In most of the web applications, form in Ext.js are the most important widget to get the information from the user such as login form/feedback form of Ext.js so that the value can be saved in the database for future reference. Form widget is used for this purpose.
Before creating a form, we should know about xTypes.
xType defines the type of Ext JS UI component, which is determined during rendering of the component. For example, the element can be a textbox for which we have xType as textField or the element can have a numeric value only for which we have Numeric xType.
Different Types of xType
TEXTFIELD
This xType is to represent a text field, where the user can enter a value. Ext JS class for textfield is ‘Ext.Form.Field.Text’.
{
xtype: 'textfield',
fieldLabel: 'Text field'
}
TEXT AREA
This is to represent a text area. Ext JS class for this is ‘Ext.form.field.TextArea’.
{
xtype: 'textarea',
fieldLabel: 'Text Area'
}
DISPLAY FIELD
This is to represent a display text field. Ext JS class for this is ‘Ext.form.Label’.
{
xtype: 'displayfield',
fieldLabel: 'Display Field''
}
DATE FIELD
This is to represent a date field which has the date picker to select the date. Ext JS class for this is ‘Ext.form.field.Date’.
{
xtype: 'datefield',
fieldLabel: 'Date picker'
}
BUTTON
This is to represent a button. Ext JS class for this is ‘Ext.button.Button’.
{
xtype: 'button',
text : 'Button'
}
RADIO FIELD
This is to represent a radio field, where we can select any one among the all radio buttons or it can be customized to select multiple at a time. Ext JS class for this is ‘Ext.form.field.Radio’.
{
xtype : 'fieldcontainer',
fieldLabel : 'Radio field',
defaultType: 'radiofield',
defaults: {
flex: 1
},
layout: 'hbox',
items: [{
boxLabel : 'A',
inputValue: 'a',
id : 'radio1'
},{
boxLabel : 'B',
inputValue: 'b',
id : 'radio2'
},{
boxLabel : 'C',
inputValue: 'c',
id : 'radio3'
}]
}
CHECKBOX FIELD
This is to represent a checkbox field, where we can select multiple values at a time. Ext JS class for this is ‘Ext.form.field.Checkbox’.
{
xtype: 'fieldcontainer',
fieldLabel: 'Check Box Field',
defaultType: 'checkboxfield',
items: [{
boxLabel : 'HTML',
inputValue: 'html',
id : 'checkbox1'
},{
boxLabel : 'CSS',
inputValue: 'css',
checked : true,
id : 'checkbox2'
},{
boxLabel : 'JavaScript',
inputValue: 'js',
id : 'checkbox3'
}]
}
COMBO BOX
This is to represent a combo box. Combo box contains a list of items. Ext JS class for this is ‘Ext.form.field.ComboBox’.
{
xtype : 'combobox',
fieldLabel: 'Combo box',
store: store,
valueField: 'name'
}
// store for drop down values
var store = Ext.create('Ext.data.Store', {
id : 'statesid',
fields: ['abbr', 'name'],
data : [
{"abbr":"HTML", "name":"HTML"},
{"abbr":"CSS", "name":"CSS"},
{"abbr":"JS", "name":"JavaScript"}
]
});
TIME FIELD
This is to represent a time field, where max and min time value can be predefined. Ext JS class for this is ‘Ext.form.field.Time’.
{
xtype: 'timefield',
fieldLabel: 'Time field',
minValue: '6:00 AM',
maxValue: '8:00 PM',
increment: 30,
anchor: '100%'
}
FILE FIELD
This is to represent a file upload field where we can browse and upload files. Ext JS class for this is ‘Ext.form.field.File’.
{
xtype: 'filefield',
fieldLabel: 'File field',
labelWidth: 50,
msgTarget: 'side',
allowBlank: false,
anchor: '100%',
buttonText: 'Select File...'
}
SPINNER
This is to represent a spinner field, where the list can be spin and added. Ext JS class for this is ‘Ext.form.field.Spinner’.
{
xtype: 'spinnerfield',
fieldLabel: 'Spinner field'
}
NUMERIC FIELD
This is to represent a Numeric field, where we can have max and min value predefined. Ext JS class for this is ‘Ext.form.field.Number’.
