javascript - 如何在 javascript 中检测某个字段是否处于焦点并清除除此之外的错误？

Question

我有这个功能

function validateEmailp() {
var two = document.getElementById('email').value;
var first = two.split("@")[1];
var badEmails = ["gmail.com", "yahoo.com"]
if (badEmails.indexOf(first) != -1) {
    document.getElementById("email").value = ""; 
    document.getElementById('emailerrorz').innerText = 'We do not accept free e-mails' 
    return false;
    }   
 return true;
}

HTML 是

<input id="email" onblur="validateEmailp()"><div id="emailerrorz"></div>

用户在输入字段中输入免费电子邮件后，他将收到该错误(我们不会..)但在他将电子邮件更正为非免费电子邮件后，错误应该会消失。我如何使用 JavaScript 做到这一点？

Answer 1

function validateEmailp() {
    var two = document.getElementById('email').value;
    var first = two.split("@")[1];
    var badEmails = ["gmail.com", "yahoo.com"]
    if (badEmails.indexOf(first) > -1) {
        document.getElementById("email").value = ""; 
        document.getElementById('emailerrorz').innerText = 'We do not accept free e-mails' 
        return false;
    } 
    document.getElementById('emailerrorz').innerText = '' 
    return true;
}