JavaScript methods to format date and time and examples of custom formatting functions_javascript skills

Many times, we can use the built-in methods of the Date object in JavaScript to format, such as:

Copy code The code is as follows :

var d = new Date();
console.log(d); // Output: Mon Nov 04 2013 21:50:33 GMT 0800 (China Standard Time)
console. log(d.toDateString()); // Date string, output: Mon Nov 04 2013
console.log(d.toGMTString()); // Greenwich time, output: Mon, 04 Nov 2013 14 :03:05 GMT
console.log(d.toISOString()); // International Standards Organization (ISO) format, output: 2013-11-04T14:03:05.420Z
console.log(d. toJSON()); // Output: 2013-11-04T14:03:05.420Z
console.log(d.toLocaleDateString()); // Convert to local date format, depending on the environment, output: 2013 November 4
console.log(d.toLocaleString()); // Convert to local date and time format, depending on the environment, output: November 4, 2013 10:03:05 PM
console.log(d.toLocaleTimeString()); // Convert to local time format, depending on the environment, output: 10:03:05 PM
console.log(d.toString()); // Convert to String, output: Mon Nov 04 2013 22:03:05 GMT 0800 (China Standard Time)
console.log(d.toTimeString()); // Convert to time string, output: 22:03:05 GMT 0800 (China Standard Time)
console.log(d.toUTCString()); // Convert to world time, output: Mon, 04 Nov 2013 14:03:05 GMT

If the above method cannot meet our requirements, you can also customize a function to format the time, such as:

Copy code The code is as follows ; .getDate(),

"h ": this.getHours(),

"m ": this.getMinutes(),
"s ": this.getSeconds(),
"q" : Math.floor((this.getMonth() 3) / 3),
“S “: this.getMilliseconds()
};
if (/(y)/i.test(format) ) {
            format = format.replace(RegExp.$1, (this.getFullYear() '').substr(4 - RegExp.$1.length)); ) {
                                                                                    ? date[k] : ("00" date[k]).substr(("" date[k]).length));
                                                                                                                                                    ; >var d = new Date().format('yyyy-MM-dd');
console.log(d); // 2013-11-04