Get the Part Before First Occurrence in a String in JavaScript or Node.js Get the Part After First Occurrence in a String in JavaScript or Node.js Split a String into a List of Words in JavaScript or Node.jsĭetect if a String is in camelCase Format in Javascript or Node.jsĬheck If a String Is in Lowercase in JavaScript or Node.jsĬheck If a String is in Uppercase in JavaScript or Node.js Split a String into a List of Lines in JavaScript or Node.js Reverse a String in JavaScript or Node.js

Split a String into a List of Characters in JavaScript and Node.js Limit and Truncate a String to a Given Length in JavaScript and Node.js How to Check if a Value is a String in JavaScript or Node.jsĬheck If a String Includes All Strings in JavaScript/Node.js/TypeScriptĬheck if a Value is a String in JavaScript and Node.js Get the Part After a Character in a String in JavaScript or Node.js Get the Part Before a Character in a String in JavaScript or Node.js Remove Numbers From a String in JavaScript or Node.js Remove Extra Spaces From a String in JavaScript or Node.js Generate a Random ID or String in Node.js or JavaScript The code example below shows how you can use the indexOf method to check if a string contains a substring in ECMAScript 5 or older.Remove All Whitespace From a String in JavaScript } Option 2: Use the indexOf Method (ECMAScript 5 or older) run this code if People is present in the str constant const str = 'We the People of the United States, in Order to form a more perfect Union.' Ĭonsole.log(str.includes('We the')) // trueĬonsole.log(str.includes('Order')) // trueĬonsole.log(str.includes('notpresent')) // falseĬonsole.log(str.includes('WE THE')) // false The code snippet below shows you how to use the includes method to check if a string contains a substring in ECMAScript 6. Option 1: Use the includes Method (ECMAScript 6)

One of the ways is done using the includes method for JavaScript 6 (ECMAScript 6) and the other is with the indexOf for JavaScript 5 (ECMAScript 5) or older. There are two simple ways to check if a string contains a substring in JavaScript.

Contains string javascript