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json - Can I pass a string variable to jq not the 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/bash
json_data='{"key":"value"}'
jq '.key' $json_data

jq: error: Could not open file {key:value}: No such file or directory
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I would suggest using a bash here string. e.g.

jq '.key' <<< "$json_data"

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