JS Tutorial
- Overview
- Documents
jsGrid is a lightweight client-side data grid control based on jQuery. It supports basic grid operations like inserting, filtering, editing, deleting, paging and sorting. jsGrid is flexible and allows to customize appearance and components.
What jsGrid can
- Filtering: jsGrid supports data filtering according to specified criteria.
- Data Editing: jsGrid allows to add new records, update and remove data items.
- Paging: jsGrid has flexible pager allowing to display and even load data by specified page size.
- Fields: jsGrid has different column types supporting text, numeric, select, checkbox and other fields.
- Data Sources: jsGrid perfectly work with any type of data source from static array to any REST-service
- Sorting: jsGrid supports sorting with user interaction and with api.
Compatibility
Desktop
- Chrome
- Safari
- Firefox
- Opera 15+
- IE 8+
Mobile
- Safari for iOS
- Chrome for Android
- IE10 for WP8
Look at jsGrid in Action
Source: js-grid.com
1. INCLUDE CSS AND JS FILES
<link rel="stylesheet" type="text/css" href="../css/jsgrid.css" /> <link rel="stylesheet" type="text/css" href="../css/theme.css" /> <script src="../external/jquery/jquery-1.8.3.js"></script> <script src="db.js"></script> <script src="../src/jsgrid.core.js"></script> <script src="../src/jsgrid.load-indicator.js"></script> <script src="../src/jsgrid.load-strategies.js"></script> <script src="../src/jsgrid.sort-strategies.js"></script> <script src="../src/jsgrid.field.js"></script> <script src="../src/jsgrid.field.text.js"></script> <script src="../src/jsgrid.field.number.js"></script> <script src="../src/jsgrid.field.select.js"></script> <script src="../src/jsgrid.field.checkbox.js"></script> <script src="../src/jsgrid.field.control.js"></script>
2. HTML
<div id="jsGrid"></div>
3. JAVASCRIPT
$(function() {
$("#jsGrid").jsGrid({
height: "70%",
width: "100%",
filtering: true,
editing: true,
sorting: true,
paging: true,
autoload: true,
pageSize: 15,
pageButtonCount: 5,
deleteConfirm: "Do you really want to delete the client?",
controller: db,
fields: [
{ name: "Name", type: "text", width: 150 },
{ name: "Age", type: "number", width: 50 },
{ name: "Address", type: "text", width: 200 },
{ name: "Country", type: "select", items: db.countries, valueField: "Id", textField: "Name" },
{ name: "Married", type: "checkbox", title: "Is Married", sorting: false },
{ type: "control" }
]
});
});
4. OPTIONS
The config object may contain following options (default values are specified below):
{
fields: [],
data: [],
autoload: false,
controller: {
loadData: $.noop,
insertItem: $.noop,
updateItem: $.noop,
deleteItem: $.noop
},
width: "auto",
height: "auto",
heading: true,
filtering: false,
inserting: false,
editing: false,
selecting: true,
sorting: false,
paging: false,
pageLoading: false,
rowClass: function(item, itemIndex) { ... },
rowClick: function(args) { ... },
noDataContent: "Not found",
confirmDeleting: true,
deleteConfirm: "Are you sure?",
pagerContainer: null,
pageIndex: 1,
pageSize: 20,
pageButtonCount: 15,
pagerFormat: "Pages: {first} {prev} {pages} {next} {last} {pageIndex} of {pageCount}",
pagePrevText: "Prev",
pageNextText: "Next",
pageFirstText: "First",
pageLastText: "Last",
pageNavigatorNextText: "...",
pageNavigatorPrevText: "...",
loadIndication: true,
loadIndicationDelay: 500,
loadMessage: "Please, wait...",
loadShading: true,
updateOnResize: true,
rowRenderer: null,
headerRowRenderer: null,
filterRowRenderer: null,
insertRowRenderer: null,
editRowRenderer: null
}
fields
An array of fields (columns) of the grid.
Each field has general options and specific options depending on field type.
