More utilities for strings in JavaScript

The default export of this module is a constructor wrapping the given string in an object. Produce the given string by calling the property named "str". Methods for manipulating the given string are as follows.

MoreString static methods

You can make a string from an array, stringify a number of seconds into H:MM:SS format, stringify a number of seconds into machine-readable format "##H ##M ##S", stringify a number of seconds into a valid duration string for the "datetime" attribute of the semantic time tag, of the form "PT##H##M##S", according to the HTML Standard

MoreString.prototype methods

You can validate that the value given to constructor is a string, verify that the string of the object contains a substring and multiple occurrences, verify that the string of the object begins with any alphabetic or capital alphabetic character, break up the string of the object into a multi-line string with no more than 79 printed characters per line, and show the result of growing a CSV by one value.