https://github.com/lddubeau/systemjs_issue1
Illustrates a problem with SystemJS
https://github.com/lddubeau/systemjs_issue1
Last synced: 15 days ago
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Illustrates a problem with SystemJS
- Host: GitHub
- URL: https://github.com/lddubeau/systemjs_issue1
- Owner: lddubeau
- Created: 2016-07-29T22:52:46.000Z (almost 9 years ago)
- Default Branch: master
- Last Pushed: 2016-07-29T23:27:40.000Z (almost 9 years ago)
- Last Synced: 2025-02-17T15:51:56.588Z (3 months ago)
- Language: JavaScript
- Size: 1.95 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
### Versions
At the time of submitting the issue:
systemjs: 0.19.35
systemjs-builder: 0.15.25
### Steps to reproduce the problem
1. Clone this repo: https://github.com/lddubeau/systemjs_issue1
2. ``npm install``.
3. ``npm run build`` will produce ``js/out.js``.
4. Open ``index.html`` in a server. (You cannot just load it from ``file://`` due to cross-origin restrictions.)
You may need to reload, or play with the time parameter of `setTimeout` to get an error, the problem is a race condition.
The `index.html` contains the following:
```
System.config({
bundles: {
"out.js": [ "lib/modB.js"],
}
});
window.require = SystemJS.amdRequire;
window.define = SystemJS.amdDefine;
require(["modA"]);
setTimeout(function () {
require(["modC", "lib/modB"]);
}, 10);
```
The `system-config.js` file contains:
```
System.config({
baseURL: "js",
packages: {
'': {
defaultExtension: "js"
}
}
});
```
### Expected behavior
Everything should load without error. Files should be loaded once and only once.
### Actual behavior
`modC.js` fails to load properly. Two HTTP requests are made for it, and its loading ends with an error.
Errors on the console:
```
Assertion failed: is loading Uncaught (in promise)
Error: (SystemJS) Unable to load dependency http://localhost:3000/js/modC.js.(…)
Uncaught (in promise) Error: (SystemJS) load.execute is not a function(…)
```
I've also seen an error triggered by `normalizedDeps` being `null` at [this line](https://github.com/systemjs/systemjs/blob/3d097d90485a3ceaf5751b5b2709ab7606502105/dist/system.src.js#L3086).
### Observations
I ran into this problem while trying to port a large application based on RequireJS to SystemJS. The code base has worked fine with RequireJS for years. It also works with SystemJS so long as I don't try to load a bundle that calls out to a module that lives outside the bundle.