Bank reconcilliation in Xero has no "auto match if reference and date are the same" option, so I (very crudely) scripted one. It'll run until it encounters a mismatch (which for the company I work for is basically never). Paste into console.

function go() {

    let line = document.querySelector('#statementLines .line');

    if (line) {

        let leftAndRight = line.querySelectorAll('.statement');

        let left = leftAndRight[0];
        let right = leftAndRight[1];

        if (right.hasClassName('matched')) {

            let leftDetails = left.querySelectorAll('.info .details-container .details span');
            let leftDate = leftDetails[0].textContent;
            let leftReference = leftDetails[1].textContent;

            let rightDetails = right.querySelectorAll('.info .details-container .details span');
            let rightDate = rightDetails[0].textContent;
            let rightReference = rightDetails[2].textContent;

            rightReference = rightReference.replace('Ref: ', '');

            if (Date.parse(leftDate).getTime() == Date.parse(rightDate).getTime() && leftReference.toLowerCase() == rightReference.toLowerCase()) {


                var okButton = line.querySelector(".ok .okayButton");

                console.log(leftReference);

                okButton.click();

                var waiter = function () {

                    if (line.parentNode == null) {

                        go();

                    }
                    else {
                        setTimeout(waiter, 50);
                    }


                };

                setTimeout(waiter, 50);



            }
            else {
                console.log("Details dont match");
            }


        }
        else {
            console.log("Line not matched");
        }

    }
    else {
        console.log("No line found");
    }

}

setTimeout(go, 100);