JavaScript Function Use To Pass Variables to a URL.

Question

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I have this JavaScript code snippet. The webservice I am using is a GoogleAPI.

JavaScript

<script type="text/javascript" >     

	var googleURL = 'https://www.googleapis.com/analytics/v3/data/ga?ids=ga%3A76546294&dimensions='+'ga%3Asource&metrics=ga%3Ausers&sort=-ga%3Ausers&start-date='+strStartDate+'&end-date='+strEndDate+'&max-results=10';
	
	//The following JS function will pass the values from the form to the URL.
	function passVariable() {
        
	  var strStartDate = document.getElementById("from_date").value;
	  var strEndDate = document.getElementById("to_date").value;
        
	  alert(googleURL);
        
	}

As the comment mentions function passVariable() {} used to pass the strStartDate & strEndDate as the googleURLs' strStartDate & strEndDate.

I use the

JavaScript

alert(googleURL);

to display the URL and the output was "undefined". I cannot understand what should I do. Could someone please help me to solve this matter?

Thanks & regards,
Chiranthaka

Posted 15-Jul-14 18:33pm

Chiranthaka Sampath

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Peter Leow · Accepted Answer · 2014-07-15T19:02:00

Try this:

<script>
function passVariable() {
        
   var strStartDate = document.getElementById("from_date").value;
   var strEndDate = document.getElementById("to_date").value;

   var googleURL = 'https://www.googleapis.com/analytics/v3/data/ga?ids=ga%3A76546294&dimensions='+'ga%3Asource&metrics=ga%3Ausers&sort=-ga%3Ausers&start-date='+strStartDate+'&end-date='+strEndDate+'&max-results=10';

   alert(googleURL);
}
</script>

Read this to understand the Scope in JavaScript[^].
++++++++[Round 2]+++++++++
You have typed the wrrong names, should be strStartDate not startDate, Try this:

<script>
var strStartDate;
var strEndDate;
 
//This is the function that alert the GoogleURL.

function testVal(){

var googleURL = 'https://www.googleapis.com/analytics/v3/data/ga?ids=ga%3A76546294&dimensions='+'ga%3Asource&metrics=ga%3Ausers&sort=-ga%3Ausers&start-date='+strStartDate+'&end-date='+strEndDate+'&max-results=10';

alert(googleURL);
 
}
 
//The following JS function will pass the values from the form to the URL.
function passVariable() {

strStartDate = document.getElementById("from_date").value;
strEndDate = document.getElementById("to_date").value;
 
alert(strStartDate);
alert(strEndDate);
 
testVal();

}

</script>

ArunRajendra · Accepted Answer · 2014-07-15T18:38:00

Solution 1

XML

<script>
var strStartDate;
var strEndDate;

function SetVariable() {

   strStartDate = document.getElementById("from_date").value;
   strEndDate = document.getElementById("to_date").value;
}



SetVariable();



var googleURL = 'https://www.googleapis.com/analytics/v3/data/ga?ids=ga%3A76546294&dimensions='+'ga%3Asource&metrics=ga%3Ausers&sort=-ga%3Ausers&start-date='+strStartDate

+'&end-date='+strEndDate+'&max-results=10';

alert(  googleURL);



</script>

Posted 15-Jul-14 18:38pm

ArunRajendra

Updated 15-Jul-14 19:53pm

v3

Comments

Chiranthaka Sampath 16-Jul-14 0:54am

No pal it doesn't work that way. So what else I have to do?

ArunRajendra 16-Jul-14 1:37am

Try the modified solution.

Chiranthaka Sampath 16-Jul-14 3:07am

Ok now the problem is solved. But the dates are not passing to the URL as it should be. The strStartDate & strEndDate at the googleURL variable hasn't been replaced with the var strStartDate & var strEndDate values. So what do you think about that?

ArunRajendra 16-Jul-14 5:00am

Let assume this done on button click then add this lines into event.

SetVariable();

var googleURL = 'https://www.googleapis.com/analytics/v3/data/ga?ids=ga%3A76546294&dimensions='+'ga%3Asource&metrics=ga%3Ausers&sort=-ga%3Ausers&start-date='+strStartDate+'&end-date='+strEndDate+'&max-results=10';