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KnockoutJS to ES2015/ES6

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TODO: use the new Proxy for ko.observable
This commit is contained in:
djmaze 2020-10-04 21:58:13 +02:00
parent a0f8ac0dad
commit 72ed2b08b2
56 changed files with 941 additions and 1873 deletions
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26
vendors/knockout/src/subscribables/dependencyDetection.js vendored
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@ -1,19 +1,9 @@
ko.computedContext = ko.dependencyDetection = (function () {
ko.computedContext = ko.dependencyDetection = (() => {
var outerFrames = [],
currentFrame,
lastId = 0;
// Return a unique ID that can be assigned to an observable for dependency tracking.
// Theoretically, you could eventually overflow the number storage size, resulting
// in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53
// or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would
// take over 285 years to reach that number.
// Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html
function getId() {
return ++lastId;
}
function begin(options) {
outerFrames.push(currentFrame);
currentFrame = options;
@ -28,15 +18,15 @@ ko.computedContext = ko.dependencyDetection = (function () {
end: end,
registerDependency: function (subscribable) {
registerDependency: subscribable => {
if (currentFrame) {
if (!ko.isSubscribable(subscribable))
throw new Error("Only subscribable things can act as dependencies");
currentFrame.callback.call(currentFrame.callbackTarget, subscribable, subscribable._id || (subscribable._id = getId()));
currentFrame.callback.call(currentFrame.callbackTarget, subscribable, subscribable._id || (subscribable._id = ++lastId));
}
},
ignore: function (callback, callbackTarget, callbackArgs) {
ignore: (callback, callbackTarget, callbackArgs) => {
try {
begin();
return callback.apply(callbackTarget, callbackArgs || []);
@ -45,22 +35,22 @@ ko.computedContext = ko.dependencyDetection = (function () {
}
},
getDependenciesCount: function () {
getDependenciesCount: () => {
if (currentFrame)
return currentFrame.computed.getDependenciesCount();
},
getDependencies: function () {
getDependencies: () => {
if (currentFrame)
return currentFrame.computed.getDependencies();
},
isInitial: function() {
isInitial: () => {
if (currentFrame)
return currentFrame.isInitial;
},
computed: function() {
computed: () => {
if (currentFrame)
return currentFrame.computed;
}