Contact Form 7

<?php echo do_shortcode('[contact-form-7 id="9bd55e7" title="联系表单" ajax="true" html_class="use-floating-validation-tip"]'); ?>

//  使用ajax需要wp_head或者wp_footer支持

let wpcf7Elm = document.querySelector('.wpcf7');
wpcf7Elm.addEventListener('wpcf7submit', function (event) {
    let inputs = event.detail.inputs;
    console.log(inputs);
    for (var i = 0; i < inputs.length; i++) {
        if ("username" == inputs[i].name) {
            inputs[i].value;
            break;
        }
    }
}, false);