{
xtype: 'numberfield',
anchor: '100%',
fieldLabel: 'Numeric field',
maxValue: 99,
minValue: 0
}
HIDDEN FIELD
As the name explains, this xtype is to keep values hidden.
{
xtype: 'hiddenfield',
value: 'value from hidden field'
}
Syntax for Form Panel
Following is a simple syntax to create a form.
Ext.create('Ext.form.Panel');
Example
Following is a simple example showing form with all the xTypes.
<!DOCTYPE html>
<html>
<head>
<link href = "https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/classic/theme-classic/resources/theme-classic-all.css"
rel = "stylesheet" />
<script type = "text/javascript"
src = "https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/ext-all.js"></script>
<script type = "text/javascript">
Ext.onReady(function() {
Ext.create('Ext.form.Panel', {
id: 'newForm',
renderTo: 'formId',
border: true,
width: 600,
items: [{
xtype: 'textfield',
fieldLabel: 'Text Field'
},{
xtype: 'displayfield',
fieldLabel: 'Display Field'
},{
xtype: 'textarea',
fieldLabel: 'Text Area'
},{
xtype: 'datefield',
fieldLabel: 'Date picker'
},{
xtype: 'button',
text: 'Button'
},{
xtype: 'fieldcontainer',
fieldLabel: 'Radio field',
defaultType: 'radiofield',
defaults: {
flex: 1
},
layout: 'hbox',
items: [{
boxLabel: 'A',
inputValue: 'a',
id: 'radio1'
},{
boxLabel: 'B',
inputValue: 'b',
id: 'radio2'
},{
boxLabel: 'C',
inputValue: 'c',
id: 'radio3'
}]
},{
xtype: 'fieldcontainer',
fieldLabel: 'Check Box Field',
defaultType: 'checkboxfield',
items: [{
boxLabel: 'HTML',
inputValue: 'html',
id: 'checkbox1'
},{
boxLabel: 'CSS',
inputValue: 'css',
checked: true,
id: 'checkbox2'
},{
boxLabel: 'JavaScript',
inputValue: 'js',
id: 'checkbox3'
}]
},{
xtype: 'hiddenfield',
name: 'hidden field ',
value: 'value from hidden field'
},{
xtype: 'numberfield',
anchor: '100%',
fieldLabel: 'Numeric Field',
maxValue: 99,
minValue: 0
},{
xtype: 'spinnerfield',
fieldLabel: 'Spinner Field',
step: 6,
// override onSpinUp (using step isn't necessary)
onSpinUp: function() {
var me = this;
if (!me.readOnly) {
var val = me.step; // set the default value to the step value
if(me.getValue() !== '') {
val = parseInt(me.getValue().slice(0, -5)); // gets rid of " Pack"
}
me.setValue((val + me.step) + ' Pack');
}
},
// override onSpinDown
onSpinDown: function() {
var me = this;
if (!me.readOnly) {
if(me.getValue() !== '') {
val = parseInt(me.getValue().slice(0, -5)); // gets rid of " Pack"
}
me.setValue((val - me.step) + ' Pack');
}
}
},{
xtype: 'timefield',
fieldLabel: 'Time field',
minValue: '6:00 AM',
maxValue: '8:00 PM',
increment: 30,
anchor: '100%'
},{
xtype: 'combobox',
fieldLabel: 'Combo Box',
store: Ext.create('Ext.data.Store', {
fields: ['abbr', 'name'],
data: [{
'abbr': 'HTML',
'name': 'HTML'
},{
'abbr': 'CSS',
'name': 'CSS'
},{
'abbr': 'JS',
'name': 'JavaScript'
}]
}),
valueField: 'abbr',
displayField: 'name'
},{
xtype: 'filefield',
fieldLabel: 'File field',
labelWidth: 50,
msgTarget: 'side',
allowBlank: false,
anchor: '100%',
buttonText: 'Select File...'
}]
});
});
</script>
</head>
<body>
<div id = "formId"></div>
</body>
</html>
The above program will produce the following result −
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