Define "legacy code". It isn't by definition bad; but of course it can be very bad indeed.
My first step would be to try and understand what it's doing so that, if changes are going to be required, I'm ready to make those changes. This might involve adding documentation where necessary.
If it's clearly bad code, or dependent on outdated technology (e.g. defunct libraries; difficult to manage build processes etc.); I would figure out a path to refactor it to remove that code and modernise where appropriate.
But sometimes "legacy code" is just fine. I know a site I worked on that is (at least the last time I checked) still running the script I wrote over ten years ago. I deliberately chose to use vanilla js with no dependencies (at the time most likely to be JQuery). I'm sure it could be modernized/improved; but apparently it still does the job well enough 😁
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Define "legacy code". It isn't by definition bad; but of course it can be very bad indeed.
My first step would be to try and understand what it's doing so that, if changes are going to be required, I'm ready to make those changes. This might involve adding documentation where necessary.
If it's clearly bad code, or dependent on outdated technology (e.g. defunct libraries; difficult to manage build processes etc.); I would figure out a path to refactor it to remove that code and modernise where appropriate.
But sometimes "legacy code" is just fine. I know a site I worked on that is (at least the last time I checked) still running the script I wrote over ten years ago. I deliberately chose to use vanilla js with no dependencies (at the time most likely to be JQuery). I'm sure it could be modernized/improved; but apparently it still does the job well enough 😁