How do you check if one string contains a substring in JavaScript?Craig Buckler
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
'hello javascript'.indexOf('javascript') !== -1 // output: true indexOf will return starting index of the substring, if it is found. If the substring is missing from string, it’ll return -1. 0 How do JavaScript closures work? How do I include a JavaScript file in another ...
containsIgnoreCase 方法是 String 类中的一个实例方法,用 于判断一个字符串是否包含另一个字符串,忽略大小写。它返回一个 布尔值,如果字符串包含指定的字符序列(不考虑大小写),则返回 true,否则返回 false。 javascript中的contains方法 javascript中的 contains⽅法 在研究⼀个多级菜单联动的js时,发现contains⽅...
代码语言:javascript 复制 using System;using System.Collections.Generic;using System.Linq;using System.Linq.Expressions;publicclassDynamicLinqContainsExample{publicstaticvoidMain(){List<string>items=newList<string>{"apple","banana","cherry","orange"};string searchString="an";// 创建参数表达式ParameterEx...
String.includes() Method The String.includes()provides the most simple and popular way to check if a string contains a substring in modern JavaScript. It was introduced in ES6 and works in all modern browsers except Internet Explorer. The String.includes() method returns true if the string con...
javascript 字符串 contains JavaScript 字符串replace 定义和用法 replace() 方法用于在字符串中用一些字符替换另一些字符,或替换一个与正则表达式匹配的子串。 语法 stringObject.replace(regexp/substr,replacement) 返回值 一个新的字符串,是用 replacement 替换了 regexp 的第一次匹配或所有匹配之后得到的。
In JavaScript, includes() method checks whether a sub-string or a character is present in the string or not. It will return output in terms of true and false. This method is case sensitive, which means that it will consider uppercase and lowercase differently....
EDITORIAL NOTE: In this post, we feature a comprehensive JavaScript String Contains Example. We will see some methods that can determine whether a string contains the characters of a specified string. Usually, programming languages have a special pre-processed function to find a sub-string of a ...
In this example, the function returns true if the string contains any white space in it else it returns false Conclusion: So to detect any white space in a given string in Javascript we can use the regex test() method or the stringindexOf() method. Related Topics: How to check if Str...