![]() ![]() This utility works by using the Letter and Mark RegEx Unicode character classes. ![]() The includes () method returns true if the substring is found else, it will return false. 5 ways to check if a string contains a substring in Javascript 1. So restricing non-ASCII characters may keep you from collecting the user's email address or the URL for their website. Javascript includes () method is used to perform a case-sensitive search to find out if a particular string is contained within another string. Similarly, non-ASCII characters can absolutely be in domain names. The optional position parameter specifies the position within the. So if someone's email address is núñ and your validation scripts reject any email addresses with non-ASCII letters, the user would be faced with the choice to either A) enter a non-working email, just to pass the validation, or B) abandon the form altogether. The includes() method returns true if the searchString found in the string otherwise false. But aside from being potentially discriminatory, these discrepancies can have systemic effects.įor example, it is perfectly valid (albeit, rare) to have non-ASCII values in an email address. But there is a city calledĪnd in Minnesota, there is a city commonly referred to asĮnglish speakers may assume that there is no harm in forcing someone with the name of "Núñez" to enter their name as "Nunez". In this Tutorial, we will learn about JavaScript String includes() method with the help of following below: The includes() method will be true if the string. ![]() The same problem often occurs when handling place names - even places in English-speaking countries. In other words, this approach only checks for the presence of letters in the ASCII range.Įven if an application is not specifically designed to be multilingual, it can be exclusionary (and potentially discriminatory) to force names (or other sensitive data) to conform to ASCII standards.įor example, when prompting a user to enter their last name, many English speakers assume thatīut there are many in the Latinx community who feel otherwise. match ( / ^ + $ / ) īut the above code is entirely Anglo-centric, because it assumes that the universe of letters consists of the capitals A-Z and the lowercases a-z. Const containsOnlyLetters = ( string = '' ) => ! ! string. ![]()
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