function contains(string, substr, isIgnoreCase) { if (isIgnoreCase) { string = string.toLowerCase(); substr = substr.toLowerCase(); } var startChar = substr.substring(0, 1); var strLen = substr.length; for (var j = 0; j<string.length - strLen + 1; j++) { if (string.charAt(...
let str3 = 'JavaScript';if (str3.includes('Script')) { alert(`The string "${str3}" contains "Script".`);} else { alert(`The string "${str3}" does not contain "Script".`);} 五、注意事项 1、includes()方法区分大小写。2、如果搜索字符串为空，则返回true。3、如果指定的起始位置大...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
Check if a string includes "world": lettext ="Hello world, welcome to the universe."; letresult = text.includes("world"); Try it Yourself » More examples below. Description Theincludes()method returnstrueif a string contains a specified string. ...
boolean contains(String test) { for (Choice c : Choice.values()) { if (c.name()....
(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 ...
console.log(containsProfanity(message)); // true 3. 路径处理:在URL、文件路径或目录结构中,检查是否包含特定路径片段、文件扩展名等。 function isImageFile(path) { return path.endsWith(".jpg") || path.endsWith(".png") || path.includes(".jpeg"); ...
includes()Returns if a string contains a specified value indexOf()Returns the index (position) of the first occurrence of a value in a string lastIndexOf()Returns the index (position) of the last occurrence of a value in a string
How do you check if one string contains a substring in JavaScript?Craig Buckler
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 profanities.some(word => text.includes(word)); } const message = "This message contai...