General options peculiar to all field types:
{
type: "",
name: "",
title: "",
css: "",
align: "",
width: 100,
filtering: true,
inserting: true,
editing: true,
sorting: true,
sorter: "string",
headerTemplate: function() { ... },
itemTemplate: function(value, item) { ... },
filterTemplate: function() { ... },
insertTemplate: function() { ... },
editTemplate: function(value, item) { ... },
filterValue: function() { ... },
insertValue: function() { ... },
editValue: function() { ... },
cellRenderer: null
}
- type is a string key of field ("text"|"number"|"checkbox"|"select"|"textarea"|"control") in fields registry jsGrid.fields (the registry can be easily extended with custom field types).
- name is a property of data item associated with the column.
- title is a text to be displayed in the header of the column. If title is not specified, the name will be used instead.
- css is a string representing css classes to be attached to the table cell.
- align is alignment of text in the cell. Accepts following values "left"|"center"|"right".
- width is a width of the column.
- filtering is a boolean specifying whether or not column has filtering (filterTemplate() is rendered and filterValue() is included in load filter object).
- inserting is a boolean specifying whether or not column has inserting (insertTemplate() is rendered and insertValue() is included in inserting item).
- editing is a boolean specifying whether or not column has editing (editTemplate() is rendered and editValue() is included in editing item).
- sorting is a boolean specifying whether or not column has sorting ability.
- sorter is a string or a function specifying how to sort item by the field. The string is a key of sorting strategy in the registry jsGrid.sortStrategies (the registry can be easily extended with custom sorting functions). Sorting function has the signature function(value1, value2) { return -1|0|1; }.
- headerTemplate is a function to create column header content. It should return markup as string, DomNode or jQueryElement.
- itemTemplate is a function to create cell content. It should return markup as string, DomNode or jQueryElement. The function signature is function(value, item), where value is a value of column property of data item, and item is a row data item.
- filterTemplate is a function to create filter row cell content. It should return markup as string, DomNode or jQueryElement.
- insertTemplate is a function to create insert row cell content. It should return markup as string, DomNode or jQueryElement.
- editTemplate is a function to create cell content of editing row. It should return markup as string, DomNode or jQueryElement. The function signature is function(value, item), where value is a value of column property of data item, and item is a row data item.
- filterValue is a function returning the value of filter property associated with the column.
- insertValue is a function returning the value of inserting item property associated with the column.
- editValue is a function returning the value of editing item property associated with the column.
- cellRenderer is a function to customize cell rendering. The function signature is function(value, item), where value is a value of column property of data item, and item is a row data item. The function should return markup as a string, jQueryElement or DomNode representing table cell td.
Specific field options depends on concrete field type. Read about build-in fields in Grid Fields section.
data
An array of items to be displayed in the grid. The option should be used to provide static data. Use thecontroller option to provide non static data.
autoload (default false)
A boolean value specifying whether controller.loadData will be called when grid is rendered.
controller
An object or function returning an object with the following structure:
{
loadData: $.noop,
insertItem: $.noop,
updateItem: $.noop,
deleteItem: $.noop
}
- loadData is a function returning an array of data or jQuery promise that will be resolved with an array of data (when pageLoading is true instead of object the structure { data: [items], itemsCount: [total items count] } should be returned). Accepts filter parameter including current filter options and paging parameters when pageLoading is true.
- insertItem is a function returning inserted item or jQuery promise that will be resolved with inserted item. Accepts inserting item object.
- updateItem is a function returning updated item or jQuery promise that will be resolved with updated item. Accepts updating item object.
- deleteItem is a function deleting item. Returns jQuery promise that will be resolved when deletion is completed. Accepts deleting item object.
