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### Field

A field is similar to a property, except that should not have a getter or setter. It is useful as a simple holder for a value.

The field element may have content which is code that determines the initial value of the field.

More information about field

Attributes:

id | name | readonly

#### Attributes:

##### id

Type: element id, must be unique in the window

A unique identifier so that you can identify the field with. You can use this as a parameter to getElementById and other DOM functions and to reference the element in style sheets.

##### name

The name of the field, which is the name that can be used via a script. For example, if a field has the name width, it can be accessed with object.width, where object is a reference to the object.

##### readonly

If set to true, the value of the field cannot be changed. If set to false, the field may be changed.

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