dayjs/plugin/weekOfYear.js

2KB immutable date time library alternative to Moment.js with the same modern API

!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.dayjs_plugin_weekOfYear=t()}(this,function(){"use strict";var e="year";return function(t,i,n){var r=i.prototype;r.week=function(t){if(void 0===t&&(t=null),null!==t)return this.add(7*(t-this.week()),"day");var i=this.$locale().weekStart||0,r=n(this).endOf(e);if(0===i&&6!==r.day()&&11===this.month()&&31-this.date()<=r.day())return 1;var d=n(this).startOf(e),a=d.subtract(d.day()-i,"day").subtract(1,"millisecond"),o=this.diff(a,"week",!0);return Math.ceil(o)},r.weeks=function(e){return void 0===e&&(e=null),this.week(e)}}});