Can I pass a string variable to jq rather than passing a file?

I want to convert JSON string into an array in bash.The JSON string is passed to the bash script as an argument (it doesn't exist in a file).

Is there a way of achieving it without using some temp files?

Similarly to this:

script.sh#! /bin/bashjson_data='{"key":"value"}'jq '.key' $json_datajq: error: Could not open file {key:value}: No such file or directory