How to remove dead code from Javascript

Question

I am trying to remove unused functions from my project. Since it has thousands of lines, this takes forever.

Code coverage tools may suggest functions that are not used in a given test case, but it may be dangerous to rely only on this.

Is there another tool which can help with this?

I fear that tools are your best option - just use more than one tool and rely on their combined output. Save backup of everything and perform full test of everything before going live. — Shadow The GPT Wizard, Jul 18 '11 at 08:39

score 13 · Answer 1 · answered Jul 18 '11 at 08:43

13

You can try Google Closure compiler. It has different settings and you can also remove dead code automatically. You can try it here: http://closure-compiler.appspot.com/home

For more info read here: http://code.google.com/closure/compiler/docs/compilation_levels.html

answered Jul 18 '11 at 08:43

daveoncode

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The "advanced" optimization setting removes dead code automatically. – Anderson Green Mar 02 '13 at 22:59

score 1 · Answer 2 · edited May 23 '17 at 11:48

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Have a look at this question regarding Javascript static analysis tools.

edited May 23 '17 at 11:48

Community

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answered Jul 18 '11 at 08:46

Nico Huysamen

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How to remove dead code from Javascript

2 Answers2

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