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) ...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
//code to check if a value exists in an array using javascript indexOf var fruits_arr = ['Apple', 'Mango', 'Grapes', 'Orange', 'Fig', 'Cherry']; var string = "Orange"; // Find in Array fruits_arr.indexOf('Tomato'); fruits_arr.indexOf('Grapes'); // Find in String string...
以下是使用 Mermaid 描述的字典和它们的组成部分之间的关系图: DictionarystringkeystringvalueUserstringnameintageConfigurationstringsettingstringcontainsstores 解释关系图 Dictionary:表示字典,具有键值对属性。 User:表示用户信息。 Configuration:表示配置信息。 关系图展示字典与不同应用场景(如用户和配置设置)之间的关系。
//Using the includes() method to check whether //our string contains the search term. if(str.includes(searchTerm)){ alert('Substring found!'); } As you can see, the code above is basically the same as the code in the first example. ...
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 JavaScript
Return Value TypeDescription A boolean.trueif the string contains the value, otherwisefalse. More Examples Start at position 12: lettext ="Hello world, welcome to the universe."; letresult = text.includes("world",12); Try it Yourself » ...
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 ...
JavaScript String includes() Theincludes()method returns true if a string contains a specified value. Otherwise it returnsfalse. Examples Check if a string includes "world": lettext ="Hello world, welcome to the universe."; text.includes("world"); ...
/**//www.java2s.com* Bool check if an Array contains a value * * * @example ['Hello, world!'].contains('world!') * true * * @return {Bool} Returns bool true/false. */Array.prototype.contains =Array.prototype.contains ||function(value) {for(vari = 0, len = this.length; i ...