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## Overview of Glide class

**Glide class** works hand in hand with ServiceNow to use databases and perform operations on the UI objects and pages.

Glide mainly shares Javascript APIs to deal with front-end and back-end, resulting in a highly interactive and user-friendly application.

## Glide sub-classes

Glide classes are divided into two further categories: **client-side** and **server-side**. 

Let’s take a closer look at these.

#### Client-side classes include:
* GlideAjax
* GlideDialogWindow
* GlideForm
* GlideList2
* GlideMenu
* GlideUser

#### Server-side classes include:
* GlideRecord
* GlideElement
* GlideSystem
* GlideAggregate
* GlideDateTime

## Set field values
To set a value in the field, `setValue(name, value)` comes into play.  This function can be used from any of the sub-classes.





GlideClassElement.setValue(name, "value");


* `GlideClassElement` is the glide class sub-element that we need to set for GlideRecord, GlideForm, etc.
* `name` is the title of the field that we want to update. The data type of this field is `string`.
* `value` is the new value that we want to set. The data type of this field is `object`.
* The return type of this function is `void`.

## Get field values

To get a value, we use the `getValue(String name)` function. It returns a string containing the value of the field.
> `getValue(String name)` returns null if the field is empty or does not exist.

* `GlideClassElement` is the glide class sub-element that we need to get.
* `name` is the title of the field that we want to update. The data type of this field is `string`. 

How to get and set field values in ServiceNow

Utilize Glide classes in ServiceNow to set (`setValue(name, value)`) and get (`getValue(name)`) field values, handling both client-side and server-side objects.