How to check non-zero positive integers using JS regular code
This time I will show you how to verify non-zero positive integers using JS regular expressions. What are the precautions for regular verification of non-zero positive integers? The following is a practical case, let’s take a look.
Not much to say, please look at the example code<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
function validation() {
var val = document.getElementById("txtNumber").value;
var regu = /^[1-9]\d*$/;
//var regu = /^([1-9][0-9]*){1,3}$/; 亲测可用
//var regu = /^\+?[1-9][0-9]*$/; 亲测可用
if (val != "") {
if (!regu.test(val)) {
document.getElementById("labResult").style.color = "red";
document.getElementById("labResult").innerHTML = "验证失败！";
} else {
document.getElementById("labResult").style.color = "green";
document.getElementById("labResult").innerHTML = "验证成功！";
}
}
}
</script>
</head>
<body>
<input id="txtNumber" name="txtNumber" type="text" />
<input id="btnValidation" name="btnValidation" type="button" value="校验" onclick="validation()" />
验证结果：<label id="labResult" ></label>
</body>
</html>
## I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
Recommended reading:
Detailed explanation of the use of the most basic regular expressions in JSHow to match Abba reverse lookaheadThe above is the detailed content of How to check non-zero positive integers using JS regular code. For more information, please follow other related articles on the PHP Chinese website!
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