Read more about controller interface in Grid Controller section.
width (default: "auto")
Specifies the overall width of the grid. Accepts all value types accepting by jQuery.width.
height (default: "auto")
Specifies the overall height of the grid including the pager. Accepts all value types accepting byjQuery.height.
heading (default: true)
A boolean value specifies whether to show grid header or not.
filtering (default: false)
A boolean value specifies whether to show filter row or not.
inserting (default: false)
A boolean value specifies whether to show inserting row or not.
editing (default: false)
A boolean value specifies whether editing is allowed.
selecting (default: true)
A boolean value specifies whether to highlight grid rows on hover.
sorting (default: false)
A boolean value specifies whether sorting is allowed.
paging (default: false)
A boolean value specifies whether data is displayed by pages.
pageLoading (default: false)
A boolean value specifies whether to load data by page. When pageLoading is true the loadDatamethod of controller accepts filter parameter with two additional properties pageSize andpageIndex.
rowClass
A string or a function specifying row css classes. A string contains classes separated with spaces. A function has signature function(item, itemIndex). It accepts the data item and index of the item. It should returns a string containing classes separated with spaces.
rowClick
A function handling row click. Accepts single argument with following structure:
{
item // data item
itemIndex // data item index
event // jQuery event
}
By default rowClick performs row editing when editing is true.
noDataContent (default "Not found")
A string or a function returning a markup, jQueryElement or DomNode specifying the content to be displayed when data is an empty array.
confirmDeleting (default true)
A boolean value specifying whether to ask user to confirm item deletion.
deleteConfirm (default "Are you sure?")
A string or a function returning string specifying delete confirmation message to be displayed to the user. A function has the signature function(item) and accepts item to be deleted.
pagerContainer (default null)
A jQueryElement or DomNode to specify where to render a pager. Used for external pager rendering. When it is equal to null, the pager is rendered at the bottom of the grid.
pageIndex (default 1)
An integer value specifying current page index. Applied only when paging is true.
pageSize (default 20)
An integer value specifying the amount of items on the page. Applied only when paging is true.
pageButtonCount (default 15)
An integer value specifying the maximum amount of page buttons to be displayed in the pager.
pagerFormat
A string specifying pager format. The default value is "Pages: {first} {prev} {pages} {next} {last} {pageIndex} of {pageCount}"
There are placeholders that can be used in the format:
{first} // link to first page
{prev} // link to previous page
{pages} // page links
{next} // link to next page
{last} // link to last page
{pageIndex} // current page index
{pageCount} // total amount of pages
pageNextText (default "Next")
A string specifying the text of the link to the next page.
pagePrevText (default "Prev")
A string specifying the text of the link to the previous page.
pageFirstText (default "First")
A string specifying the text of the link to the first page.
pageLastText (default "Last")
A string specifying the text of the link to the last page.
pageNavigatorNextText (default "...")
A string specifying the text of the link to move to next set of page links, when total amount of pages more than pageButtonCount.
pageNavigatorPrevText (default "...")
A string specifying the text of the link to move to previous set of page links, when total amount of pages more than pageButtonCount.
loadIndication (default true)
A boolean value specifying whether to show loading indication during controller operations execution.
loadIndicationDelay (default 500)
An integer value specifying the delay in ms before showing load indication. Applied only whenloadIndication is true.
loadMessage (default "Please, wait...")
A string specifying the text of loading indication panel. Applied only when loadIndication is true.
loadShading (default true)
A boolean value specifying whether to show overlay (shader) over grid content during loading indication. Applied only when loadIndication is true.
updateOnResize (default true)
A boolean value specifying whether to refresh grid on window resize event.
rowRenderer (default null)
A function to customize row rendering. The function signature is function(item, itemIndex), whereitem is row data item, and itemIndex is the item index. The function should return markup as a string, jQueryElement or DomNode representing table row tr.
headerRowRenderer (default null)
A function to customize grid header row. The function should return markup as a string, jQueryElement or DomNode representing table row tr.
filterRowRenderer (default null)
A function to customize grid filter row. The function should return markup as a string, jQueryElement or DomNode representing table row tr.
insertRowRenderer (default null)
A function to customize grid inserting row. The function should return markup as a string, jQueryElement or DomNode representing table row tr.
editRowRenderer (default null)
A function to customize editing row rendering. The function signature is function(item, itemIndex), where item is row data item, and itemIndex is the item index. The function should return markup as a string, jQueryElement or DomNode representing table row tr.
