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How devtools map minified JS code back to your TypeScript source code
- tantalor 11mo ago> Notice how the decoded values give relative positions, each value represents the difference from the previous position, not absolute coordinates. This is crucial: instead of encoding large column numbers like 27698 in minified files, source maps only store small deltas like +7 or +15, making the encoded strings much more compact. Wouldn't "offset" be a more apt term?
- manojvivek 11mo agoTo me, “offset” sounds more like the distance from the start, whereas here the values are relative to the previous segment. Not a native english speaker, so I could be wrong.
- tantalor 11mo agoOffset is difference from a starting point or a previous position
- jagged-chisel 11mo ago“Offset” is not enough on its own. Offset from what? Start of file? Absolute offset. Previous offset? Relative offset.
- willrshansen 11mo ago2nd order offset. The offset from the <offset from the start of the file>
- eat_veggies 11mo agoperhaps the delta between offsets
- jagged-chisel 11mo agoWe’re gonna need the delta of deltas
- recursive 11mo agoIt sounds equally apt to my ear. I've used both words for this concept in the past.
- deleted 11mo ago[deleted]
- hanikesn 11mo agoDelta Encoding is the common term
- tracker1 11mo agoAgreed... Delta Encoding, or even Delta Offset would work together.
- accrual 11mo agoIn this case I feel it's like six of one and a half-dozen of the other. Delta definition 4: (mathematics, physics, engineering) The symbol Δ; A change in a quantity, likely from "d" for "difference" Offset definition 7: The distance by which one thing is out of alignment with another. Got these from Wiktionary: * https://en.wiktionary.org/wiki/delta https://en.wiktionary.org/wiki/delta * https://en.wiktionary.org/wiki/offset https://en.wiktionary.org/wiki/offset
- paulddraper 11mo agoDelta and offset mean the same thing — the difference between two amounts. Delta is perhaps slightly more obscure outside of a math setting. Perhaps.
- saghm 11mo agoI feel like choosing the synonym that happens to be one letter shorter when the operation is literally intended to track things in a way that's more conscise is about as "apt" as it could be!
- zb3 11mo agoTangentially related, but last year I've made a tool to recover original sources from web apps which expose source maps (with the sourcesContent value present), including enumerating all lazily loaded chunks: https://github.com/zb3/getfrontend https://github.com/zb3/getfrontend
- kayson 11mo agoI love it when things are displayed so nicely on mobile. This could've been a pain to read and get through but it was actually quite pleasant.
- pseufaux 11mo agoRecent related post where Apple seemingly forgot to disable source maps for the App Store Apple's App Store Full Front End Source Code https://news.ycombinator.com/item?id=45804664 https://news.ycombinator.com/item?id=45804664 edit: formatting