Angular2 with Typescript is experiencing issues with the implementation of operations in JavaScript

I'm struggling to implement a D3 graph example in my Angular 2 TypeScript application. The issue arises with the lines marked with "----> Error".

I have no clue on how to tackle this problem. Can anyone offer some assistance?

d3.transition().duration(d3.event.altKey ? 7500 : 750).each(function () {
      path.exit().transition()
        .style("fill-opacity", function (d) {
          return d.depth === 1 + (root === p) ? 1 : 0; //----> Error: Operator '+' cannot be applied to types '1' and 'boolean'.
        })
        .attrTween("d", function (d) {
          return arcTween.call(this, exitArc(d));
        })
        .remove();

      path.enter().append("path")
        .style("fill-opacity", function (d) {
          return d.depth === 2 - (root === p) ? 1 : 0; //----> Error: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
        })
        .style("fill", function (d) {
          return d.fill;
        })
        .on("click", zoomIn)
        .on("mouseover", mouseOverArc)
        .on("mousemove", mouseMoveArc)
        .on("mouseout", mouseOutArc)
        .each(function (d) {
          this._current = enterArc(d);
        });


      path.transition()
        .style("fill-opacity", 1)
        .attrTween("d", function (d) {
          return arcTween.call(this, updateArc(d));
        });


    });

Answer №1

Encountered the following errors:

Error 1: Operator '+' cannot be applied to types '1' and 'boolean'.
return d.depth === 1 + (root === p) ? 1 : 0; //----> Fixed by adjusting parentheses:
return d.depth === 1 + (root === p ? 1 : 0);

Error 2: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
return d.depth === 2 - (root === p) ? 1 : 0; //----> Fixed by correcting parentheses:
return d.depth === 2 - (root === p ? 1 : 0);

Simplified solution for better readability:
return d.depth === (root === p ? 2 : 1);

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