Html 句柄浮点输入交叉串列器

在angular应用程序中，我需要将范围变量绑定到浮点用户输入

<my-float ng-model="myValue" name="floatValue"></my-float>
<button type="button" ng-disable="myValue.$invalid">Submit</submit>

使用html

 <input name="x" type="text" my-float ng-model="value">
 <div>error:{{f.x.$invalid}}</div>

错误：{f.x.$invalid}

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这里有一个

我想说的是，你把myValue作为字符串，为了有效性，你可以说：

1. if ( myValue[n-2] == ',' or myValue[n-3] ==',')
split the string into two by ,
else split the string into two by .
2. check second splited part is a number and length is less than two else invalid input 
3. check first part is number , If yes a valid input or else invalid

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我需要限制用户只看到允许的字符。。。所以我尝试使用$formatters和$render

1. if ( myValue[n-2] == ',' or myValue[n-3] ==',')
split the string into two by ,
else split the string into two by .
2. check second splited part is a number and length is less than two else invalid input 
3. check first part is number , If yes a valid input or else invalid