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
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 contains the specified substri...
Returnstrueorfalseif a stringendswith the specified, case-sensitive, value. It's useful when you need to check theendof a string for a specific substring. For example: conststr ='JavaScript';constsearchValue ='Script';console.log(str.endsWith(searchValue));// true ...
How do you check if one string contains a substring in JavaScript?Craig Buckler
How TO - Get The Length of a String❮ Previous Next ❯ Learn how to find the length of a string in JavaScript.String LengthThe length property returns the length of a string:Example var txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";var len = txt.length; Try it Yourself » ...
When the string is not null or undefined, and you intend to check for an empty one, you can use the length property of the string prototype, as follows:Javascript empty string1 2 3 4 let emptyStr = ""; if (!emptyStr && emptyStr.length == 0) { console.log("String is empty")...
That’s all about parsing a string in JavaScript. Conclusion To parse a string in JavaScript, use “parseInt()”, “parseFloat()”“Date.parse()” or the “JSON.parse()” methods. These methods parse the string into an integer, floating point number, Date object, and Object. This article...
The exec() method could not define all the possible matches from the string. So, the updates included the matchAll() method to return all subsets that match the regex in an array format. Code Snippet: var string = 'abc123 is a ridiculous name'; var regex = /i\w/g; var found = ...
You can get the number of digits in a JavaScript number in the following ways: Converting to String and Checking the length;
Another method to check if a string is a palindrome or not is by using aforloop. Below are the steps to check if a string is a palindrome in JavaScript. functionpalindromeFn(string){conststringLength=string.length;for(leti=0;i<stringLength/2;i++){if(string[i]!==string[stringLength-1...