How to Check if a String Contains One of Multiple Values in JavaScript
Mark as Completed To match a variable in JavaScript against multiple possible values we can either use some in combination with includes in the following way const blacklist suspicious domain untrusty site devious page blacklist some item document location href includes item Or if you need to match against a more complex
String prototype includes JavaScript MDN MDN Web Docs, SearchString A string to be searched for within str Cannot be a regex All values that are not regexes are coerced to strings so omitting it or passing undefined causes includes to search for the string undefined which is rarely what you want position Optional The position within the string at which to begin searching for searchString Defaults to 0
JavaScript String includes Method W3Schools
Previous JavaScript String Reference Next More examples below Description The includes method returns true if a string contains a specified string Otherwise it returns false The includes method is case sensitive Syntax string includes searchvalue start true if the string contains the value otherwise false More Examples
Better Ways of Comparing a JavaScript String to Multiple Values, Personally I find Underscore s API to be the cleanest The contains API intuitively returns a boolean and there s not much to type You might however find yourself needing to remember the order of the parameters does the array come first or the value The check would be cleaner if the contains method were added to Array prototype directly
JavaScript String Contains How to use JS includes
JavaScript String Contains How to use JS includes , In JavaScript you can use the includes method to see if one string is found in another Here is the basic syntax for the includes method If the search string is found then it will return true If the search string is not found then it will return false The includes method is case sensitive which means if the search string doesn t
Three Less JavaScript Regexes You ll Have To Write With ES6
How to check if a string contains a substring in JavaScript
How to check if a string contains a substring in JavaScript The String includes provides the most simple and popular way to check if a string contains a substring in modern JavaScript It was introduced in ES6 and works in all modern browsers except Internet Explorer The String includes method returns true if the string contains the specified substring Otherwise it returns false
Three Less JavaScript Regexes You ll Have To Write With ES6
The string contains a special character if the result is greater than or equal to 0 Searching for multiple values within a string To search for multiple values within a string in JavaScript you can use the includes method of the String object JavaScript String Contains vegibit. The includes method compares searchElement to elements of the array using the SameValueZero algorithm Values of zero are all considered to be equal regardless of sign That is 0 is equal to 0 but false is not considered to be the same as 0 NaN can be correctly searched for When used on sparse arrays the includes method iterates empty slots as if they have the value undefined Teams Q A for work Connect and share knowledge within a single location that is structured and easy to search Learn more about Teams
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