wiki/content/20200916172802-commonjs.md

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2024-05-06 20:40:05 +00:00
---
id: f41437f1-359e-41c9-894b-e5785c29d729
title: CommonJS
---
# Syntax
``` javascript
const ordinal = require("ordinal");
const {days, months} = require("date-names");
exports.formatDate = function(date, format) {
return format.replace(/YYYY|M(MMM)?|Do?|dddd/g, tag => {
if (tag == "YYYY") return date.getFullYear();
if (tag == "M") return date.getMonth();
if (tag == "MMMM") return months[date.getMonth()];
if (tag == "D") return date.getDate();
if (tag == "Do") return ordinal(date.getDate());
if (tag == "dddd") return days[date.getDay()];
});
};
```
``` javascript
const {formatDate} = require("./format-date");
console.log(formatDate(new Date(2017, 9, 13),
"dddd the Do"));
// → Friday the 13th
```