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问题:

When I have the srcset property on my <img /> tag, why doesn't it show up in the browser? It appears as through React.js is stripping it out.

<img src="/images/logo.png" srcset="/images/logo-1.5x.png 1.5x, /images/logo-2x.png 2x" />

回答1:

The solution is to use srcSet instead of srcset.

<img src="/images/logo.png" srcSet="/images/logo-1.5x.png 1.5x, /images/logo-2x.png 2x" />

Reference: https://facebook.github.io/react/docs/tags-and-attributes.html under HTML Attributes

回答2:

Another ugly solution using template literals:

<img
  alt=''
  src={require('../../assets/images/logo/logo.png')}
  srcSet={`
    ${require('../../assets/images/logo/logo@2x.png')} 2x, 
    ${require('../../assets/images/logo/logo@3x.png')} 3x
  `}
/>

回答3:

Tried to use srcSet with a string didn't work for me probably because how Webpack works so in the end, imported them and include them with the template string as in the next example:

import nat1 from "./img/nat-1.jpg";
import nat1Large from "./img/nat-1-large.jpg";
import nat2 from "./img/nat-2.jpg";
import nat2Large from "./img/nat-2-large.jpg";
import nat3 from "./img/nat-3.jpg";
import nat3Large from "./img/nat-3-large.jpg";


  <div className="composition">
                <img
                  srcSet={`${nat1} 300w, ${nat1Large} 1000w`}
                  sizes="(max-width: 56.25em) 20vw, (max-width: 37.5em) 30vw, 300px"
                  alt="Photo 1"
                  className="composition__photo composition__photo--p1"
                  src={nat1Large}
                />
                <img
                  srcSet={`${nat2} 300w, ${nat2Large} 1000w`}
                  sizes="(max-width: 56.25em) 20vw, (max-width: 37.5em) 30vw, 300px"
                  alt="Photo 2"
                  className="composition__photo composition__photo--p2"
                  src={nat2Large}
                />
                <img
                  srcSet={`${nat3} 300w, ${nat3Large} 1000w`}
                  sizes="(max-width: 56.25em) 20vw, (max-width: 37.5em) 30vw, 300px"
                  alt="Photo 3"
                  className="composition__photo composition__photo--p3"
                  src={nat3Large}
                />
  </div>