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
规范版本 | 规范状态 | 注解 |
---|---|---|
ECMAScript 5.1 (ECMA-262) Date.prototype.toISOString Implemented in JavaScript 1.8 |
Standard | Initial definition. |
ECMAScript 2015 (6th Edition, ECMA-262) Date.prototype.toISOString |
Standard |
浏览器兼容性
BCD tables only load in the browser
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.