https://stackoverflow.com › questions › 8993773
javascript - Contains case insensitive - Stack OverflowTo perform case-insensitive searches with indexOf(), you can make both strings either uppercase or lowercase. This means that, as in the second alert(), JavaScript will only check for the occurrence of the string you are looking for, capitalization ignored.
https://stackoverflow.com › questions › 2140627
How to do case insensitive string comparison? - Stack OverflowThere are two ways for case insensitive comparison: Convert strings to upper case and then compare them using the strict operator (===). Pattern matching using string methods: Use the "search" string method for case insensitive search.
https://bobbyhadz.com › blog › javascript-includes-case-insensitive
Make includes() case insensitive in JavaScript | bobbyhadzTo do a case insensitive check if an array contains a string: Use the Array.findIndex() method to iterate over the array. Convert each array element and the string to lowercase and check for equality.
The includes () method of String values performs a case-sensitive search to determine whether a given string may be found within this string, returning true or false as appropriate. Try it. Syntax. js. includes (searchString) includes (searchString, position) Parameters. searchString. A string to be searched for within str. Cannot be a regex.
https://masteringjs.io › tutorials › fundamentals › contains-substring
Check if a String Contains a Substring in JavaScriptTo do case insensitive search, you can use regular expressions and the String#match() function, or you can convert both the string and substring to lower case using the String#toLowerCase() function.
https://www.delftstack.com › fr › howto › javascript › how-to-perform-case-insensitive-string...
Comparaison de chaînes insensibles à la casse en JavaScriptUtilisez les méthodes de chaînes toUpperCase() / toLowerCase() pour effectuer une comparaison insensible à la casse en JavaScript. Utilisez la méthode localeCompare() pour faire une comparaison insensible à la casse en JavaScript.
https://masteringjs.io › tutorials › fundamentals › compare-strings-ignore-case
Compare Two JavaScript Strings, Ignoring Case - Mastering JSThe most basic way to do case insensitive string comparison in JavaScript is using either the toLowerCase() or toUpperCase() method to make sure both strings are either all lowercase or all uppercase.
https://www.w3schools.com › jsref › jsref_regexp_i.asp
JavaScript RegExp i Modifier - W3SchoolsSyntax. new RegExp (" regexp ", "i") or simply: / regexp /i. More Examples. Do a case-insensitive search for "w3schools" in a string: Using the RegExp function exec ():: let text = "Visit W3Schools"; let pattern = /w3schools/i; let result = pattern.exec(text); Try it Yourself » Using the RegExp function test ():: let text = "Visit W3Schools";
https://code-boxx.com › case-insensitive-string-comparison-javascript
3 Ways To Do Case Insensitive String Comparison In Javascript - Code BoxxThe common ways to do a case-insensitive string comparison in Javascript are: Change both strings to lowercase – if (FIRST.toLowerCase() == SECOND.toLowerCase()) { SAME } Use locale compare – if (FIRST.localeCompare(SECOND, "en", {sensitivity: "base"}) == 0) { SAME }
https://www.freecodecamp.org › news › how-to-check-if-a-string-contains-a-substring-javascript
How to Check if a String Contains a Substring in JavaScriptTo do a case-insensitive check and see if a substring is present within a string, you will need to convert both the original string and the substring to lowercase using the toLowerCase() JavaScript method before calling one of the two methods.
