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update iterator handling

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This commit is contained in:
Guy Bedford 2019-04-07 19:17:38 +02:00
parent 26673d8201
commit 532fdbdded
3 changed files with 22 additions and 30 deletions
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14
docs/api.md
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@ -88,18 +88,14 @@ System.set('http://site.com/normalized/module/name.js', {
If `module` is an existing Module Namespace, it will be used by reference.
#### System.entries() -> Array
#### System.entries() -> Iterator<[key, module]>
Type: `Function`
Allows you to retrieve all modules in the System registry. Each value will be an array with two values: a key and the module. Also available
at `System[Symbol.iterator]`.
Allows you to retrieve all modules in the System registry. Each value will be an array with two values: a key and the module.
```js
System.entries().forEach((key, value) => {
console.log(entry); // ['http://localhost/path-to-file.js', {exportName: 'exportedValue'}]
for (const [id, ns] of System.entries()) {
console.log(id); // 'http://localhost/path-to-file.js'
console.log(ns); // { exportName: 'value' }
});
for (let entry of System) {
console.log(entry); // ['http://localhost/path-to-file.js', {exportName: 'exportedValue'}]
}
```

34
src/features/registry.js
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@ -60,23 +60,19 @@ systemJSPrototype.delete = function (id) {
return delete this[REGISTRY][id];
};
systemJSPrototype.entries = function () {
const registry = this[REGISTRY];
return Object.keys(registry).map(function (key) {
return [key, registry[key].n];
});
}
const iterator = typeof Symbol !== 'undefined' && Symbol.iterator;
if (typeof Symbol !== 'undefined') {
systemJSPrototype[Symbol.iterator] = function () {
const registry = this[REGISTRY];
const keys = Object.keys(registry);
let index = 0;
return {
next() {
const key = keys[index++];
return { done: index > keys.length, value: key && [key, registry[key].n] };
}
};
}
}
systemJSPrototype.entries = function () {
const registry = this[REGISTRY], keys = Object.keys(registry);
let index = 0;
return {
next () {
const key = keys[index++];
return {
done: index > keys.length,
value: key && [key, registry[key].n]
};
},
[iterator]: function() { return this }
};
};

4
test/system-core.js
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@ -143,7 +143,7 @@ describe('Core API', function () {
await loader.import('h');
let foundH = false;
for (let entry of loader) {
for (let entry of loader.entries()) {
if (entry[0] === 'h' && entry[1].a === 'b') {
foundH = true;
}
@ -156,7 +156,7 @@ describe('Core API', function () {
loader.set('i', {a: 'b'});
await loader.import('i');
assert(loader.entries().some(entry => entry[0] === 'i' && entry[1].a === 'b'));
assert([...loader.entries()].some(entry => entry[0] === 'i' && entry[1].a === 'b'));
})
});
});