i need a help to convert this code from jquery to js 

$(document).ready(function(){
  $("#myInput").on("keyup", function() {
    var value = $(this).val().toLowerCase();
    $("#myDIV *").filter(function() {
      $(this).toggle($(this).text().toLowerCase().indexOf(value) > -1)
    });
  });
});

Hello,

this forum is mainly french-speaking, so I moved your topic to the English section.

Nevertheless, your post lacks some basic things. For starters, a "hello" is vividly recommanded. After all, people here are unpaid volontaries, and come and help on their spare time - so, a greeting is the least we can expect.

Another thing: did you try to "convert" (write a code which does the same as this one)? And what is it supposed to do? We need all the intel we can get to help you.