html - how to get custom attribute of option tag in dropdown?

Answer 1

//Pure Javascript solution, and elegant one check if you really want to leverage the power of javascript.

// Listening to a onchange event by ID attached with the select tag.
document.getElementById("name_your_id").onchange = function(event) {

//event.target.selectedOptions[0] have that option. as this is single selection by dropdown. this will always be 0th index :) 
let get_val = event.target.selectedOptions[0].getAttribute("isred");
console.log("Value from the Attribute: ", get_val)
}