Limit the number of rows of autocomplete result , and match strings with starting letters only -


i'm using jquery autocomplete in project,

<div class="ui-widget">  <label for="tags">tags: </label>   <input id="tags"> </div>

json file

[          { "value": "saree",           "url": "/collection/saree" },          { "value": "lehangas",           "url": "/collection/lehangas" },          { "value": "dresses",           "url": "/collection/dresses" },          { "value": "tunics",           "url": "/collection/tunics" },          { "value": "kurtis",           "url": "/collection/kurtis" },          { "value": "blouses",           "url": "/collection/blouses" },          { "value": "duppattas",           "url": "/collection/duppattas" },           { "value": "shawls",           "url": "/collection/shawls" },           { "value": "plazos",           "url": "/collection/plazos" },           { "value": "skirts",           "url": "/collection/skirts" },           { "value": "patiala",           "url": "/collection/patiala" } ]

my js file:

$( function (){ $( "#tags" ).autocomplete({   source: "/static/admin/json/search.json",   select: function (event, ui) {         window.location = ui.item.url;     }  });  });

it displays results no matter character enter. want string matched according first letter , following letters. , also, want limit number of rows displayed 10.

so , please 1 me this. in advance.

html

<div class="ui-widget">   <label for="tags">tags: </label>   <input id="tags"> </div>

here have no idea whether getting json data in js file or not , in case json data available in js file , accessing json data in own way hope can manage things.

js file 

var data = [           { "value": "saree",            "url": "/collection/saree" },           { "value": "lehangas",            "url": "/collection/lehangas" },           { "value": "dresses",            "url": "/collection/dresses" },           { "value": "tunics",            "url": "/collection/tunics" },           { "value": "kurtis",            "url": "/collection/kurtis" },           { "value": "blouses",            "url": "/collection/blouses" },           { "value": "duppattas",            "url": "/collection/duppattas" },            { "value": "shawls",            "url": "/collection/shawls" },            { "value": "plazos",            "url": "/collection/plazos" },            { "value": "skirts",            "url": "/collection/skirts" },            { "value": "patiala",            "url": "/collection/patiala" }  ]      $( function (){  	$( "#tags" ).autocomplete({  		source: function(request, response){  			var lengthofsearch= request.term.length;  			var arr = jquery.map(data, function( element, index ) {  				if(element.value.substr(0,lengthofsearch).tolowercase() === request.term.tolowercase()){  					return  element;  				}  			});   			response(arr.slice(0,10));  		},  		select: function (event, ui) {  			window.location = ui.item.url;  		}  	});  });
<link href="https://code.jquery.com/ui/1.12.0/themes/smoothness/jquery-ui.css" rel="stylesheet"/>    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>    <script src="https://code.jquery.com/ui/1.12.0/jquery-ui.min.js"></script>  <div class="ui-widget">   <label for="tags">tags: </label>    <input id="tags">  </div>


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