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...
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How do you check if one string contains a substring in JavaScript?Craig Buckler
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 two methods shown below also work on arrays, which tells you if an array contains a given value (or the index of it forindexOf()). Keep this in mind when ...
In this case, we will use the includes() method which determines whether a string contains the specified word or a substring. If the word or substring is present in the given string, the includes() method returns true; otherwise, it returns false. ...
If you don’t wish to use includes you can go with good old indexOf method. 'hello javascript'.indexOf('javascript') !== -1 // output: true indexOf will return starting index of the substring, if it is found. If the substring is missing from string, it’ll return -1. ...
String.includes() Method 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 con...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
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
Also, just to check whether the substring is present in the string or not then we can apply a condition. If the index of the sub-string is not equals to (-1) then obviously it is present in the given string and hence it will returntrue, if not then it will return...