Question

How to perform a case-insensitive search in JavaScript

Answer 1

function containsIgnoreCase(str, toFind) {
    return str.toLowerCase().indexOf(toFind.toLowerCase()) >= 0;
}

const str = "The FOX Profession is JavaScript Programmer";
const toFind = "fox";

const contains = containsIgnoreCase(str, toFind);

console.log(contains);



   
/*
run:
   
true
  
*/

 

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Answer 2

function containsIgnoreCase(str, toFind) {
    const regex = new RegExp(toFind, "i");
    
    return regex.test(str);
}

const str = "The FOX Profession is JavaScript Programmer";
const toFind = "fox";

console.log(containsIgnoreCase(str, toFind));


   
/*
run:
   
true
  
*/

 

70+ SQL courses for beginners and professionals