Created a directive (ng-repeat with lazy loading)
जो डेटा को लोड करता है जब वह पृष्ठ के निचले हिस्से तक पहुंचता है और पहले से लोड किए गए डेटा के आधे को हटा देता है और जब यह फिर से पिछले डेटा के शीर्ष पर पहुंच जाता है (पृष्ठ संख्या के आधार पर) वर्तमान डेटा के आधे को हटाकर लोड किया जाएगा ताकि डोम पर एक समय में केवल सीमित डेटा मौजूद होता है जो लोड पर संपूर्ण डेटा रेंडर करने के बजाय बेहतर प्रदर्शन की ओर ले जाता है।
HTML कोड:
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script src="https://code.jquery.com/jquery-2.2.4.min.js" integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script>
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.20/angular.js" data-semver="1.3.20"></script>
<script src="app.js"></script>
</head>
<body ng-controller="ListController">
<div class="row customScroll" id="customTable" datafilter pagenumber="pageNumber" data="rowData" searchdata="searchdata" itemsPerPage="{{itemsPerPage}}" totaldata="totalData" selectedrow="onRowSelected(row,row.index)" style="height:300px;overflow-y: auto;padding-top: 5px">
<!--<div class="col-md-12 col-xs-12 col-sm-12 assign-list" ng-repeat="row in CRGC.rowData track by $index | orderBy:sortField:sortReverse | filter:searchFish">-->
<div class="col-md-12 col-xs-12 col-sm-12 pdl0 assign-list" style="padding:10px" ng-repeat="row in rowData" ng-hide="row[CRGC.columns[0].id]=='' && row[CRGC.columns[1].id]==''">
<!--col1-->
<div ng-click ="onRowSelected(row,row.index)"> <span>{{row["sno"]}}</span> <span>{{row["id"]}}</span> <span>{{row["name"]}}</span></div>
<!-- <div class="border_opacity"></div> -->
</div>
</div>
</body>
</html>
कोणीय कोड:
var app = angular.module('plunker', []);
var x;
ListController.$inject = ['$scope', '$timeout', '$q', '$templateCache'];
function ListController($scope, $timeout, $q, $templateCache) {
$scope.itemsPerPage = 40;
$scope.lastPage = 0;
$scope.maxPage = 100;
$scope.data = [];
$scope.pageNumber = 0;
$scope.makeid = function() {
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for (var i = 0; i < 5; i++)
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
}
$scope.DataFormFunction = function() {
var arrayObj = [];
for (var i = 0; i < $scope.itemsPerPage*$scope.maxPage; i++) {
arrayObj.push({
sno: i + 1,
id: Math.random() * 100,
name: $scope.makeid()
});
}
$scope.totalData = arrayObj;
$scope.totalData = $scope.totalData.filter(function(a,i){ a.index = i; return true; })
$scope.rowData = $scope.totalData.slice(0, $scope.itemsperpage);
}
$scope.DataFormFunction();
$scope.onRowSelected = function(row,index){
console.log(row,index);
}
}
angular.module('plunker').controller('ListController', ListController).directive('datafilter', function($compile) {
return {
restrict: 'EAC',
scope: {
data: '=',
totalData: '=totaldata',
pageNumber: '=pagenumber',
searchdata: '=',
defaultinput: '=',
selectedrow: '&',
filterflag: '=',
totalFilterData: '='
},
link: function(scope, elem, attr) {
//scope.pageNumber = 0;
var tempData = angular.copy(scope.totalData);
scope.totalPageLength = Math.ceil(scope.totalData.length / +attr.itemsperpage);
console.log(scope.totalData);
scope.data = scope.totalData.slice(0, attr.itemsperpage);
elem.on('scroll', function(event) {
event.preventDefault();
// var scrollHeight = angular.element('#customTable').scrollTop();
var scrollHeight = document.getElementById("customTable").scrollTop
/*if(scope.filterflag && scope.pageNumber != 0){
scope.data = scope.totalFilterData;
scope.pageNumber = 0;
angular.element('#customTable').scrollTop(0);
}*/
if (scrollHeight < 100) {
if (!scope.filterflag) {
scope.scrollUp();
}
}
if (angular.element(this).scrollTop() + angular.element(this).innerHeight() >= angular.element(this)[0].scrollHeight) {
