我尝试两种方法来解决此问题
<form method="post">
<input type="text" id="testId" name="testId" placeholder="Email" />
<button id="btnValidate" type="submit" onclick="return check();">subscribe</button>
</form>
其他方法是
<form method="post" onsubmit="return check();">
<input type="text" id="testId" name="testId" placeholder="Email" />
<button id="btnValidate" type="submit">subscribe</button>
</form>
我的js是
function check() {
var email = document.getElementById("testId").value;
var exptext = /^[A-Za-z0-9_\.\-]+@[A-Za-z0-9\-]+\.[A-Za-z0-9\-]+/;
if(exptext.test(email)==false){
alert("error");
document.addjoin.email.focus();
return false;
}else{
alert("complete");
return true;
}
}
提示显示“错误”,但提交错误的电子邮件。
我做错了什么?
答案 0 :(得分:0)
您只需要删除onclick="return check();"
然后,您只需将document.getElementById("btnValidate").onclick = check;
添加到您的js中就可以了
答案 1 :(得分:0)
<form method="post" id="form">
<input type="text" id="testId" name="testId" placeholder="Email" />
<button id="btnValidate" type="submit">subscribe</button>
</form>
<script>
let form = document.querySelector('#form');
form.addEventListener('submit', function(e) {
e.preventDefault();
check();
});
</script>
<script>
function check() {
let email = document.getElementById("testId").value;
let exptext = /^[A-Za-z0-9_\.\-]+@[A-Za-z0-9\-]+\.[A-Za-z0-9\-]+/;
if(exptext.test(email) === false){
alert("error");
document.addjoin.email.focus();
return false;
} else {
alert("complete");
return true;
}
}
</script>
这应该有效