To prevent minification of JS or CSS you can add Exclude Rules. For that in WordPress Admin go To SpeedyCache > Exclude Tab.
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In Exclude CSS Section click on Add New Rule button.
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A modal will open, there add the CSS file name which you want to prevent getting minified.
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Click on Save and that's it if any CSS file name contains that phrase you mentioned then it won't be minified.
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In Exclude JS Section click on Add New Rule button.
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A modal will open, there add the JS file name which you want to prevent getting minified.
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Click on Save and that's it if any JS file name contains that phrase you mentioned then it won't be minified.