What I like in the old codebase of web projects. it's chance to see history of real projects in old "dark" times of web. For example you take a look on the line code of project with 10 years history:

`scaleZoom = Math.log(scale) / Math.LN2;`

And you remember school course of algebra with properties of logarithms like `Math.log2`

in browsers was added a little bit later than `Math.log`

and developers with math in mind used to made this trick.

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