5. GRID FIELDS
All fields supporting by grid are stored in jsGrid.fields object, where key is a type of the field and the value is the field class.
jsGrid.fields contains following build-in fields:
{
text: { ... }, // simple text input
number: { ... }, // number input
select: { ... }, // select control
checkbox: { ... }, // checkbox input
textarea: { ... }, // textarea control (renders textarea for inserting and editing and text input for filtering)
control: { ... } // control field with delete and editing buttons for data rows, search and add buttons for filter and inserting row
}
Each build-in field can be easily customized with general configuration properties described in fields section and custom field-specific properties described below.
text
Text field renders <input type="text"> in filter, inserting and editing rows.
Custom properties:
{
autosearch: true // triggers searching when the user presses `enter` key in the filter input
}
number
Number field renders <input type="number"> in filter, inserting and editing rows.
Custom properties:
{
sorter: "number", // uses sorter for numbers
align: "right" // right text alignment
}
select
Select field renders <select> control in filter, inserting and editing rows.
Custom properties:
{
align: "center", // center text alignment
autosearch: true, // triggers searching when the user changes the selected item in the filter
items: [], // an array of items for select
valueField: "", // name of property of item to be used as value
textField: "", // name of property of item to be used as displaying value
selectedIndex: -1 // index of selected item by default
}
If valueField is not defined, then the item index is used instead. If textField is not defined, then item itself is used to display value.
For instance the simple select field config may look like:
{
name: "Country",
type: "select",
items: [ "", "United States", "Canada", "United Kingdom" ]
}
or more complex with items as objects:
{
name: "Country",
type: "select"
items: [
{ Name: "", Id: 0 },
{ Name: "United States", Id: 1 },
{ Name: "Canada", Id: 2 },
{ Name: "United Kingdom", Id: 3 }
],
valueField: "Id",
textField: "Name"
}
checkbox
Checkbox field renders <input type="checkbox"> in filter, inserting and editing rows. Filter checkbox supports intermediate state for, so click switches between 3 states (checked|intermediate|unchecked).
Custom properties:
{
sorter: "number", // uses sorter for numbers
align: "center" // center text alignment
autosearch: true // triggers searching when the user clicks checkbox in filter
}
textarea
Textarea field renders 'in inserting and editing rows and` in filter row.
Custom properties:
{
autosearch: true // triggers searching when the user presses `enter` key in the filter input
}
control
Control field renders delete and editing buttons in data row, search and add buttons in filter and inserting row accordingly. It also renders button switching between filtering and searching in header row.
Custom properties:
{
editButton: true, // show edit button
deleteButton: true, // show delete button
clearFilterButton: true, // show clear filter button
modeSwitchButton: true, // show switching filtering/inserting button
align: "center", // center content alignment
width: 50, // default column width is 50px
filtering: false, // disable filtering for column
inserting: false, // disable inserting for column
editing: false, // disable editing for column
sorting: false, // disable sorting for column
searchModeButtonTooltip: "Switch to searching", // tooltip of switching filtering/inserting button in inserting mode
insertModeButtonTooltip: "Switch to inserting", // tooltip of switching filtering/inserting button in filtering mode
editButtonTooltip: "Edit", // tooltip of edit item button
deleteButtonTooltip: "Delete", // tooltip of delete item button
searchButtonTooltip: "Search", // tooltip of search button
clearFilterButtonTooltip: "Clear filter", // tooltip of clear filter button
insertButtonTooltip: "Insert", // tooltip of insert button
updateButtonTooltip: "Update", // tooltip of update item button
cancelEditButtonTooltip: "Cancel edit", // tooltip of cancel editing button
}
Custom Field
If you need a completely custom field, the object jsGrid.fields can be easily extended.