console.log("scroll bottom reached");
if (!scope.filterflag) {
scope.scrollDown();
}
}
scope.$apply(scope.data);
});
/*
* Scroll down data append function
*/
scope.scrollDown = function() {
if (scope.defaultinput == undefined || scope.defaultinput == "") { //filter data append condition on scroll
scope.totalDataCompare = scope.totalData;
} else {
scope.totalDataCompare = scope.totalFilterData;
}
scope.totalPageLength = Math.ceil(scope.totalDataCompare.length / +attr.itemsperpage);
if (scope.pageNumber < scope.totalPageLength - 1) {
scope.pageNumber++;
scope.lastaddedData = scope.totalDataCompare.slice(scope.pageNumber * attr.itemsperpage, (+attr.itemsperpage) + (+scope.pageNumber * attr.itemsperpage));
scope.data = scope.totalDataCompare.slice(scope.pageNumber * attr.itemsperpage - 0.5 * (+attr.itemsperpage), scope.pageNumber * attr.itemsperpage);
scope.data = scope.data.concat(scope.lastaddedData);
scope.$apply(scope.data);
if (scope.pageNumber < scope.totalPageLength) {
var divHeight = $('.assign-list').outerHeight();
if (!scope.moveToPositionFlag) {
angular.element('#customTable').scrollTop(divHeight * 0.5 * (+attr.itemsperpage));
} else {
scope.moveToPositionFlag = false;
}
}
}
}
/*
* Scroll up data append function
*/
scope.scrollUp = function() {
if (scope.defaultinput == undefined || scope.defaultinput == "") { //filter data append condition on scroll
scope.totalDataCompare = scope.totalData;
} else {
scope.totalDataCompare = scope.totalFilterData;
}
scope.totalPageLength = Math.ceil(scope.totalDataCompare.length / +attr.itemsperpage);
if (scope.pageNumber > 0) {
this.positionData = scope.data[0];
scope.data = scope.totalDataCompare.slice(scope.pageNumber * attr.itemsperpage - 0.5 * (+attr.itemsperpage), scope.pageNumber * attr.itemsperpage);
var position = +attr.itemsperpage * scope.pageNumber - 1.5 * (+attr.itemsperpage);
if (position < 0) {
position = 0;
}
scope.TopAddData = scope.totalDataCompare.slice(position, (+attr.itemsperpage) + position);
scope.pageNumber--;
var divHeight = $('.assign-list').outerHeight();
if (position != 0) {
scope.data = scope.TopAddData.concat(scope.data);
scope.$apply(scope.data);
angular.element('#customTable').scrollTop(divHeight * 1 * (+attr.itemsperpage));
} else {
scope.data = scope.TopAddData;
scope.$apply(scope.data);
angular.element('#customTable').scrollTop(divHeight * 0.5 * (+attr.itemsperpage));
}
}
}
}
};
});
निर्देशन के साथ डेमो
Another Solution: If you using UI-grid in the project then same implementation is there in UI grid with infinite-scroll.
विभाजन की ऊंचाई के आधार पर यह डेटा को लोड करता है और स्क्रॉल पर नया डेटा एपेंड होगा और पिछला डेटा हटा दिया जाएगा।
HTML कोड:
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<link rel="stylesheet" href="https://cdn.rawgit.com/angular-ui/bower-ui-grid/master/ui-grid.min.css" type="text/css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.20/angular.js" data-semver="1.3.20"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-ui-grid/4.0.6/ui-grid.js"></script>
<script src="app.js"></script>
</head>
<body ng-controller="ListController">
<div class="input-group" style="margin-bottom: 15px">
<div class="input-group-btn">
<button class='btn btn-primary' ng-click="resetList()">RESET</button>
</div>
<input class="form-control" ng-model="search" ng-change="abc()">
</div>
<div data-ui-grid="gridOptions" class="grid" ui-grid-selection data-ui-grid-infinite-scroll style="height :400px"></div>
<button ng-click="getProductList()">Submit</button>
</body>
</html>
कोणीय कोड:
var app = angular.module('plunker', ['ui.grid', 'ui.grid.infiniteScroll', 'ui.grid.selection']);
var x;
angular.module('plunker').controller('ListController', ListController);
