javascript - 解析特定语言环境中的日期字符串(不是时区!)

Question

使用 MomentJS，如有必要，我可以使用 .locale(或旧版本中的 .lang)在特定时刻实例(而不是全局)设置语言环境。如何使用全局语言环境以外的特定语言环境解析字符串？由于 moment 函数本身就是我们用于解析的函数，而且似乎没有进行完整解析的 .set 变体？

例如:

// Assume the default locale is 'en' (just in case, I'll set it for the snippet)
moment.locale('en');

// I have this string that's in the French locale
var str = "30 Avril 2015";

// Parsing it fails
var m = moment(str, "DD MMMM YYYY");
snippet.log(m.format("YYYY-MM-DD")); // "Invalid Date"

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.9.0/moment-with-locales.js"></script>
<!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="http://tjcrowder.github.io/simple-snippets-console/snippet.js"></script>

Answer 1

从版本 2.0.0 开始，可以将语言环境键作为第三个参数传递给 moment() 和 moment.utc()

// Assume the default locale is 'en' (just in case, I'll set it for the snippet)
moment.locale('en');

// I have this string that's in the French locale
var str = "30 Avril 2015";

// Parse it in 'fr'
var m = moment(str, "DD MMMM YYYY", "fr");

// Check result:
snippet.log(m.format("YYYY-MM-DD -- MMMM"));

// Check global locale
var locale = moment()._locale._abbr;
snippet.log('Locale : ' + locale);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.9.0/moment-with-locales.js"></script>
<!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="http://tjcrowder.github.io/simple-snippets-console/snippet.js"></script>