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Support replacing node when filter #395

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Support replacing node when filter #395

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12 changes: 11 additions & 1 deletion src/dom-to-image.js
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Original file line number Diff line number Diff line change
Expand Up @@ -175,7 +175,17 @@
}

function cloneNode(node, filter, root) {
if (!root && filter && !filter(node)) return Promise.resolve();
if (!root && filter) {
const filterRet = filter(node)
if (!filterRet) {
// false or undefined or null
return Promise.resolve();
}

// if filter returns boolean true, keep node unchanged
// else we use filter result as template node to clone
node = filterRet === true ? node : filterRet;
}

return Promise.resolve(node)
.then(makeNodeCopy)
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