javascript - 如何在表单中只接受两种电子邮件域？

Question

我有一个表单，其中一个输入字段要求用户输入他们的电子邮件。但是，我只想接受@gmail.com和@outlook.com，但我的代码似乎只接受@outlook.com。任何人都可以对我的代码提出一些建议吗？

    $( "#email" ).change(function() {
    if (this.value.length <= 0 ) {
        email=0;
        $(this).removeClass( 'success_class' );
        $(this).addClass( 'error_class' );
        document.getElementById("emailError").innerHTML = "You need to enter your email";
    } else if (this.value.length > 200) {
        email=0;
        $(this).removeClass( 'success_class' );
        $(this).addClass( 'error_class' );
        document.getElementById("emailError").innerHTML = "The email is too big.";
    } else if ((this.value.search('@outlook.com') == -1 || this.value.search('@gmail.com') == -1) || (this.value.length != this.value.search('@outlook.com')+12 ||this.value.length != this.value.search('@gmail.com')+10)) {
        email=0;
        $(this).removeClass( 'success_class' );
        $(this).addClass( 'error_class' );
        document.getElementById("emailError").innerHTML = "You must enter your Gmail or Outlook email";
    } else {
        email=1;
        $(this).removeClass( 'error_class' );
        $(this).addClass( 'success_class' );
        document.getElementById("emailError").innerHTML = "";
    }
});

Answer 1

使用正则表达式 /\@(gmail|outlook){1}\.com$/i ->

• \@ 应包含@
• (gmail|outlook) 只能出现一次 gmail 或 Outlook
• .com$ .com 和结尾
• i -> 标记不区分大小写

$( "#email" ).change(function() {
    if (this.value.length <= 0 ) {
        email=0;
        $(this).removeClass( 'success_class' );
        $(this).addClass( 'error_class' );
        document.getElementById("emailError").innerHTML = "You need to enter your email";
    } else if (this.value.length > 200) {
        email=0;
        $(this).removeClass( 'success_class' );
        $(this).addClass( 'error_class' );
        document.getElementById("emailError").innerHTML = "The email is too big.";
    } else if (!/\@(gmail|outlook)\.com$/i.test(this.value)) {
        email=0;
        $(this).removeClass( 'success_class' );
        $(this).addClass( 'error_class' );
        document.getElementById("emailError").innerHTML = "You must enter your Gmail or Outlook email";
    } else {
        email=1;
        $(this).removeClass( 'error_class' );
        $(this).addClass( 'success_class' );
        document.getElementById("emailError").innerHTML = "";
    }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="email" name="email" type="email" />
<div id="emailError"></div>