Adds a 'bunq' option to any select field which already contains an option containing ASN or ING.

add-bunq-option.js

const bunqOption = document.createElement("option");
bunqOption.appendChild(document.createTextNode("bunq"));
bunqOption.value = "BUNQNL2A";

document.querySelectorAll("select").forEach(select => {
    const options = document.querySelectorAll(`#${select.id} option`);
    let hasBankCode = false;

    options.forEach(option => {
        if (option.value && option.value.includes("ING")) hasBankCode = true;
        if (option.innerHTML.includes("ING") || option.innerHTML.includes("ASN")) hasBankCode = true;
    });

    if (hasBankCode) {
        select.prepend(bunqOption);
        select.selectedIndex = 0;
    }
});

bookmark.js

javascript:var b=document.createElement("option");b.appendChild(document.createTextNode("bunq")),b.value="BUNQNL2A",document.querySelectorAll("select").forEach(function(e){var n=document.querySelectorAll("#"+e.id+" option"),c=!1;n.forEach(function(e){e.value&&e.value.includes("ING")&&(c=!0),(e.innerHTML.includes("ING")||e.innerHTML.includes("ASN"))&&(c=!0)}),c&&(e.prepend(b),e.selectedIndex=0)});