Using JQuery.Validator AddMethod to validate stock symbol
Question
I am new to coding and I am not exactly sure what I am doing wrong here, but I am just to validate an input in a form against a few stock symbols. When I submit an symbol that isn't in the array, I do not receive the error message. My code is below.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.14.0/jquery.validate.js"></script>
<script>
jQuery.validator.addMethod("vsymbol", function(value)
{
var symbols = ["GOOG", "AAPL", "MSFT", "DIS"];
var in_array = $.inArray(value.toUpperCase(), symbols);
if (in_array == -1)
{
return false;
}
else
{
return true;
}
}, "Not a valid stock symbol");
$("#myform").validate(
{
rules: {
symbol: {
required: true,
symbol: true
}
}
}
);
</script>
<body>
<form id="myform" >
<label for="symbol">Ticker</label>
<input name="symbol" type="text" class="vsymbol" />
</form>
</body>
2 answers
solution1
1 2015-12-19 04:11:28
请在$（document）.ready（function（）{}）中包装您的代码，以便在dom加载后初始化此函数
solution2
0 2015-12-19 15:26:51
You've created a new rule called vsymbol . However, when you use it, you've misspelled it as symbol . You must reference it correctly in order for it to get used...
$("#myform").validate({
rules: {
symbol: { // <- name of the field
required: true,
vsymbol: true // <- name of the rule
}
}
});
If you've already assigned the rule via the rules object above, then it's totally redundant to assign it again within the field's class . Just use one or the other.
<input name="symbol" type="text" class="vsymbol" />
Also, since your form's HTML markup comes after your JavaScript, your jQuery needs to be wrapped in a DOM ready event handler.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.14.0/jquery.validate.js"></script>
<script>
$(document).ready(function() { // DOM ready event handler
jQuery.validator.addMethod("vsymbol", function(value) {
var symbols = ["GOOG", "AAPL", "MSFT", "DIS"];
var in_array = $.inArray(value.toUpperCase(), symbols);
return (in_array == -1) ? false : true;
}, "Not a valid stock symbol");
$("#myform").validate({
rules: {
symbol: { // <- name of the field
required: true,
vsymbol: true // <- name of the rule
}
}
});
});
</script>
You may want to read this regarding your use of Allman coding style within JavaScript .
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