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move up section on debugging with source maps

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Dan Wolff 2018-02-05 23:31:28 +01:00
parent 90508c672c
commit 600ed691ba
1 changed files with 8 additions and 8 deletions
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README.md
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@ -1103,6 +1103,14 @@ To enable fast minify mode with the API use:
UglifyJS.minify(code, { compress: false, mangle: true }); UglifyJS.minify(code, { compress: false, mangle: true });
``` ```
#### Source maps and debugging
Various `compress` transforms that simplify, rearrange, inline and remove code
are known to have an adverse effect on debugging with source maps. This is
expected as code is optimized and mappings are often simply not possible as
some code no longer exists. For highest fidelity in source map debugging
disable the Uglify `compress` option and just use `mangle`.
### Compiler assumptions ### Compiler assumptions
To allow for better optimizations, the compiler makes various assumptions. To allow for better optimizations, the compiler makes various assumptions.
@ -1117,11 +1125,3 @@ To allow for better optimizations, the compiler makes various assumptions.
- Object properties can be added, removed and modified (not prevented with - Object properties can be added, removed and modified (not prevented with
`Object.defineProperty()`, `Object.defineProperties()`, `Object.freeze()`, `Object.defineProperty()`, `Object.defineProperties()`, `Object.freeze()`,
`Object.preventExtensions()` or `Object.seal()`). `Object.preventExtensions()` or `Object.seal()`).
### Source maps and debugging
Various `compress` transforms that simplify, rearrange, inline and remove code
are known to have an adverse effect on debugging with source maps. This is
expected as code is optimized and mappings are often simply not possible as
some code no longer exists. For highest fidelity in source map debugging
disable the Uglify `compress` option and just use `mangle`.