google-images-paste-search.js

(() => {
    "use strict";

    let files = null;

    window.addEventListener("paste", (event) => {
        files = event.clipboardData.files;

        document.querySelector('[aria-label="Search by image"]').click();

        setTimeout(() => {
            const fileInput = document.querySelector("body > form:nth-child(13) > input[type=file]");
            fileInput.files = files;
            fileInput.dispatchEvent(new Event("change"));
        }, 1000);
    });
})();