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niksumeiko/utils.numberToDay.js

Last active February 7, 2020 18:29
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JavaScript function that converts a number into the 2 digits day of the month with leading zeros (01-31). Very useful when working with the output that holds days of the month without leading zeros (1-31).
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utils.numberToDay.js
/**
* Turns a number/string to 2 digits day of the month with leading zero.
* @param {number|string} day to turn into day.
* @return {string}
*/
function numberToDay(j) {
return ('0' + j).slice(-2);
}
// Examples:
// Turning different type days into 2 digits number.
console.log( numberToDay(7) );
console.log( numberToDay('21') );
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Google Closure Library has a great function goog.string.padNumber that extends this gist function with number decimal precision.

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