If you need to get the number from the end of the string, use theString.match()method with the same regular expression. index.js functionendsWithNumber(str){return/[0-9]+$/.test(str);}functiongetNumberAtEnd(str){if(endsWithNumber(str)){returnNumber(str.match(/[0-9]+$/)[0]);}...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
So with the understanding of theindexOfmethod, we can make use of it to check if the string contains spaces by passing a whitespace string to the method. Since the method returns an index when a whitespace exists, we can check if the value is greater than or equal to zero which returns...
JavaScript offers many ways to check if a string contains a substring. Learn the canonical way, and also find out all the options you have, using plain JavaScriptChecking if a string contains a substring is one of the most common tasks in any programming language....
Output of Vue.js Input Validation: Checking for Numbers When you run this Vue.js application, you'll see real-time feedback to the user. If the input contains a number, a message saying "Input contains a number" will be displayed; otherwise, the message will be "Input does not contain...
Vue.JS check if Array,Object or String is empty: In Vue.js, To check if an array is empty in Vue.js, you can use the Array.length property, which returns the number of elements in the array To check if the string is empty in Vue.js, you can use the
There 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. String.includes() Method The String.includes()provides the most ...
Using the.indexOf()Function to Check if Array Contains Value in JavaScript The.indexOf()functionis a commonly used function in javascript. It works well while searching for an element in an array or even a string. Syntax indexOf(element,index) ...
let myString = "John Doe"; if (typeof myString === "string") { console.log("This variable is a string"); } else { console.log("This variable is not a string"); } Indeed, the myString is a string: This variable is a string Note: Even if the variable contains a number th...
check.contains(string, substring): Returnstrueifstringcontainssubstring,falseotherwise. check.in(substring, string): Returnstrueifsubstringis instring,falseotherwise. check.match(string, regex): Returnstrueifstringmatchesregex,falseotherwise. Number predicates ...