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
js字符串contains方法 /* * *string:原始字符串 *substr:子字符串 *isIgnoreCase:忽略大小写 */ function contains(string,substr,isIgnoreCase) { if(isIgnoreCase) { string=string.toLowerCase(); substr=substr.toLowerCase(); } var startChar=substr.substring(0,1); var strLen=substr.length; for(...
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。
Operations with strings vary from splitting to the removal of whitespaces to checking if a string contains spaces. JavaScript provides built-in string methods and features that allow us to manipulate or work with strings. Strings are immutable, and so the way we work with them can be a little...
varstr1="NaN means not a number. Infinity contains -Infinity and +Infinity in JavaScript.", str2="My grandfather is 65 years old and My grandmother is 63 years old.", str3="The contract was declared null and void."; str1.match("number");// "number" 是个字符串,返回["number"] ...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
Go: strings.Contains() Ruby: string.include? You get the point. There are a million ways to do this, and it seems like each language implements it differently. Anyway, let's see a few of the ways in which you can check if a string contains a substring in JavaScript. Note: The first...
If you want to find if a string contains another string then you already have a ready made function for that, and it would bestring.includes(). This function returnstruewhen the method finds another substring included in the main one, and returnsfalsewhen the main string does not contain th...
js string contains var ele = "D1|12345;D2|34567;D3|45678"; var contains = (ele.indexOf('D1|12345;') > -1); //true
This library contains a number of UTF-safe string operations, including the ones I just mentioned. These operations respect surrogate pairs to ensure you're not caught off guard.InstallationUtfString is designed to be used in node.js or in the browser....