Dynamic Values

In some cases, you might want to include values that depend on client-side user input (e.g., write a pd_script that executes a query provided as input by the user). To do that, you can use the "$val(<id>)" directive, which acts as a macro that will be resolved at the time the kernel request is executed.

“$val(<id>)” takes one argument that can be one of the following:

• html element id: The macro is replaced by the value of the HTML element specified by the id. For example:

<pd_script>
self.executeQuery("$val(inputId)")
</pd_script>

• JavaScript function: The macro is replaced by the value returned by the specified JavaScript function. For example:

<script>
function resValue(){
  return "my_query";
}
</script>

...

<pd_script>
self.executeQuery("$val(resValue)")
</pd_script>

Note

dynamic values are currently supported in pd_options and pd_script.