https://stackoverflow.com › questions › 1789945
How to check whether a string contains a substring in JavaScript ...String.prototype.includes is case-sensitive and is not supported by Internet Explorer without a polyfill. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:
https://www.w3schools.com › Jsref › jsref_includes.asp
JavaScript String includes() Method - W3SchoolsThe includes() method returns true if a string contains a specified string. Otherwise it returns false. The includes() method is case sensitive.
Description. Cette méthode détermine si une chaîne de caractères est contenue dans une autre. Sensibilité à la case. includes() est sensible à la casse. Par exemple, l'expression suivante nous retournera false : js. "Baleine bleue".includes("baleine"); // false. Exemples. Utiliser includes() js.
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
https://attacomsian.com › blog › ways-to-check-string-contains-substring-javascript
How to check if a string contains a substring in JavaScriptThere are multiple ways to check if a string contains a substring in JavaScript. You can use either String.includes(), String.indexOf(), String.search(), String.match(), regular expressions, or 3rd-party library like Lodash.
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 JavaScriptIn this article, you will learn two different ways you can check if a string contains a substring using JavaScript methods. Specifically, you will learn: How to use the built-in includes() JavaScript method.
https://attacomsian.com › blog › javascript-includes-method
Check if a string contains a substring using includes() in JavaScriptTo check if a string contains a substring using String.includes() in JavaScript: Call the String.includes() method on the string. Pass the substring as a parameter, e.g. String.includes(substr). The String.includes() method returns true if the substring is contained in the string. Otherwise, false is returned.
https://www.freecodecamp.org › news › javascript-string-contains-how-to-use-js-includes
JavaScript String Contains – How to use JS .includes() - freeCodeCamp.orgIn 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. str.includes(search-string, optional-position)
https://bobbyhadz.com › blog › javascript-check-if-element-contains-text
Check if an Element contains specific Text using JavaScriptTo check if an element contains specific text: Use the textContent property on the element to get the text content of the element and its descendants. Use the includes() method to check if the specific text is contained in the element.
https://stackoverflow.com › questions › 2430000
Determine if string is in list in JavaScript - Stack Overflowif (!String.prototype.isInList) { Object.defineProperty(String.prototype, 'isInList', { get: => function(...args) { let value = this.valueOf(); for (let i = 0, l = args.length; i < l; i += 1) { if (arguments[i] === value) return true; } return false; } }); }
