includes doesn’t have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:var string = "foo"; var substring
How do you check if one string contains a substring in JavaScript?Craig Buckler
9.在【制定的范围追加】字符串(插入字符串、替换字符串) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 NSString*aac=@"wwwbbbccc";NSRange ranges={4,0};NSString*aac1=[aac stringByReplacingCharactersInRange:ranges withString:@"aa"];NSLog(@"aac1: %@",aac1); 10.使用新的字符串【替换】...
方式一:直接赋值法 代码语言:javascript 代码运行次数:0 运行 AI代码解释 String str1="hello"; 方式二: new String() 代码语言:javascript 代码运行次数:0 运行 AI代码解释 String str2=newString("hello"); 方式三:创建一个字符数组ch,new String ( ch ) 代码语言:javascript 代码运行次数:0 运行 AI代码...
使用javascript实现C#的String.contains() 1functionisContains(str, substr) {2returnstr.indexOf(substr) >= 0;3} str为源字符串; substr为查找的字符; 返回true代表包含,false代表不包含。
Different methods to check if string contains spaces in JavaScript Method-1: UseindexOfmethod Not to be confused with the arrayindexOfmethod, theString.prototype.indexOf()takes a string argument and searches for it within the string it’s called upon and returns the index of the first occurren...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
varre=/apples/gi;varstr="Apples are round, and apples are juicy.";if(str.search(re)==-1){console.log("Does not contain Apples");}else{console.log("Contains Apples");} 10.slice() 提取字符串的片断,并在新的字符串中返回被提取的部分。
JavaScript By Ceferino IV Villareal Use the includes() method to search for a substring inside a string: var word = "bravery"; console.log(word.includes(“rave”)); // true Copy Syntax This quick and easy way to check if one string contains another is very simple to implement. Just ...
String.prototype.contains = function (str) { return (this.indexOf(str) !== -1); }; } How to use it: var str ='javascript string contains performance. which one is best'; if(str.contains('best')) { alert("String found");