How to check whether a string contains a substring in JavaScript

Question: How to check whether a string contains a substring in JavaScript

Answer:

First: Using 'includes()'.

const string = "RustcodeWeb"; const substring1 = "code"; const substring2 = "Web"; console.log(string.includes(substring1)); console.log(string.includes(substring2)); 

Output:

true true 

Second: Using 'indexof'.

const string = "RustcodeWeb"; const substring1 = "code"; const substring2 = "Web"; console.log(string.indexOf(substring1) !== -1); console.log(string.indexOf(substring2) !== -1); 

Output:

true true 

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