Developer Function: Script: $p.events.before_send
## Overview
This explains how to specify a method to execute before sending data to the server. Use this to check whether the value entered in the field is correct.
## Syntax
##### JavaScript
```
$p.events.before_send = function (args) {
//Processing content
}
or
$p.events.before_send_{Value of the data-action attribute} = function (args) {
//Processing content
}
```
*Get this if you want to explicitly write the value of the data-action attribute of the button that will cause the event.
## Usage Example
After setting the following sample code to the Pleasanter script and setting the output destination to "Edit", enter 100 into Number A on the editing screen and press the "Update" button.
The value will be set in Class A only if it is entered correctly, and the screen will be updated (in this example, the value of the data-action attribute, Update, is explicitly stated).
##### JavaScript
```
$p.events.before_send_Update = function (args) {
if ($p.getControl('NumA').val() != 100) {
return false; //When it is false, the process stops and the update does not occur.
} else {
$p.set($p.getControl('ClassA'), 'The input was correct.')
return true; //If true, it will be updated.
}
}
```
## Related Information
[FAQ：$p.events.on_editor_loadを複数設定できるようにしたい](faq-multiple-on-editor-load)
