findIndex() method issue with internet explorer

So my question is how can i do differently to get my index for every browser ?

You have at least three options:

1. Shim Array#findIndex; MDN has a shim/polyfill you can use.

2. Use something else that IE11 has, such as Array#some (which even IE9 has):

   var index = -1;
   items.some(function(el, i) {
       if (el.name == paramProgramName) {
           index = i;
           return true;
       }
   });
   

3. Use something else that even IE8 has, such as for:

   var index = -1;
   for (var i = 0; i < items.length; ++i) {
       if (items[i].name == paramProgramName) {
           index = i;
           break;
       }
   }
   

you can use http://underscorejs.org/,

how to use:

var index = _.findIndex(objects, function(item){
return item.name == programName;
});