developer_guide:voicexml_references:elements:if

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developer_guide:voicexml_references:elements:if [2015/10/27 12:57] (current)
borja created
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 +====== < if > ======
  
 +===== Description =====
 +
 +The < if > element defines if-then-else conditional logic.
 +
 +===== Syntax =====
 +
 +<code>
 +<if
 +cond="ECMAScript_Expression">
 +child elements
 +</if>
 +</code>
 +
 +===== Attributes =====
 +
 +|cond|The cond attribute is a Boolean expression for the conditional logic statement. This attribute is required.|
 +
 +
 +===== Parents =====
 +
 +<code>
 +<block>, <catch>, <error>, <filled>, <help>, <if>, <noinput>, <nomatch>
 +</code>
 +
 +===== Children =====
 +
 +<code>
 +<assign>, <audio>, <clear>, <disconnect>, <else>, <elseif>, <enumerate>, <exit>, <goto>, <if>, <prompt>, <reprompt>, <return>, <script>, <submit>, <throw>, <value>, <var>
 +</code>
 +
 +===== Extensions =====
 +
 +<code>
 +None.
 +</code>
 +
 +===== Limitations/Restrictions =====
 +
 +<code>
 +None.
 +</code>
 +
 +===== Example Code =====
 +
 +<code>
 +<?xml version="1.0"?>
 +<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml">
 + <var name="card_type" expr="'amex'" />
 + <form>
 +  <field name="card_num" type="digits">
 +   <prompt>What is your card number?</prompt>
 +   <filled>
 +    <if cond="card_type == 'amex' &amp;&amp; card_num.length != 15">
 +     American Express card numbers must have 15 digits.
 +     <clear namelist="card_num"/>
 +    <elseif cond="card_type != 'amex' &amp;&amp; card_num.length != 16"/>
 +     Mastercard and Visa card numbers have 16 digits.
 +     <clear namelist="card_num"/>
 +    </if>
 +   </filled>
 +  </field>
 + </form>
 +</vxml>
 +</code>
  • developer_guide/voicexml_references/elements/if.txt
  • Last modified: 2015/10/27 12:57
  • by borja