toISOString() 方法返回一个 ISO（ISO 8601 Extended Format）格式的字符串： YYYY-MM-DDTHH:mm:ss.sssZ。时区总是UTC（协调世界时），加一个后缀“Z”标识。

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语法

dateObj.toISOString()

例子

var today = new Date("05 October 2011 14:48 UTC");
alert(today.toISOString()); // 返回2011-10-05T14:48:00.000Z

上例使用了非标准字符串的解析，该字符串在某些旧的浏览器（如IE）中可能无法被正确解析。

Polyfill

该方法在ECMA-262第5版中被标准化。对于那些不支持此方法的JS引擎可以通过加上下面的代码实现：

if ( !Date.prototype.toISOString ) {
  ( function() {
    
    function pad(number) {
      if ( number < 10 ) {
        return '0' + number;
      }
      return number;
    }
 
    Date.prototype.toISOString = function() {
      return this.getUTCFullYear() +
        '-' + pad( this.getUTCMonth() + 1 ) +
        '-' + pad( this.getUTCDate() ) +
        'T' + pad( this.getUTCHours() ) +
        ':' + pad( this.getUTCMinutes() ) +
        ':' + pad( this.getUTCSeconds() ) +
        '.' + (this.getUTCMilliseconds() / 1000).toFixed(3).slice(2, 5) +
        'Z';
    };
  
  }() );
}

规范

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

相关链接

• Date.prototype.toLocaleDateString()
• Date.prototype.toTimeString()
• Date.prototype.toUTCString()