jsはある時間を現在の時間の間隔に変えます.

/**
 * @Memo       
 *  
 * @Author songyf
 * @Date Aug 22,2019
 * 
 * @Readme     ：eg: $("#id").html(plugin.convertTime("2019-08-23 15:00:00"));
               $("#id").html(plugin.convertTime(new Date()));
               $("#id").html(plugin.convertTime(new Date("2019-08-21")));
			   ......
 */
;(function(win,undefined) {
	 "use strict" 
	 var _win;
     var plugin = {
    		/**
    		 *    ：                【  、1   、     ...】
    		 * @param e 
    		 * @param t 
    		 * @returns
    		 */
    		convertTime: function(e , t) {
    			var i = this,
    			o = [[], []],
    			a = (new Date).getTime() - new Date(e).getTime();
    			return a > 6912e5 ? (a = new Date(e), o[0][0] = i.digit(a.getFullYear(), 4), o[0][1] = i.digit(a.getMonth() + 1), o[0][2] = i.digit(a.getDate()), t || (o[1][0] = i.digit(a.getHours()), o[1][1] = i.digit(a.getMinutes()), o[1][2] = i.digit(a.getSeconds())), o[0].join("-") + " " + o[1].join(":")) : a >= 864e5 ? (a / 1e3 / 60 / 60 / 24 | 0) + "  ": a >= 36e5 ? (a / 1e3 / 60 / 60 | 0) + "   ": a >= 12e4 ? (a / 1e3 / 60 | 0) + "   ": a < 0 ? "  ": "  "
    		},
    		digit: function(e, t) {
    			var i = "";
    			e = String(e),
    			t = t || 2;
    			for (var o = e.length; o < t; o++) i += "0";
    			return e < Math.pow(10, t) ? i + (0 | e) : e
    		},
    }
    //            
    _win = (function(){ return this || (0, eval)('this'); }());
    !('plugin' in _win) && (_win.plugin = plugin);
}());