Custom version of invariant, removes the invariant frame from the call stack

invariant.js

  function invariant(condition, message, a, b, c, d, e, f) {
    if (!condition) {
      var error;
      var args = [a, b, c, d, e, f];
      var argIndex = 0;
      error = new Error(
        message.replace(/%s/g, function () {
          return args[argIndex++];
        })
      );
      error.name = "Invariant Violation";

      // remove this frame from the stack
      var arr = error.stack.split("\n");
      error.stack = [arr[0]].concat(arr.slice(2)).join("\n");

      throw error;
    }

    return condition;
  }