This will be helpful in listing all double quoted strings from your js files. It will list strings which has more then 5 spaces

listAllStringFromJsfile.sh

#!/bin/bash

find src -name "*.js" | grep -v src/external | while read i
do

awk -F \" '
    {
        sep=""
        for (i=2; i<=NF; i+=2) {
            printf "%s\"%s\"", sep, $i
            sep="\n"
        }
        print ""
    }
' $i | sed '/^$/d' | while read w
    do
        spaces=`echo "$w" | sed 's/\s\+/\n/g'| wc -l`
        if [ "$spaces" -gt 5 ]
        then
            echo $w
        fi
    done

done


exit 0