toAlternateCase

A JavaScript function that extends the String Prototype (bad practice, don't use this in production).

Code:

String.prototype.toAlternateCase = function () {
    let r = "";
    for (let i = 0; i < this.length; i++) {
        r += i % 2 == 1 ? this[i].toUpperCase() : this[i].toLowerCase();
    }
    return r;
}

Usage:

Add the code to your project (not recommended) and run it on a string:

"Lorem ipsum dolor sit amet, consectetur adipiscing elit".toAlternateCase()
// => `"lOrEm iPsUm dOlOr sIt aMeT, cOnSeCtEtUr aDiPiScInG ElIt"`

Change all text occurrences on a webpage

Open the console and copy/paste this, press enter and see the magic happen:

String.prototype.toAlternateCase = function () {
    let r = "";
    for (let i = 0; i < this.length; i++) {
        r += i % 2 == 1 ? this[i].toUpperCase() : this[i].toLowerCase();
    }
    return r;
}
document.querySelectorAll("*").forEach((el) => {
    el.childNodes.forEach((child) => {
        if (child.nodeType === 3) child.nodeValue = child.textContent.toAlternateCase()
    })
})

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