如何在离子1中仅允许一个小数点输入类型编号 [英] How to allow only one decimal point for input of type number in ionic 1

问题描述

我正在使用类型编号的输入，它允许多个小数点，所以我尝试使用正则表达式不允许超过一个小数点，但即使使用正则表达式我面临相同的问题，任何人都可以告诉我如何在ionic1中输入类型编号只允许一个小数点

Html：

 <输入stopccp focus-me class =inputContainer trade_inputtype =numbername =ng-model =vm.total_amount [$ index]ng-change =vm.onTotalCost（） limit-char limit =5ng-keyup =vm.decimalcheck（vm.total_amount [$ index]）> 
  

函数中的正则表达式：

  function decimalcheck（element）{
 $ log.log（'decimalcheck got called'，element）; 
 var regex = /\d*\.?\d?/g; 
 return regex.exec（element）; 
} 
  

解决方案

试试这个Regex：

  ^ \d * \。？\ d + $ 
  

I am using a input of type number in which it allows multiple decimal points so i have tried using the regex not to allow more than one decimal point but even after using the regex i am facing the same issue can anyone tell me how to allow only one decimal point in input of type number in ionic1

Html:

<input stopccp focus-me class="inputContainer trade_input" type="number" name="" ng-model="vm.total_amount[$index]" ng-change="vm.onTotalCost()" limit-char limit="5" ng-keyup="vm.decimalcheck(vm.total_amount[$index])"  >

Regex in function:

function decimalcheck (element) {
  $log.log('decimalcheck got called', element);
  var regex = /\d*\.?\d?/g;
  return regex.exec(element);
}

解决方案

Try this Regex:

^\d*\.?\d+$

Click for Demo

Explanation:

• ^ - Start of String
• \d*- 0+ digits
• \.?- 0 or 1 decimal point
• \d+- 1+ digits(thus making it mandatory to have atleast one digit after the decimal point, if it is present)
• $- End of String

OUTPUT:

这篇关于如何在离子1中仅允许一个小数点输入类型编号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！