Examples

Print the help message

jstr --help

Print file content (single line)

jstr package.json

Print file content (with spaces)

jstr -s 2 package.json # 2 spaces

Copy file content

jstr -c package.json

Omit output fields

jstr -o name,version package.json

Map output fields

jstr -m '{"name":"foo"}' package.json

Print value of key using the callback parser

jstr package.json 'x => x.name'

Multi-line parser callback

jstr package.json "
function capitalize({ name }) {
  const head = name.charAt(0)                  
  const tail = name.slice(1)
  return head.toUpperCase() + tail
}
"

Asynchronous parser callback

jstr package.json "async x => x.name"

Using ts-belt

jstr package.json "D.get('name')"

Reading from a piped command

echo '{"name":"foo"}' | jstr -i 'x => x.name'

Generating a CSV file

jstr users.json "flow(A.map(D.get('friends')), A.flat)" --csv > users.csv

Creating a text file using data from the JSON input

echo '{"name":"foo"}' | jstr -i "D.get('name')" > name.txt