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README.md

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README.md

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Steps

  1. dist/calculator.js Nim JS Output

  2. dist/calculator.prepack.js Partial Evaluation With Prepack

  3. dist/calculator.min.js Optimized with Closure Compiler

Conclusion

The result (dist/calculator.min.js) is like hand written JavaScript.

Before (Nim JS)

import dom

proc onLoad(event: Event) =
  let
    output = document.createTextNode("")
    input = document.createElement("input")

  input.addEventListener("input",
    proc(event: Event) = output.nodeValue = input.value
  )

  document.body.appendChild(input)
  document.body.appendChild(document.createElement("hr"))
  document.body.appendChild(output)

window.onload = onLoad

After (JavaScript)

this.onload = function() {
  var b = document.createTextNode(""),
    a = document.createElement("input");
  a.addEventListener(
    "input",
    function() {
      b.nodeValue = a.value;
    },
    !1
  );
  document.body.appendChild(a);
  document.body.appendChild(document.createElement("hr"));
  document.body.appendChild(b);
};