在文本输入按键上，我想显示没有任何插件的验证错误 [英] On text-input keypress I want to show validation error without any plugin
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问题描述
在文本输入按键上，我想显示没有任何插件的验证错误. 我正在尝试编写可在任何页面中使用的通用jQuery函数. 错误弹出窗口应该是动态的.
On text-input keypress I want to show validation error without any plugin. I am trying to code a generic jQuery function which I could use in any page. The error pop-up should be dynamic.
function checkno(txt,e) {
$(txt).keypress(function (e) {
//if the letter is not digit then display error and don't type anything
if (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57)) {
if (!document.getElementById('spanmsg')) {
$(txt).after("<span id='spanmsg' class='fixed'>This is wrong input</span>")
$('#spanmsg').show(0).delay("500").hide(0);
txt.value = '';
}
else {
$('#spanmsg').show(0).delay("500").hide(0);
txt.value = '';
}
return false;
}
});
}
推荐答案
我将整个代码放在下面，
I have put whole code below,
<html>
<head>
<title>Please Rate if it helps</title>
<!-- PUT A PATH OF JQUERY LIBRARY -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"> </script>
<script>
window.onload = function () {
$("#txt").keypress(function (e) {
//if the letter is not digit then display error and don't type anything
if (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57)) {
if (!$(txt).next().hasClass("spanmsg")) {
var error = $("<div class='spanmsg'>This is wrong input</div>");
$(txt).after(error);
$(error).css({
top: ($(txt).position().top + 1) + "px",
left: ($(txt).position().left + 1) + "px",
width: $(txt).width() + "px",
height: $(txt).height() + "px"
});
}
$(this).next().show(0).delay("500").delay(500, function () {
$(this).remove();
});
this.value = '';
return false;
}
});
}
</script>
<style>
.spanmsg {
position: absolute;
text-align: center;
color: red;
}
</style>
</head>
<body>
<input type="text" id="txt">
</body>
</html>
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