get first word from a string in javascript

index.tsx
const str = "Hello World";
const firstWord = str.substr(0, str.indexOf(' '));
console.log(firstWord); // Output: "Hello"
121 chars
4 lines

index.tsx
const str = "Hello World";
const firstWord = str.split(' ')[0];
console.log(firstWord); // Output: "Hello"
107 chars
4 lines

index.tsx
const str = "Hello World";
const firstWord = str.match(/^\w+/)[0];
console.log(firstWord); // Output: "Hello"
110 chars
4 lines