fix: context for loader without resource

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

context can be empty

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #409 (78f4cec) into master (2fca322) will increase coverage by 0.01%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #409      +/-   ##
==========================================
+ Coverage   92.12%   92.13%   +0.01%     
==========================================
  Files           7        7              
  Lines         584      585       +1     
  Branches      187      188       +1     
==========================================
+ Hits          538      539       +1     
  Misses         37       37              
  Partials        9        9              

Impacted Files	Coverage Δ
src/utils.js	90.04% <66.66%> (+0.02%)	⬆️

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