ListController.$inject = ['$scope', '$timeout', '$q', '$templateCache'];
function ListController($scope, $timeout, $q, $templateCache) {
$scope.itemsPerPage = 200;
$scope.lastPage = 0;
$scope.maxPage = 5;
$scope.data = [];
var request = {
"startAt": "1",
"noOfRecords": $scope.itemsPerPage
};
$templateCache.put('ui-grid/selectionRowHeaderButtons',
"<div class=\"ui-grid-selection-row-header-buttons \" ng-class=\"{'ui-grid-row-selected': row.isSelected}\" ><input style=\"margin: 0; vertical-align: middle\" type=\"checkbox\" ng-model=\"row.isSelected\" ng-click=\"row.isSelected=!row.isSelected;selectButtonClick(row, $event)\"> </div>"
);
$templateCache.put('ui-grid/selectionSelectAllButtons',
"<div class=\"ui-grid-selection-row-header-buttons \" ng-class=\"{'ui-grid-all-selected': grid.selection.selectAll}\" ng-if=\"grid.options.enableSelectAll\"><input style=\"margin: 0; vertical-align: middle\" type=\"checkbox\" ng-model=\"grid.selection.selectAll\" ng-click=\"grid.selection.selectAll=!grid.selection.selectAll;headerButtonClick($event)\"></div>"
);
$scope.gridOptions = {
infiniteScrollDown: true,
enableSorting: false,
enableRowSelection: true,
enableSelectAll: true,
//enableFullRowSelection: true,
columnDefs: [{
field: 'sno',
name: 'sno'
}, {
field: 'id',
name: 'ID'
}, {
field: 'name',
name: 'My Name'
}],
data: 'data',
onRegisterApi: function(gridApi) {
gridApi.infiniteScroll.on.needLoadMoreData($scope, $scope.loadMoreData);
$scope.gridApi = gridApi;
}
};
$scope.gridOptions.multiSelect = true;
$scope.makeid = function() {
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for (var i = 0; i < 5; i++)
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
}
$scope.abc = function() {
var a = $scope.search;
x = $scope.searchData;
$scope.data = x.filter(function(arr, y) {
return arr.name.indexOf(a) > -1
})
console.log($scope.data);
if ($scope.gridApi.grid.selection.selectAll)
$timeout(function() {
$scope.gridApi.selection.selectAllRows();
}, 100);
}
$scope.loadMoreData = function() {
var promise = $q.defer();
if ($scope.lastPage < $scope.maxPage) {
$timeout(function() {
var arrayObj = [];
for (var i = 0; i < $scope.itemsPerPage; i++) {
arrayObj.push({
sno: i + 1,
id: Math.random() * 100,
name: $scope.makeid()
});
}
if (!$scope.search) {
$scope.lastPage++;
$scope.data = $scope.data.concat(arrayObj);
$scope.gridApi.infiniteScroll.dataLoaded();
console.log($scope.data);
$scope.searchData = $scope.data;
// $scope.data = $scope.searchData;
promise.resolve();
if ($scope.gridApi.grid.selection.selectAll)
$timeout(function() {
$scope.gridApi.selection.selectAllRows();
}, 100);
}
}, Math.random() * 1000);
} else {
$scope.gridApi.infiniteScroll.dataLoaded();
promise.resolve();
}
return promise.promise;
};
$scope.loadMoreData();
$scope.getProductList = function() {
if ($scope.gridApi.selection.getSelectedRows().length > 0) {
$scope.gridOptions.data = $scope.resultSimulatedData;
$scope.mySelectedRows = $scope.gridApi.selection.getSelectedRows(); //<--Property undefined error here
console.log($scope.mySelectedRows);
//alert('Selected Row: ' + $scope.mySelectedRows[0].id + ', ' + $scope.mySelectedRows[0].name + '.');
} else {
alert('Select a row first');
}
}
$scope.getSelectedRows = function() {
$scope.mySelectedRows = $scope.gridApi.selection.getSelectedRows();
}
$scope.headerButtonClick = function() {
$scope.selectAll = $scope.grid.selection.selectAll;
}
}
अनन्त-स्क्रॉल डेमो के साथ UI ग्रिड के साथ डेमो
limitToकेवल 20 आइटम प्रदर्शित करने के लिए उपयोग कर सकते हैं :<p ng-repeat="data in dataset | limitTo:20">{{data}}</p>यह केवल 20 आइटम दिखाता है। तब आप पृष्ठों का उपयोग कर सकते हैं और अगले 10 आइटम या ऐसा कुछ दिखा सकते हैं। :)