isTenBased.js
Check if a number ten-based (10, 100, 1000, etc.).
Works in all modern browsers, and at least back to IE9.
/*!
* Check if a number ten-based (10, 100, 1000, etc.)
* (c) 2019 Chris Ferdinandi, MIT License, https://gomakethings.com
* @param {Integer} num The number
* @return {Boolean} If true, the number is ten-based
*/
var isTenBased = function (num) {
var str = num.toString();
var first = str.slice(0, 1);
var rest = str.slice(1, str.length);
return first === '1' & parseFloat(rest) === 0;
};