La chaîne JS contient une sous-chaîne Ignore Case
const str = 'arya stark';
// The most concise way to check substrings ignoring case is using
// `String#match()` and a case-insensitive regular expression (the 'i')
str.match(/Stark/i); // true
str.match(/Snow/i); // false
// You can also convert both the string and the search string to lower case.
str.toLowerCase().includes('Stark'.toLowerCase()); // true
str.toLowerCase().indexOf('Stark'.toLowerCase()) !== -1; // true
str.toLowerCase().includes('Snow'.toLowerCase()); // false
str.toLowerCase().indexOf('Snow'.toLowerCase()) !== -1; // false
Uninterested Unicorn