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POhow to use callback on javascript class function
 

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  1. POhow to use callback on javascript class function
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    <p>how to sue java script callback on javascript class function. i have to call SalesExceptionNMGList.getParam() after TerritoryList.getParam(); completes using callback only. please suggest to solve the problem.</p> <pre><code>$(document).ready (function() { TerritoryList.getParam();//takes 1 minutes to complete SalesExceptionNMGList.getParam();//call when TerritoryList.getParam() completes and get ajax response. using callback }); var TerritoryList={ act:null, division:null, region:null, cluster:null, getParam:function(){ this.act='getTerritory'; this.division = $("#division").val(); this.region = $("#region").val(); this.cluster = $("#cluster").val(); var TA = []; TA.push("act="); TA.push(this.act); TA.push("&amp;division="); TA.push(this.division); TA.push("&amp;region="); TA.push(this.region); TA.push("&amp;cluster="); TA.push(this.cluster); resetHierarchy("#territory,#wssTerritory,#freeWssTerritory,#territorycount,#wsscount"); if(this.cluster != "-1"){ this.callToServer(TA.join("")); } }, callToServer:function(arg){ var a="FillHeirarchy.do?"+arg; AJAX.setParams("POST",a,"text"); $("#loader").show(); AJAX.mXHTTPRequest(AJAX,this.handleServerResponse,true); return false }, handleServerResponse:function(response){ if (typeof callback === "function") { callback(response); } var resultobject=eval("("+response+")"); var res=resultobject.list; var h = "#territory"; var TA = []; TA.push("&lt;option value='-1' selected='true'&gt;Select Territory&lt;/option&gt;"); TA.push("&lt;option value='0' &gt; All &lt;/option&gt;"); if(res.length&gt;0) { if(res.length == 1) { var divisionVal=res[0]; var divisionArr=divisionVal.split("$"); TA.push("&lt;option value='"+divisionArr[0]+"' title='"+divisionArr[1].capitalize()+"'&gt;"+divisionArr[1].toUpperCase()+"&lt;/option&gt;"); } else { for (var i=0; i&lt;res.length; i++) { divisionVal=res[i]; divisionArr=divisionVal.split("$"); TA.push("&lt;option value='"+divisionArr[0]+"' title='"+divisionArr[1].capitalize()+"'&gt;"+divisionArr[1].toUpperCase()+"&lt;/option&gt;"); } } $(h).html(TA.join("")); // WssTerritoryList.getParam(); delete (TA); } $("#loader").hide(); $("#territorycount").html(res.length); selectedAll1('territory'); } }; var SalesExceptionNMGList={ act:null, division:null, region:null, cluster:null, territory:null, wssTerritory:null, searchType:null, exception:null, getParam:function(){ this.act='salesExceptionNMGList'; this.division = $("#division").val(); this.region = $("#region").val(); this.cluster = $("#cluster").val(); this.territory = $("#territory").val(); this.wssTerritory = $("#wssTerritory").val(); alert("wss= "+this.wssTerritory); alert("territory= "+this.territory); alert("cluster= "+this.cluster); if (this.wssTerritory!="-1") { this.searchType="wss"; } else if (this.territory!="-1") { this.searchType="territory"; } else if (this.cluster!="-1") { this.searchType="cluster"; } else{ this.searchType="cluster"; } if($('#chkSEOPG').is(':checked')){ this.exception="OPG"; }else if($('#chkSEPLB').is(':checked')){ this.exception="PLB"; }else{ this.exception="-1"; } var TA = []; TA.push("act="); TA.push(this.act); TA.push("&amp;division="); TA.push(this.division); TA.push("&amp;searchType="); TA.push(this.searchType); TA.push("&amp;salesException="); TA.push(this.exception); // resetHierarchy("#freeWssTerritory"); this.callToServer(TA.join("")); }, callToServer:function(arg){ var a="FillHeirarchy.do?"+arg; alert(a); AJAX.setParams("POST",a,"text"); $("#loader").show(); AJAX.mXHTTPRequest(AJAX,this.handleServerResponse,true); return false }, handleServerResponse:function(response){ alert(response); var resultobject=eval("("+response+")"); var res=resultobject.list; var h = "#product_nmg"; var TA = []; TA.push("&lt;option value='-1' selected='true'&gt;Select NMG&lt;/option&gt;"); TA.push("&lt;option value='0' &gt;All&lt;/option&gt;"); if(res.length == 1) { var divisionVal=res[0]; var divisionArr=divisionVal.split("$"); TA.push("&lt;option value='"+divisionArr[0]+"' title='"+divisionArr[1].capitalize()+"'&gt;"+divisionArr[1].capitalize()+"&lt;/option&gt;"); } else { for (var i=0; i&lt;res.length; i++) { divisionVal=res[i]; divisionArr=divisionVal.split("$"); TA.push("&lt;option value='"+divisionArr[0]+"' title='"+divisionArr[1].capitalize()+"'&gt;"+divisionArr[1].capitalize()+"&lt;/option&gt;"); } } $(h).html(TA.join("")); // ClusterList.getParam(); delete (TA); $("#loader").hide(); } }; </code></pre>
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    1. PTQuestion
    1. USGabriele Petrioli
    1. USneeraj bharti
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    1. COread this, it may help you http://recurial.com/programming/understanding-callback-functions-in-javascript/
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      1. POhow to use callback on javascript class function
      1. USMisters
    2. COSince you are using jQuery you could use its Ajax capabilities... it would simplify your code quite a lot ..
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      1. POhow to use callback on javascript class function
      1. USGabriele Petrioli
    3. COYou could modify getParam and hadleServerResponse methods. Take a look at my edited answer.
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      1. POhow to use callback on javascript class function
      1. USRuslanas Balčiūnas
 

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