[Remove divided surrogate pair unicode] #JavaScript #Unicode

removeBrokenSurrogate.js

/* 
 * This would be necessary If you have limited length textarea and sliced the input string.
 * because individual surrogate codes are useless and raise error in Python and broken character is ugly
 * (https://unicode-table.com/en/blocks/high-surrogates/)
 */ 

function SliceAndCleanInputStr (inputStr) { // inputStr = 'aaaaaa😄'
	var sliced = inputStrstr.slice(0, 7) // "aaaaaa�"
	return sliced.replace(/[\ud800-\udbff]/g, '') // "aaaaaa"
}