In this example we define new grid field date:
var MyDateField = function(config) {
jsGrid.Field.call(this, config);
};
MyDateField.prototype = new jsGrid.Field({
css: "date-field", // redefine general property 'css'
align: "center", // redefine general property 'align'
myCustomProperty: "foo", // custom property
sorter: function(date1, date2) {
return new Date(date1) - new Date(date2);
},
itemTemplate: function(value) {
return new Date(value).toDateString();
},
insertTemplate: function(value) {
return this._insertPicker = $("<input>").datepicker({ defaultDate: new Date() });
},
editTemplate: function(value) {
return this._editPicker = $("<input>").datepicker().datepicker("setDate", new Date(value));
},
insertValue: function() {
return this._insertPicker.datepicker("getDate").toISOString();
},
editValue: function() {
return this._editPicker.datepicker("getDate").toISOString();
}
});
jsGrid.fields.date = MyDateField;
To have all general grid field properties custom field class should inherit jsGrid.Field class or any other field class. Here itemTemplate just returns the string representation of a date. insertTemplateand editTemplate create jQuery UI datePicker for inserting and editing row. Of course jquery ui library should be included to make it work. insertValue and editValue return date to insert and update items accordingly. We also defined date specific sorter.
Now, our new field date can be used in the grid config as follows:
{
fields: [
...
{ type: "date", myCustomProperty: "bar" },
...
]
}
6. METHODS
jsGrid methods could be called with jsGrid jQuery plugin or directly.
To use jsGrid plugin to call a method, just call jsGrid with method name and required parameters as next arguments:
// calling method with jQuery plugin
$("#grid").jsGrid("methodName", param1, param2);
To call method directly you need to retrieve grid instance or just create grid with the constructor:
// retrieve grid instance from element data
var grid = $("#grid").data("JSGrid");
// create grid with the constructor
var grid = new jsGrid.Grid($("#grid"), { ... });
// call method directly
grid.methodName(param1, param2);
cancelEdit()
Cancels row editing.
$("#grid").jsGrid("cancelEdit");
clearFilter(): Promise
Clears current filter and performs search with empty filter. Returns jQuery promise resolved when data filtering is completed.
$("#grid").jsGrid("clearFilter").done(function() {
console.log("filtering completed");
});
clearInsert()
Clears current inserting row.
$("#grid").jsGrid("clearInsert");
deleteItem(item|$row|rowNode): Promise
Removes specified row from the grid. Returns jQuery promise resolved when deletion is completed.
item|$row|rowNode is the reference to the item or the row jQueryElement or the row DomNode.
// delete row by item reference
$("#grid").jsGrid("deleteItem", item);
// delete row by jQueryElement
$("#grid").jsGrid("deleteItem", $(".specific-row"));
// delete row by DomNode
$("#grid").jsGrid("deleteItem", rowNode);
destroy()
Destroys the grid and brings the Node to its original state.
$("#grid").jsGrid("destroy");
editItem(item|$row|rowNode)
Sets grid editing row.
item|$row|rowNode is the reference to the item or the row jQueryElement or the row DomNode.
// edit row by item reference
$("#grid").jsGrid("editItem", item);
// edit row by jQueryElement
$("#grid").jsGrid("editItem", $(".specific-row"));
// edit row by DomNode
$("#grid").jsGrid("editItem", rowNode);
insertItem([item]): Promise
Inserts row into the grid based on item. Returns jQuery promise resolved when insertion is completed.
item is the item to pass to controller.insertItem.
If item is not specified the data from inserting row will be inserted.
// insert item from inserting row
$("#grid").jsGrid("insertItem");
// insert item
$("#grid").jsGrid("insertItem", { Name: "John", Age: 25, Country: 2 }).done(function() {
console.log("insertion completed");
});
openPage(pageIndex)
Opens the page of specified index.
pageIndex is one-based index of the page to open. The value should be in range from 1 to [total amount of pages].
option(key, [value])
Gets or sets the value of an option.
key is the name of the option.
value is the new option value to set.
If value is not specified, then the value of the option key will be returned.
// turn off paging
$("#grid").jsGrid("option", "paging", false);
// get current page index
var pageIndex = $("#grid").jsGrid("option", "pageIndex");
refresh()
Refreshes the grid. Renders the grid body and pager content, recalculates sizes.
$("#grid").jsGrid("refresh");
render(): Promise
Performs complete grid rendering. If option autoload is true calls controller.loadData. The state of the grid like current page and sorting is retained. Returns jQuery promise resolved when data loading is completed. If auto-loading is disabled the promise is instantly resolved.
