We can useString.indexOf()orString.search()functions to implementcontains()function. String.indexOf()– returns the position of a substring, returns -1 if not found. String.search()– returns the position of a substring using regular expression, returns -1 if not found. Below are the diffe...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table. Javascript string contains MethodJavascript string contains exampleResult Javascript includes "Javascript String Contains".includes("String") true Javascript indexOf "...
contains() 方法确定一个字符串是否包含另一个字符串: string.includes(searchString[,position]) 如果在字符串中找到 searchString,includes() 方法返回 true;否则为false。 可选的position参数指定string中开始搜索 searchString 的位置。po...
const email = "user@example.com"; console.log(isValidUsername(email)); // true 2. 内容过滤:在处理文本内容时,检测是否包含敏感词、非法字符或特定关键词,以进行内容审核、自动标记或过滤。 function containsProfanity(text) { const profanities = ["swearword1", "swearword2", "etc."]; return prof...
); } const email = "user@example.com"; console.log(isValidUsername(email)); // true 2. 内容过滤:在处理文本内容时,检测是否包含敏感词、非法字符或特定关键词,以进行内容审核、自动标记或过滤。 function containsProfanity(text) { const profanities = ["swearword1", "swearword2", "etc."]; ...
Since'JavaScript'contains10characters,string1.lengthreturns10. Example 2: length Property is Read Only TheString.lengthproperty is a read-only property. There will be no effect if we try to change it manually. For example: letstring2 ="Programming";// assigning a value to string's length pr...
Example const message = "JavaScript is fun"; // check if message includes the string "Java" let result = message.includes("Java"); console.log(result); // Output: true Run Code includes() Syntax The syntax of the includes() method is: str.includes(searchString, position) Here, str...
(1)、JavaScript中的5种原始数据类型:Undefined、Null、Boolean、Number和String。需要注意的是JavaScript中字符串属于原始数据类型。 (2)、typeof运算符用于查看变量类型,对变量或值调用typeof运算符将返回下列值之一: undefined – 如果变量是 Undefined 类型的 ...
ES全称ECMAScript ,是JavaScript语言的国际标准。 最近总结了条js的基础特性相关的知识点,大家一起看一下吧 [图片上传失败...(image-de8402-1600133976264)] 1.严格模式 使用严格模式,可以在函数内部进行较为严格的全局和局部的错误条件检查 严格模式的编译指示,"use strict" 创建全局变量,未声明变量,非严格模式下...
String replace() String replaceAll() String split() JavaScript String Length Thelengthproperty returns the length of a string: Example lettext ="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; letlength = text.length; Try it Yourself » Extracting String Characters ...