Invert scale function

Question

This is interesting to me. Look at the following D3 code:

var scale = d3.scale.linear()
    .domain([100, 500])
    .range([10, 350]);

scale(100);  //Returns 10         


        

Answer 1

Yes, there is, and it's aptly named invert.

console.log(scale.invert(10));   //Returns 100
console.log(scale.invert(180));  //Returns 300
console.log(scale.invert(350));  //Returns 500