Traverse the values ​​in the EL expression List collection in javascript

A problem I encountered today is that I want to get the value in the list sent from the background in js. Originally, the page was displayed using ELexpression, and everything was fine. However, I needed to dynamically obtain the URL in the collection and then call qrcode in js to generate the QR code. When I tried to follow most of the ideas When getting the value, I encountered the following problem

for(var i=0;i<${myTickets.size()};i++)  
{  
  $(&#39;#qrcode&#39;+i).qrcode({text: ${myTickets[i].url}});  
}

Hahaha, I used the debugging tool to see that ${myTickets.size()} did get the length of the list, but $ {myTickets[i].url}} cannot get any value!

Then I tried to get the value as follows

[javascript] view plain copy
for(var i=0;i<${myTickets.size()};i++)  
{  
  alert(${myTickets[0].url})  
}

Hahaha, it hurts when I take it out. But the problem lies here: when using EL expression ${myTickets[i].url} in for loop, i cannot get the value, which means that EL expression cannot use JS The variable in the EL expression is a whole. Specifically, we can do the following, use foreach in JS to take out the push value into the array, and then loop to traverse the array, which can be a perfect solution:

[javascript] view plain copy
var array = new Array();  
<c:forEach items="${myTickets}" var="t">  
array.push(${t.ticketNo}); //js中可以使用此标签，将EL表达式中的值push到数组中  
</c:forEach>  
for(var i=0;i<array.length;i++)  
{  
  $(&#39;#qrcode&#39;+i).qrcode({text: ctx+"/wxpay/"+array[i]});  
}

above I compiled it for everyone. I hope it will be helpful to everyone in the future.

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