JS Adventure - Speaker Deck

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JavaScript kyle simpson @getify http://getify.me

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You are Brendan Eich, employed at Netscape in May 1995. Your boss asks you to design a new language for the browser, but gives you only 10 days to complete it. Choose your next adventure! To agree and give it your best shot, turn to page 39. To laugh and walk away, turn to page 262. pg 16 pg 17

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You’ve learned the ins and outs of JavaScript, but lots of things still “bug” you. [] == ![] is just too unbearable to go on. Choose your next adventure! To give up on JS and move to go, turn to page NaN. To explore your own custom JS, turn to page 2 . 01e+2. pg 402 pg 403

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“less” standards, better tools

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vs.

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; vs.

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what if your team didn’t have to agree?

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github.com/getify/esre conﬁgurable 2-way code formatting

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not just styles, though...

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“12 Angry Men”

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TC39 :: ECMA-262 awb

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what if you could customize JS to your own liking?

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sweetjs.org JS macros

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beyond macros...

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{ block scoping }

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es6 ftw

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be careful

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ftw ... fml

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wait, what exactly am I suggesting?

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democracy? anarchy? oligarchy?!? YES heresy!

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FoilScript: github.com/getify/foilscript

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non-standard (or partial!) JavaScript github.com/getify/literalizer how can I parse ?

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never fear! github.com/getify/let-er --es3 ES6!

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github.com/getify/let-er ES6!

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google.github.io/traceur-compiler/demo/repl.html

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google.github.io/traceur-compiler/demo/repl.html

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unary + binary operator

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unary + binary operator

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unary + binary operator

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optional ternary-else

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optional ternary-else

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optional ternary-else

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promiscuous this binding hard this binding soft this binding

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soft binding

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soft binding

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soft binding

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soft binding

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conditional catch clauses

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conditional catch clauses

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conditional catch clauses

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? team collaboration

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inversible transforms

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inversible transforms

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stay tuned on that...

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• esprima/acorn (parser) • escodegen (code generator) • escope/eslevels (scope analyzer) • istanbul (code coverage) • estraverse (analyze AST) • eslint (pluggable code linting rules) • plato/jscomplexity.org (complexity)

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• auto-correct misspellings • safely re-arrange scope • consolidate declarations • automatically reduce complexity • refactor boolean traps • optimize performance • ...

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also see: https://speakerdeck.com/ariya/the-future-of-javascript-language-tooling also see: http://gregfranko.com/building-javascript-tools-talk/