Détecter les images dont le chargement a échoué.
1st method: testing for .naturalWidth property of an image HTML node.
if (img.naturalWidth === 0)
throw `${src} -> naturalWidth === 0`2nd method: testing for .decode() execution.
try {
await img.decode()
} catch (exc) {
throw `${src} -> can't .decode()`
}Testing all images:
const imgs = document.querySelectorAll('img')
let src
for (const i of imgs) {
src = i.attributes.src.value
if (!src || !i.attributes.alt.value)
throw `missing required attribute src= or alt= for <img id="${i.id}" class="${i.classList}"`
if (i.naturalWidth === 0)
throw `${src} -> naturalWidth === 0`
try {
await i.decode()
} catch (exc) {
throw `${src} -> can't .decode()`
}
}
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