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Move fragment type check to normalizer (#2462)

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Should result in more informative stack traces.

Fixes #2461
This commit is contained in:
Isiah Meadows 2019-07-07 17:16:56 -04:00 • committed by GitHub
parent b2f82e3abc
commit db277217f8
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 53 additions and 27 deletions
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33
render/render.js
View file

@ -44,24 +44,8 @@ module.exports = function($window) {
return null
}
}
function validateKeys(vnodes, isKeyed) {
// Note: this is a *very* perf-sensitive check.
// Fun fact: merging the loop like this is somehow faster than splitting
// it, noticeably so.
for (var i = 1; i < vnodes.length; i++) {
if ((vnodes[i] != null && vnodes[i].key != null) !== isKeyed) {
throw new TypeError("Vnodes must either always have keys or never have keys!")
}
}
}
//create
function createNodesChecked(parent, vnodes, hooks, nextSibling, ns) {
if (vnodes.length) {
validateKeys(vnodes, vnodes[0] != null && vnodes[0].key != null)
createNodesUnchecked(parent, vnodes, 0, vnodes.length, hooks, nextSibling, ns)
}
}
function createNodesUnchecked(parent, vnodes, start, end, hooks, nextSibling, ns) {
function createNodes(parent, vnodes, start, end, hooks, nextSibling, ns) {
for (var i = start; i < end; i++) {
var vnode = vnodes[i]
if (vnode != null) {
@ -115,7 +99,7 @@ module.exports = function($window) {
var fragment = $doc.createDocumentFragment()
if (vnode.children != null) {
var children = vnode.children
createNodesChecked(fragment, children, hooks, null, ns)
createNodes(fragment, children, 0, children.length, hooks, null, ns)
}
vnode.dom = fragment.firstChild
vnode.domSize = fragment.childNodes.length
@ -146,7 +130,7 @@ module.exports = function($window) {
}
if (vnode.children != null) {
var children = vnode.children
createNodesChecked(element, children, hooks, null, ns)
createNodes(element, children, 0, children.length, hooks, null, ns)
if (vnode.tag === "select" && attrs != null) setLateSelectAttrs(vnode, attrs)
}
}
@ -289,19 +273,18 @@ module.exports = function($window) {
function updateNodes(parent, old, vnodes, hooks, nextSibling, ns) {
if (old === vnodes || old == null && vnodes == null) return
else if (old == null || old.length === 0) createNodesChecked(parent, vnodes, hooks, nextSibling, ns)
else if (old == null || old.length === 0) createNodes(parent, vnodes, 0, vnodes.length, hooks, nextSibling, ns)
else if (vnodes == null || vnodes.length === 0) removeNodes(old, 0, old.length)
else {
var isOldKeyed = old[0] != null && old[0].key != null
var isKeyed = vnodes[0] != null && vnodes[0].key != null
var start = 0, oldStart = 0
validateKeys(vnodes, isKeyed)
if (!isOldKeyed) while (oldStart < old.length && old[oldStart] == null) oldStart++
if (!isKeyed) while (start < vnodes.length && vnodes[start] == null) start++
if (isKeyed === null && isOldKeyed == null) return // both lists are full of nulls
if (isOldKeyed !== isKeyed) {
removeNodes(old, oldStart, old.length)
createNodesUnchecked(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns)
createNodes(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns)
} else if (!isKeyed) {
// Don't index past the end of either list (causes deopts).
var commonLength = old.length < vnodes.length ? old.length : vnodes.length
@ -318,7 +301,7 @@ module.exports = function($window) {
else updateNode(parent, o, v, hooks, getNextSibling(old, start + 1, nextSibling), ns)
}
if (old.length > commonLength) removeNodes(old, start, old.length)
if (vnodes.length > commonLength) createNodesUnchecked(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns)
if (vnodes.length > commonLength) createNodes(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns)
} else {
// keyed diff
var oldEnd = old.length - 1, end = vnodes.length - 1, map, o, v, oe, ve, topSibling
@ -366,7 +349,7 @@ module.exports = function($window) {
ve = vnodes[end]
}
if (start > end) removeNodes(old, oldStart, oldEnd + 1)
else if (oldStart > oldEnd) createNodesUnchecked(parent, vnodes, start, end + 1, hooks, nextSibling, ns)
else if (oldStart > oldEnd) createNodes(parent, vnodes, start, end + 1, hooks, nextSibling, ns)
else {
// inspired by ivi https://github.com/ivijs/ivi/ by Boris Kaul
var originalNextSibling = nextSibling, vnodesLength = end - start + 1, oldIndices = new Array(vnodesLength), li=0, i=0, pos = 2147483647, matched = 0, map, lisIndices
@ -387,7 +370,7 @@ module.exports = function($window) {
}
nextSibling = originalNextSibling
if (matched !== oldEnd - oldStart + 1) removeNodes(old, oldStart, oldEnd + 1)
if (matched === 0) createNodesUnchecked(parent, vnodes, start, end + 1, hooks, nextSibling, ns)
if (matched === 0) createNodes(parent, vnodes, start, end + 1, hooks, nextSibling, ns)
else {
if (pos === -1) {
// the indices of the indices of the items that are part of the

32
render/tests/test-normalizeChildren.js
View file

@ -21,4 +21,36 @@ o.spec("normalizeChildren", function() {
o(children[0]).equals(null)
})
o("allows all keys", function() {
var children = Vnode.normalizeChildren([
{key: 1},
{key: 2},
])
o(children).deepEquals([{key: 1}, {key: 2}])
})
o("allows no keys", function() {
var children = Vnode.normalizeChildren([
{data: 1},
{data: 2},
])
o(children).deepEquals([{data: 1}, {data: 2}])
})
o("disallows mixed keys, starting with key", function() {
o(function() {
Vnode.normalizeChildren([
{key: 1},
{data: 2},
])
}).throws(TypeError)
})
o("disallows mixed keys, starting with no key", function() {
o(function() {
Vnode.normalizeChildren([
{data: 1},
{key: 2},
])
}).throws(TypeError)
})
})

15
render/vnode.js
View file

@ -11,8 +11,19 @@ Vnode.normalize = function(node) {
}
Vnode.normalizeChildren = function(input) {
var children = []
for (var i = 0; i < input.length; i++) {
children[i] = Vnode.normalize(input[i])
if (input.length) {
var isKeyed = input[0] != null && input[0].key != null
// Note: this is a *very* perf-sensitive check.
// Fun fact: merging the loop like this is somehow faster than splitting
// it, noticeably so.
for (var i = 1; i < input.length; i++) {
if ((input[i] != null && input[i].key != null) !== isKeyed) {
throw new TypeError("Vnodes must either always have keys or never have keys!")
}
}
for (var i = 0; i < input.length; i++) {
children[i] = Vnode.normalize(input[i])
}
}
return children
}