Call function to pass parameter in the DataTables reload

Question

I use the JQuery DataTables plugin and I initialize it with ajax parameter.

I'll need to calcolate new parameter when I reload data but not run if I pass parameter in the function. I call the ajax.reload from a "Reload" button. Why I can not use function with parameter?

// Run correctly
function loadData(){alert("called");}
tab=$("#tabID").DataTable({ajax:{url:"a.php",data:loadData}}); //  The "loadData" is called
...
$("#tabID").DataTable().ajax.reload(); //  The "loadData" is called again

// Problem
function loadData(A){alert("called with "+A);}
tab=$("#tabID").DataTable({ajax:{url:"a.php",data:loadData("text")}}); //  The "loadData" is called
...
$("#tabID").DataTable().ajax.reload(); // The "loadData" is NOT called... why?

Thank's

Gyrocode.com · Accepted Answer · 2016-05-04 10:42:46Z

1

Use the following code:

$("#tabID").DataTable({
   ajax: {
      url: "a.php",
      data: function(data, settings){
         return loadData("text");
      }
   }
});

edited May 4, 2016 at 10:42

answered May 3, 2016 at 17:14

Gyrocode.com

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1 Comment

Cuarcuiu Over a year ago

Thanks. I have modify the script with "return" before loadData("text");

zb' · Accepted Answer · 2016-05-03 16:12:35Z

// Problem
function loadData(A){alert("called with "+A);}
tab=$("#tabID").DataTable({ajax:{url:"a.php",data:loadData("text")}}); //  The "loadData" is called
...
$("#tabID").DataTable().ajax.reload(); // The "loadData" is NOT called... why?

It is just because in second case you pass to data: property result of loadData() not the function, you can bind your parameter like

tab=$("#tabID").DataTable({ajax:{url:"a.php",data:loadData.bind(null, "text")}});

read more about bind

if your browser not implemented bind, you can use handmade bind, or shim,

this code explains what bind make for you in this case

function bindArgs() { // this shim will not use 1st parameter, so should called as (bindArgs(callback, arguments);
    var args = Array.prototype.slice.call(arguments);
    var callback = args.shift();
    return function() { //return new function
           callback.apply(null, args); // run real callback
    }
}
function run() {console.log(arguments)}
setTimeout(bindArgs(run, 1,2,3), 1000)

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