JavaScript Check whether a URL string is absolute or relative

// Input url
let URL = "https://www.geeksforgeeks.org/";

// Display input url
console.log(URL);

// Function to check url
function gfg_Run() {
    // Regular Expression to check url
    let RgExp = new RegExp("^(?:[a-z]+:)?//", "i");
    if (RgExp.test(URL)) {
        console.log("This is Absolute URL.");
    } else {
        console.log("This is Relative URL.");
    }
}

// Function call
gfg_Run();

// Input url
let URL = "/myfolder/test.txt";

// Display input url
console.log(URL);

// Function to check url type
function gfg_Run() {
    // Using index of to check url format
    if (URL.indexOf("://") > 0 || URL.indexOf("//") === 0) {
        console.log("This is Absolute URL.");
    } else {
        console.log("This is Relative URL.");
    }
}

// Function call
gfg_Run();

// Input url
let urlString = "https://www.example.com/images/logo.png";

// Display input url
console.log(urlString);

// Function to check url type
function checkURLType(urlString) {
    try {
        new URL(urlString);
        console.log("This is Absolute URL.");
    } catch (_) {
        console.log("This is Relative URL.");
    }
}

// Function call
checkURLType(urlString);