Question

这是my code：

var date = "2014-07-23T15:23:12+0000";
var ts = new Date(date).getTime();
console.log(ts);

为什么IE11会打印NaN？

Firefox / Chrome /和其他浏览器在打印1406128992000时没有问题。

Answer 1

引自ECMAScript语言规范，第Date Time String Format部分：

ECMAScript定义了基于日期时间的字符串交换格式   简化了ISO 8601扩展格式。格式是   如下：YYYY-MM-DDTHH:mm:ss.sssZ
  ...
  Z是指定为＆＃34; Z＆＃34;的时区偏移量。（对于UTC）或者＆＃34; +＆＃34;或＆＃34; - ＆＃34;然后是时间表达式HH：mm

显然，您需要在时区指示符中添加:。这应该适用于IE9：

＆＃13;

var dateString = "2014-07-23T15:23:12+0000";
var dateStringISO = dateString.replace(/([+\-]\d\d)(\d\d)$/, "$1:$2");
var timestamp = new Date(dateStringISO).getTime();
console.log(dateString, dateStringISO, timestamp);

＆＃13;

对于Twitter日期，您可以使用相同的策略：

＆＃13;

var dateString = "Mon Jan 13 16:04:04 +0000 2014";
var dateStringISO = dateString.replace(/^... (...) (..) (........) (...)(..) (....)$/, function(match, month, date, time, tz1, tz2, year) {
  return year + "-" + {
    Jan: "01",
    Feb: "02",
    Mar: "03",
    Apr: "04",
    May: "05",
    Jun: "06",
    Jul: "07",
    Aug: "08",
    Sep: "09",
    Oct: "10",
    Nov: "11",
    Dec: "12"
  }[month] + "-" + date + "T" + time + tz1 + ":" + tz2;
});
var timestamp = new Date(dateStringISO).getTime();
console.log(dateString, dateStringISO, timestamp);

＆＃13;

Date.getTime（）在IE11中返回ISO / Twitter API日期的NaN

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