我正在尝试使用javascript验证电话号码
[英]I'm trying to form validate a phone number with a javascript
问题描述
I'm trying to validate a phone number. 
我正在尝试验证电话号码。 This doesn't seem to work though. 不过，这似乎不起作用。 Why doesn't this work? 为什么不起作用？
<html>
<head>
<script>
function validateForm() {
var phone1 = document.forms["myForm"]["phone"].value;
var phone2 = ^(\+0?1\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$;
if ( phone1.value.match(phone2) ){
return true;
}else{
alert("Please enter a valid phone number");
return false;
}
}
</script>
</head>
<body>
<form name="myForm"
onsubmit="return validateForm()" method="post">
<label for="phone">Phone:</label><input name="phone" id="phone" value="" placeholder="Zip..." type="text" onsubmit="return validateForm()"/>
<button type="submit">Submit</button>
</form>
</body>
</html>
It definitely has something to do with the value comparison in the if statement, I just can't figure out how to accurately do this. 它肯定与if语句中的值比较有关，我只是想不出如何准确地做到这一点。
3 个解决方案
解决方案1
1 2015-06-09 04:55:33
var phone2 = ^(\+0?1\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$;
it's a wrong syntax for regexes in JavaScript, it should be JavaScript中的正则表达式语法错误，应该是
var phone2 = /^(\+0?1\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$/;
Also, you're getting field's value twice: 而且，您两次获得字段的值：
var phone1 = document.forms["myForm"]["phone"].value;
// ^
...
if (phone1.value.match(phone2)) {
// ^ `value` property here is not defined
See this jsfiddle with fixed code. 请参阅带有固定代码的jsfiddle 。
解决方案2
1 已采纳 2015-06-09 05:03:56
Your pattern RegExp , base on your pattern validation phone number is following way you should validate. 您的模式RegExp基于您的模式验证电话号码，是按照您应验证的方式进行的。
JS JS
function validateForm() {
var re = /^(\+0?1\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$/;
var phone1 = document.forms["myForm"]["phone"].value;
var m = re.exec(phone1);
if (m && m[0]){
return true;
}else{
alert("Please enter a valid phone number");
return false;
}
}
HTML 的HTML
<form name="myForm" onsubmit="return validateForm()" method="post">
<label for="phone">Phone:</label>
<input name="phone" id="phone" value="" placeholder="Zip..." type="text" onsubmit="return validateForm()" />
<button type="submit">Submit</button>
</form>
Use should use RegExp Pattern 使用时应使用RegExp模式
^((\+?)(1?(\-?)?))(\d{3})(-|\s)?\d{3}(-|\s)?\d{4}$
解决方案3
1 2015-06-09 05:17:43
Users tend to enter details in a textbox the way they like. 用户倾向于按自己喜欢的方式在文本框中输入详细信息。 It is an annoying experience if the form resticts them from entering the details in a specific fashion in a textbox. 如果表单阻止他们以特定方式在文本框中输入详细信息，这将是一个令人讨厌的体验。 Its better to generalize your regex for such patterns. 最好将您的正则表达式概括为此类模式。 @sainaen has pointed out the errors already but your regex can still fail in the following cases. @sainaen已经指出了错误，但在以下情况下，您的正则表达式仍会失败。
+1-234-123-1234
+1234-123-1234
+1234123-1234
+12341231234
2341231234
434-123-1234 //with a space in the end or beginning
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