直接返回时间戳：Date.now()；

当前时间 
let newDate = new Date();
      let strData = `${newDate.getFullYear()}-${newDate.getMonth() + 1}-${newDate.getDate()} ${newDate.getHours()}:${newDate.getMinutes()}:${newDate.getSeconds()}`
      console.log(strData);

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