Why doesn't this arrow function work in IE 11?

Question

Below piece of code does not work in IE 11, it throws a syntax error in the console

g.selectAll(\".mainBars\")
    .append(\"text\")
    .attr(\"x\", d =>         


        

Answer 1

IE doesn't support the arrow notation as of now but there is a handy and fast way for transpiling your ES6 codes to ES5.1 for working in IE. visit the Babel website then paste your codes in the left box and copy the right box code that is transpiled to the earlier version of JavaScript.

For example, your code is transpiled to:

"use strict";

g.selectAll(".mainBars").append("text").attr("x", function (d) {
   return d.part == "primary" ? -40 : 40;
}).attr("y", function (d) {
   return +6;
}).text(function (d) {
   return d.key;
}).attr("text-anchor", function (d) {
   return d.part == "primary" ? "end" : "start";
});