特殊字符验证 [英] Special character validation

问题描述

我写了一些JavaScript来验证字符串是字母数字，但我只是想知道如何添加一些代码来包含连字符（ - ）和斜线（/）作为可接受的输入。这是我现在的代码：
$ b $ pre $ function validateAddress（）{
var address = document.getElementById（'address'） ;

if（address.value ==）{
alert（Address must be filled out）;
返回false;
} else（document.getElementById（'address'）.value.length> 150）{
alert（地址不能超过150个字符）;
返回false;
} else if（/[^a-zA-Z0-9\-\\\/]/.test(address））{
alert（'地址只能包含字母数字字符，连字符（ - ）和反斜杠（\）'）;
返回false;


$ / code $ / pre


解决方案

将它们添加到字符组中。当然，因为 - 和 / 在这个上下文中是特殊字符（ / 结束RegExp， - 表示一个范围），您需要使用前面的 \
$ $ $ $ $ $ $ $ $ $ $ $ $ $ $变量TCode = document.getElementById（'address'）。value ; （$ [
$ b $ if（/ [^ a-zA-Z0-9\ -\ /] /。test（TCode））{
alert（'Input is not alphanumeric'）;
返回false;
}

返回true;
}





I have some javascript written to validate that a string is alphanumeric but i was just wondering how i could add some code to include hyphens(-) and slash's(/) as acceptable inputs. Here is my current code:

function validateAddress() {
  var address = document.getElementById('address');

  if (address.value == "") {
    alert("Address must be filled out");
    return false;
  } else if (document.getElementById('address').value.length > 150) {
    alert("Address cannot be more than 150 characters");
    return false;
  } else if (/[^a-zA-Z0-9\-\/]/.test(address)) {
    alert('Address can only contain alphanumeric characters, hyphens(-) and back slashs(\)');
    return false;
  }
}

解决方案

Simply add them to the character group. Of course, because both - and / are special characters in this context (/ ends a RegExp, - expresses a range), you'll need to escape them with a preceding \:

function validateAddress(){
    var TCode = document.getElementById('address').value;

    if( /[^a-zA-Z0-9\-\/]/.test( TCode ) ) {
        alert('Input is not alphanumeric');
        return false;
    }

    return true;     
}

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