$("#grid").jsGrid("render").done(function() {
console.log("rendering completed and data loaded");
});
reset()
Resets the state of the grid. Goes to the first data page, resets sorting, and then calls refresh.
$("#grid").jsGrid("reset");
search([filter]): Promise
Performs filtering of the grid. Returns jQuery promise resolved when data loading is completed.
filter is a filter to pass to controller.loadData.
If filter is not specified the current filter (filtering row values) will be applied.
// search with current grid filter
$("#grid").jsGrid("search");
// search with custom filter
$("#grid").jsGrid("search", { Name: "John" }).done(function() {
console.log("filtering completed");
});
showPrevPages()
Shows previous set of pages, when total amount of pages more than pageButtonCount.
$("#grid").jsGrid("showPrevPages");
showNextPages()
Shows next set of pages, when total amount of pages more than pageButtonCount.
$("#grid").jsGrid("showNextPages");
sort(sortConfig|field, [order]): Promise
Sorts grid by specified field. Returns jQuery promise resolved when sorting is completed.
sortConfig is the plain object of the following structure { field: (fieldIndex|fieldName|field), order: ("asc"|"desc") }
field is the field to sort by. It could be zero-based field index or field name or field reference
order is the sorting order. Accepts the following values: "asc"|"desc"
If order is not specified, then data is sorted in the reversed to current order, when grid is already sorted by the same field. Or "asc" for sorting by another field.
When grid data is loaded by pages (pageLoading is true) sorting calls controller.loadData with sorting parameters. Read more in Grid Controller section.
// sorting grid by first field
$("#grid").jsGrid("sort", 0);
// sorting grid by field "Name" in descending order
$("#grid").jsGrid("sort", { field: "Name", order: "desc" });
// sorting grid by myField in ascending order
$("#grid").jsGrid("sort", myField, "asc").done(function() {
console.log("sorting completed");
});
updateItem([item|$row|rowNode], [editedItem]): Promise
Updates item and row of the grid. Returns jQuery promise resolved when update is completed.
item|$row|rowNode is the reference to the item or the row jQueryElement or the row DomNode.
editedItem is the changed item to pass to controller.updateItem.
If item|$row|rowNode is not specified then editing row will be updated.
If editedItem is not specified the data from editing row will be taken.
// update currently editing row
$("#grid").jsGrid("updateItem");
// update currently editing row with specified data
$("#grid").jsGrid("updateItem", { ID: 1, Name: "John", Age: 25, Country: 2 });
// update specified item with particular data (row DomNode or row jQueryElement can be used instead of item reference)
$("#grid").jsGrid("updateItem", item, { ID: 1, Name: "John", Age: 25, Country: 2 }).done(function() {
console.log("update completed");
});
7. CALLBACKS
onDataLoading
Fires before data loading.
Has following arguments:
{
grid // grid instance
filter // loading filter object
}
onDataLoaded
Fires after data loading.
Has following arguments:
{
grid // grid instance
data // load result (array of items or data structure for loading by page scenario)
}
onError
Fires when controller handler promise failed.
Has following arguments:
{
grid // grid instance
args // an array of arguments provided to fail promise handler
}
onItemDeleting
Fires before item deletion.
Has following arguments:
{
grid // grid instance
row // deleting row jQuery element
item // deleting item
itemIndex // deleting item index
}
onItemDeleted
Fires after item deletion.
Has following arguments:
{
grid // grid instance
row // deleted row jQuery element
item // deleted item
itemIndex // deleted item index
}
onItemInserting
Fires before item insertion.
Has following arguments:
{
grid // grid instance
item // inserting item
}
onItemInserted
Fires after item insertion.
Has following arguments:
{
grid // grid instance
item // inserted item
}
onItemUpdating
Fires before item update.
Has following arguments:
{
grid // grid instance
row // updating row jQuery element
item // updating item
itemIndex // updating item index
}
onItemUpdated
Fires after item update.
Has following arguments:
{
grid // grid instance
row // updated row jQuery element
item // updated item
itemIndex // updated item index
}
onOptionChanging
Fires before grid option value change.
