regular expression in javascript if condition to match the case insensitive string code example

Example 1: javascript string search case insensitive

function stringContainsCaseInsensitive(search, subject){
    return subject.toLowerCase().indexOf(search.toLowerCase()) !== -1;
}

stringContainsCaseInsensitive("red","We painted the room red.");//true

Example 2: how to compare strings in javascript ignoring case sensitive

const str1 = '[email protected]';
const str2 = '[email protected]';

str1 === str2; // false
str1.toLowerCase() === str2.toLowerCase(); // true

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Javascript Example

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