til

Today I Learned: collection of notes, tips and tricks and stuff I learn from day to day working with computers and technology as a developer

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Making sure you are using alt tags

Include this rule in your CSS while developing to make sure you remember those alt tags.

img:not([alt]){
    filter: grayscale(100%);
}

And as suggested you can extending with handling empty alt tags:

img[alt=""],
img:not([alt]){
    filter: grayscale(100%);
}

References