Has following arguments:
{
grid // grid instance
option // name of option to be changed
oldValue // old value of option
newValue // new value of option
}
onOptionChanged
Fires after grid option value change.
Has following arguments:
{
grid // grid instance
option // name of changed option
value // changed option value
}
onRefreshing
Fires before grid refresh.
Has following arguments:
{
grid // grid instance
}
onRefreshed
Fires after grid refresh.
Has following arguments:
{
grid // grid instance
}
Grid Controller
The controller is a gateway between grid and data storage. All data manipulations call accordant controller methods. By default grid has an empty controller and can work with static array of items stored in option data.
A controller should implement following interface:
{
loadData: function(filter) { ... },
insertItem: function(item) { ... },
updateItem: function(item) { ... },
deleteItem: function(item) { ... }
}
For instance the controller for typical REST service might look like:
{
loadData: function(filter) {
return $.ajax({
type: "GET",
url: "/items",
data: filter,
dataType: "json"
});
},
insertItem: function(item) {
return $.ajax({
type: "POST",
url: "/items",
data: item,
dataType: "json"
});
},
updateItem: function(item) {
return $.ajax({
type: "PUT",
url: "/items",
data: item,
dataType: "json"
});
},
deleteItem: function(item) {
return $.ajax({
type: "DELETE",
url: "/items",
data: item,
dataType: "json"
});
},
}
loadData(filter): Promise|dataResult
Called on data loading.
filter contains all filter parameters of fields with enabled filtering
When pageLoading is true and data is loaded by page, filter includes two more parameters:
{
pageIndex // current page index
pageSize // the size of page
}
When grid sorting is enabled, filter includes two more parameters:
{
sortField // the name of sorting field
sortOrder // the order of sorting as string "asc"|"desc"
}
Method should return dataResult or jQuery promise that will be resolved with dataResult.
dataResult depends on pageLoading. When pageLoading is false (by default), then data result is a plain javascript array of objects. If pageLoading is true data result should have following structure
{
data // array of items
itemsCount // total items amount in storage
}
insertItem(item): Promise|insertedItem
Called on item insertion.
Method should return insertedItem or jQuery promise that will be resolved with insertedItem. If no item is returned, inserting item will be used as inserted item.
item is the item to be inserted.
updateItem(item): Promise|updatedItem
Called on item update.
Method should return updatedItem or jQuery promise that will be resolved with updatedItem. If no item is returned, updating item will be used as updated item.
item is the item to be updated.
deleteItem(item): Promise
Called on item deletion.
If deletion is asynchronous, method should return jQuery promise that will be resolved when deletion is completed.
item is the item to be deleted.
Sorting Strategies
All supported sorting strategies are stored in jsGrid.sortStrategies object, where key is a name of the strategy and the value is a sortingFunction.
jsGrid.sortStrategies contains following build-in sorting strategies:
{
string: { ... }, // string sorter
number: { ... }, // number sorter
date: { ... }, // date sorter
numberAsString: { ... } // numbers are parsed before comparison
}
sortingFunction is a sorting function with the following format:
function(value1, value2) {
if(value1 < value2) return -1; // return negative value when first is less than second
if(value1 === value2) return 0; // return zero if values are equal
if(value1 > value2) return 1; // return positive value when first is greater than second
}
Custom Sorting Strategy
If you need a custom sorting strategy, the object jsGrid.sortStrategies can be easily extended.
In this example we define new sorting strategy for our client objects:
// client object format
var clients = [{
Name: "John",
Age: 25
}, ...];
// sort clients by name and then by age
jsGrid.sortStrategies.client = function(client1, client2) {
return client1.Name.localeCompare(client2.Name)
|| client1.Age - client2.Age;
};
Now, our new sorting strategy client can be used in the grid config as follows:
{
fields: [
...
{ type: "text", name: "Name", sorter: "client" },
...
]
}
Worth to mention, that if you need particular sorting only once, you can just inline sorting function insorter not registering the new strategy:
{
fields: [
...
{
type: "text",
name: "Name",
sorter: function(client1, client2) {
return client1.Name.localeCompare(client2.Name)
|| client1.Age - client2.Age;
}
},
...
]
}
