pass and get data in createElement statement in javascript

How to pass and get data in createElement statement in javascript?

Here is the listed below code:

In "a1.html"
<script>
var myscript= document.createElement('script');
myscript.setAttribute('data-id1','fordata1');
myscript.setAttribute('data-id2','fordata2');
myscript.setAttribute('data-id3','fordata3');
myscript.setAttribute('data-id4','fordata4');
myscript.setAttribute('data-id5','fordata5');
myscript.setAttribute('src','get-id-in-js.js');
document.head.appendChild(myscript);
</script>

 

 In "get-id-in-js.js" file

var scripts=document.getElementsByTagName("script");
console.log(scripts[0].getAttribute("data-id1"));
console.log(scripts[0].getAttribute("data-id2"));
console.log(scripts[0].getAttribute("data-id3"));
console.log(scripts[0].getAttribute("data-id4"));
console.log(scripts[0].getAttribute("data-id5"));