Using sed to remove all console.log from javascript file

Question

I'm trying to remove all my console.log, console.dir etc. from my JS file before minifying it with YUI (on osx).

The regex I got for the console statements looks like this:

console.(log|debug|info|warn|error|assert|dir|dirxml|trace|group|groupEnd|time|timeEnd|profile|profileEnd|count)\((.*)\);?

and it works if I test it with the RegExr. But it won't work with sed.

What do I have to change to get this working?

sed 's/___???___//g' <$RESULT >$RESULT_STRIPPED

update

After getting the first answer I tried

sed 's/console.log(.*)\;//g' <test.js >result.js

and this works, but when I add an OR

sed 's/console.\(log\|dir\)(.*)\;//g' <test.js >result.js

it doesn't replace the "logs":

terminal screenshot

score 12 · Accepted Answer · answered Jul 06 '11 at 15:16

12

Your original expression looks fine. You just need to pass the -E flag to sed, for extended regular expressions:

sed -E 's/console.(log|debug|info|...|count)\((.*)\);?//g'

The difference between these types of regular expressions is explained in man re_format. To be honest I have never read that page, but instead simply tack on an -E when things don't work as expected. =)

answered Jul 06 '11 at 15:16

Martin

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Your my best friend now! ```console.(log|debug|info|count)$(.*)$;?``` in sublime safely cleaned 2k lines. no more ugly logs :-) – James Harrington Sep 26 '14 at 18:23

Zsolt Botykai · Answer 2 · 2011-07-06T12:33:33.627

2

You must escape ( (for grouping) and | (for oring) in sed's regex syntax. E.g.:

sed 's/console.\(log\|debug\|info\|warn\|error\|assert\|dir\|dirxml\|trace\|group\|groupEnd\|time\|timeEnd\|profile\|profileEnd\|count\)(.*);\?//g'

UPDATE example:

$ sed 's/console.\(log\|debug\|info\|warn\|error\|assert\|dir\|dirxml\|trace\|group\|groupEnd\|time\|timeEnd\|profile\|profileEnd\|count\)(.*);\?//g'
console.log # <- input line, not matches, no replacement printed on next line
console.log
console.log() # <- input line, matches, no printing

console.log(blabla); # <- input line, matches, no printing

console.log(blabla) # <- input line, matches, no printing

console.debug();  # <- input line, matches, no printing

console.debug(BAZINGA)  # <- input line, matches, no printing

DATA console.info(ditto); DATA2 # <- input line, matches, printing of expected data
DATA  DATA2

HTH

edited Jul 06 '11 at 12:33

answered Jul 06 '11 at 11:40

Zsolt Botykai

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What you had tried as a second solution is searching for `console.` then any of `log` OR `dir` then a pair of `()` with our without any character within (e.g. `()` and `(((((()` are valid matches) then a `;`. – Zsolt Botykai Jul 06 '11 at 12:28
You should have had added that you are on OSX earlier... OSX sed != GNU sed. See the answer by Martin. – Zsolt Botykai Jul 06 '11 at 17:51
sorry, for that ... didn't know about the differences + added the osx part with the first update – Philipp Kyeck Jul 07 '11 at 08:53

score 1 · Answer 3 · answered Mar 05 '13 at 15:10

1

I try this:

sed -E 's/console.(log|debug|info)( ?| +)\([^;]*\);//g'

See the test: Regex Tester

answered Mar 05 '13 at 15:10

rodrigocorsi

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score 1 · Answer 4 · answered Jul 21 '14 at 10:09

1

Here's my implementation

for i in $(find ./dir -name "*.js")
do

sed -E 's/console\.(log|warn|error|assert..timeEnd)\((.*)\);?//g' $i > ${i}.copy && mv ${i}.copy $i

done

took the sed thing from github

answered Jul 21 '14 at 10:09

Ecko123

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score 1 · Answer 5 · answered Dec 13 '11 at 09:05

I also find the way to remove all the console.log , and i am trying to use python to do this, but i find the Regex is not work for. my writing like this:

var re=/^console.log(.*);?$/;

but it will match the following string:

'console.log(23);alert(234dsf);'

does it work? with the

"s/console.(log|debug|info|...|count)((.*));?//g"

score 0 · Answer 6 · answered Dec 24 '12 at 06:40

I was feeling lazy and hoping to find a script to copy & paste. Alas there wasn't one, so for the lazy like me, here is mine. It goes in a file named something like 'minify.sh' in the same directory as the files to minify. It will overwrite the original file and it needs to be executable.

#!/bin/bash

for f in *.js
do
    sed -Ei 's/console.(log|debug|info)\((.*)\);?//g' $f
    yui-compressor $f -o $f
done

score 0 · Answer 7 · answered Jan 16 '14 at 12:09

I'd just like to add here that I was running into issues with namespaced console.logs such as window.console.log. Also Tweenmax.js has some interesting uses of console.log in some parts such as

       window.console&&console.log(t)

So I used this

  sed -i.bak s/[^\&a-zA-Z0-9\.]console.log\(/\\/\\//g js/combined.js

The regex effectively says replace all console.logs that don't start with &, alphanumerics, and . with a '//' comment, which uglify later takes out.

score 0 · Answer 8 · answered Nov 18 '14 at 23:30

0

Rodrigocorsi's works with nested parentheses. I added a ? after the ; because yuicompressor was omitting some semicolons.

answered Nov 18 '14 at 23:30

mathewguest

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score 0 · Answer 9 · edited Jul 10 '18 at 15:33

0

It is probable that the reason this is not working is that you are not 'limiting' the regex to not include a closing parenthesises ()) in the method parameters.

Try this regular expression:

console\.(log|trace|error)\(([^)]+)\);

Remember to include the rest of your method names in the capture group.

edited Jul 10 '18 at 15:33

Michael Coxon

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answered Jul 10 '18 at 14:31

Trinadh Koya

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Using sed to remove all console.log from javascript file

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