<if>
<if>
The <if>
element is used for conditional logic. It has optional <else>
and <elseif>
elements.
Attributes
cond
An ECMAScript expression to evaluate.
Notes
Note that the <else>
and <elseif>
tags both must contain a trailing forward slash to terminate.
<if cond="number==5">
<!-- do something -->
<elseif cond="number==2"/>
<!-- do something else -->
<else/>
<!-- do something for all other cases -->
</if>
Example
<?xml version="1.0"?>
<vxml version="2.0">
<form>
<field name="myprompt" type="digits">
<prompt>
Say the magic number between 1 and 9.
</prompt>
<filled>
<!-- The "cond" attribute within an "if" tag -->
<!-- should contain a boolean ECMAscript expression. -->
<if cond="myprompt==5">
<prompt>
You guessed correctly!
</prompt>
<elseif cond="myprompt==4 || myprompt==6"/>
<prompt>
You're close. Try again.
</prompt>
<clear namelist="myprompt"/>
<else/>
<prompt>
Try again.
</prompt>
<clear namelist="myprompt"/>
</if>
</filled>
</field>
</form>
</vxml>
The output of the above script would be:
Computer: Say the magic number between one and nine. Human: Three. Computer: Try again. Say the magic number between one and nine. Human: Six. Computer: You're close. Try again. Say the magic number between one and nine. Human: Five. Computer: You guessed correctly!
Child Tags
<audio>, <assign>, <clear>, <data>, <disconnect>, <else>, <elseif>, <enumerate>, <exit>, <foreach>, <goto>, <if>, <log>, <prompt>, <reprompt>, <return>, <script>, <submit>, <throw>, <value>, <var>
Parent Tags
<block>, <catch>, <error>, <filled>, <foreach>, <help>, <if>, <noinput>, <nomatch>
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