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SOURCE
MAPS
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IT’S SHOWTIME
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It’s 2015
Tools Are Complicated
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Compilers
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Compilers
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Compilers
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Compilers
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Compilers
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Transpilers
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Transpilers
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Transpilers
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Preprocessors
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Preprocessors
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Preprocessors
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Preprocessors
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Postprocessors
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Postprocessors
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Postprocessors
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Postprocessors
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Postprocessors
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I’LL BE BACK
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Build Phase
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Build Phase
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Build Phase
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Build Phase
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Now you
have two
problems
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DEBUG
THIS
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Source Maps
To The
Rescue
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Content
Source
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CSS
&
JavaScript
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app.js app.min.js
Without Source Maps
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app.js app.min.js
app.min.js.map
With Source Maps
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Variable Length Quantity
http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/
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It all
Just Works
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Demo
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Multi-Level
Source Maps
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HASTA LA VISTA, BABY
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ES6
CoffeeScript
TypeScript
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ES6
CoffeeScript
TypeScript
Concat
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ES6
CoffeeScript
TypeScript
Concat Minify
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Demo
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ArnoldC
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IT'S SHOWTIME
TALK TO THE HAND "hello world"
YOU HAVE BEEN TERMINATED
Hello World
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GET TO THE CHOPPER a
HERE IS MY INVITATION 4
GET UP b
YOU'RE FIRED 2
ENOUGH TALK
a = (4 + b) * 2
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HEY CHRISTMAS TREE foo
YOU SET US UP @I LIED
HEY CHRISTMAS TREE bar
YOU SET US UP @NO PROBLEMO
foo = false
bar = true
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Two
Problems
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1.
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✓
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✓ ✗
✗
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✓
…
✗
✗
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2.
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2.
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So
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I wrote a compiler
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arnoldc.js
https://github.com/mattdsteele/arnoldc.js
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Compiles from ArnoldC to JavaScript
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Compiles from ArnoldC to JavaScript
(With Source Maps)
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DO IT
NOW
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11+
Source Maps
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1. Upgrade your tools
Tips
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2. Gulp > Grunt (for this)
Tips
gulp.task('javascript', function() {
gulp.src('src/**/*.js')
.pipe(sourcemaps.init())
.pipe(plugin1())
.pipe(plugin2())
.pipe(sourcemaps.write())
.pipe(gulp.dest('dist'));
});
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3. Inline your sourcesContent
Tips
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Tips
4. Source Map Visualization Tool
http://sokra.github.io/source-map-visualization/
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@mattdsteele
http://steele.blue