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Tiny knockoutjs speedup

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djmaze 2021-04-23 18:16:36 +02:00
parent 8aa9b0b33f
commit c3c1fc2c0e
5 changed files with 165 additions and 208 deletions
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45
vendors/knockout/src/utils.domNodeDisposal.js vendored
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@ -1,24 +1,23 @@
ko.utils.domNodeDisposal = new (function () {
ko.utils.domNodeDisposal = (() => {
var domDataKey = ko.utils.domData.nextKey();
var cleanableNodeTypes = { 1: true, 8: true, 9: true }; // Element, Comment, Document
var cleanableNodeTypesWithDescendants = { 1: true, 9: true }; // Element, Document
var cleanableNodeTypes = { 1: 1, 8: 1, 9: 1 }; // Element, Comment, Document
var cleanableNodeTypesWithDescendants = { 1: 1, 9: 1 }; // Element, Document
function getDisposeCallbacksCollection(node, createIfNotFound) {
const getDisposeCallbacksCollection = (node, createIfNotFound) => {
var allDisposeCallbacks = ko.utils.domData.get(node, domDataKey);
if ((allDisposeCallbacks === undefined) && createIfNotFound) {
allDisposeCallbacks = [];
ko.utils.domData.set(node, domDataKey, allDisposeCallbacks);
}
return allDisposeCallbacks;
}
function destroyCallbacksCollection(node) {
ko.utils.domData.set(node, domDataKey, undefined);
}
},
function cleanSingleNode(node) {
destroyCallbacksCollection = node => ko.utils.domData.set(node, domDataKey, undefined),
cleanSingleNode = node => {
// Run all the dispose callbacks
var callbacks = getDisposeCallbacksCollection(node, false);
var callbacks = getDisposeCallbacksCollection(node);
if (callbacks) {
callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
for (var i = 0; i < callbacks.length; i++)
@ -30,12 +29,11 @@ ko.utils.domNodeDisposal = new (function () {
// Clear any immediate-child comment nodes, as these wouldn't have been found by
// node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
if (cleanableNodeTypesWithDescendants[node.nodeType]) {
cleanNodesInList(node.childNodes, true/*onlyComments*/);
}
}
cleanableNodeTypesWithDescendants[node.nodeType]
&& cleanNodesInList(node.childNodes, true/*onlyComments*/);
},
function cleanNodesInList(nodeList, onlyComments) {
cleanNodesInList = (nodeList, onlyComments) => {
var cleanedNodes = [], lastCleanedNode;
for (var i = 0; i < nodeList.length; i++) {
if (!onlyComments || nodeList[i].nodeType === 8) {
@ -45,21 +43,20 @@ ko.utils.domNodeDisposal = new (function () {
}
}
}
}
};
return {
addDisposeCallback : (node, callback) => {
if (typeof callback != "function")
throw new Error("Callback must be a function");
getDisposeCallbacksCollection(node, true).push(callback);
getDisposeCallbacksCollection(node, 1).push(callback);
},
removeDisposeCallback : (node, callback) => {
var callbacksCollection = getDisposeCallbacksCollection(node, false);
var callbacksCollection = getDisposeCallbacksCollection(node);
if (callbacksCollection) {
ko.utils.arrayRemoveItem(callbacksCollection, callback);
if (callbacksCollection.length == 0)
destroyCallbacksCollection(node);
callbacksCollection.length || destroyCallbacksCollection(node);
}
},
@ -70,9 +67,8 @@ ko.utils.domNodeDisposal = new (function () {
cleanSingleNode(node);
// ... then its descendants, where applicable
if (cleanableNodeTypesWithDescendants[node.nodeType]) {
cleanNodesInList(node.getElementsByTagName("*"));
}
cleanableNodeTypesWithDescendants[node.nodeType]
&& cleanNodesInList(node.getElementsByTagName("*"));
}
});
@ -81,8 +77,7 @@ ko.utils.domNodeDisposal = new (function () {
removeNode : node => {
ko.cleanNode(node);
if (node.parentNode)
node.parentNode.removeChild(node);
node.parentNode && node.parentNode.removeChild(node);
}
};
})();