变量不一定是 taskId , customerName 。它可以是 taskId、customerName、customerId、taskCreaterName、employeeName、employeeId。该消息可能包含上述任何变量，我需要在运行时用它的值替换它们。

message:`Task ${taskId} assigned by ${taskCreaterName} for customer ${customerName}`
let taskId = T-100;
let taskCreaterName = 'mark';
let customerName = 'henry';

我想用它的值替换变量(taskId，taskCreaterName，customername)，最终结果应该如下，

newMessage = Task T-100 assigned by mark for customer henry

实现此目标的最佳方法是什么。谢谢

Answer 1

为了以通用方式进行这项工作，您可以保留 1 个对象(例如我在下面创建的“withData”，而不是维护不同的变量)来存储要替换的值，并让通用函数(替换)处理所有更改，如下所示

let message = 'Task ${taskId} assigned by ${taskCreaterName} for customer ${customerName}'

let withData = {
  taskId: 'T-100'
  , taskCreaterName: 'mark'
  , customerName: 'henry'
}

function replace(obj, withData) {
  let result = message.slice(0)
  for (let [key, value] of Object.entries(withData)) {
    result = result.replace('${' + key + '}', value)
  }
  
  return result
}

let result = replace(message, withData)

console.log(result)

// In case Object.entries is not supported
function replace(obj, withData) {
  let result = message.slice(0)
  for (let key in withData) {
    let value = withData[key]
    result = result.replace('${' + key + '}', value)
  }
  
  return result
}