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问题:
I am trying to figure out why my angular 2 app is stuck on showing Loading... when running in IE 11.
Following someone's suggestion, I've tried this plunker, posted by someone on stack overflow, on both chrome and IE 11. Works fine on Chrome, but fails on IE 11. Same error, stuck on saying "Loading..."
The plunker is :
https://plnkr.co/edit/6zVFbrH5yohwc714gBbk?p=preview
<!DOCTYPE html>
<html>
<head>
<script>document.write('<base href="' + document.location + '" />');</script>
<title>Router Sample</title>
<link rel="stylesheet" href="style.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/es6-shim/0.34.2/es6-shim.min.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.1/angular2-polyfills.js"></script>
<script src="https://code.angularjs.org/tools/system.js"></script>
<script src="https://code.angularjs.org/tools/typescript.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.1/Rx.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.1/angular2.dev.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.1/http.dev.js"></script>
<script>
System.config({
transpiler: 'typescript',
typescriptOptions: { emitDecoratorMetadata: true },
packages: {'src': {defaultExtension: 'ts'}}
});
System.import('src/boot')
.then(null, console.error.bind(console));
</script>
</head>
<body>
<my-app>loading...</my-app>
</body>
</html>
Anybody got any idea as to why IE 11 fails to run the angular 2 app?
Thank you!
回答1:
The latest version of angular is only setup for evergreen browsers by default...
The current setup is for so-called "evergreen" browsers; the last versions of browsers that automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera), Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
This also includes firefox, although not mentioned.
See here for more information on browser support along with a list of suggested polyfills for specific browsers. https://angular.io/guide/browser-support#polyfill-libs
This means that you
manually have to enable the correct polyfills to get Angular working in IE11 and below.
To achieve this, go into polyfills.ts (in the src folder by default) and just uncomment the following imports:
/***************************************************************************************************
* BROWSER POLYFILLS
*/
/** IE9, IE10 and IE11 requires all of the following polyfills. **/
import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/set';
Note that the comment is literally in the file, so this is easy to find.
If you are still having issues, you can downgrade the target property to es5 in tsconfig.json as @MikeDub suggested. What this does is change the compilation output of any es6 definitions to es5 definitions. For example, fat arrow functions (()=>{}) will be compiled to anonymous functions (function(){}). You can find a list of es6 supported browsers here.
Notes
• I was asked in the comments by @jackOfAll whether IE11 polyfills are loaded even if the user is in an evergreen browser which doesn't need them. The answer is, yes they are! The inclusion of the IE11 polyfills will take your polyfill file from ~162KB to ~258KB as of Aug 8 '17. I have invested in trying to solve this however it does not seem possible at this time.
• If you are getting errors in IE10 and below, go into you package.json and downgrade webpack-dev-server to 2.7.1 specifically. Versions higher than this no longer support "older" IE versions.
回答2:
I ran into this issue today. I found an solution on GitHub that does not require going to a later version of the beta.
Add the following script to your html:
<script src="node_modules/angular2/es6/dev/src/testing/shims_for_IE.js"></script>
This resolved the problem for me. For more details, you can follow the github issue here: https://github.com/angular/angular/issues/7144
回答3:
I had the exact same issue and none of the solutions worked for me. Instead adding the following line in the (homepage).html under <head> fixed it.
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
回答4:
You'll need to adjust the polyfills.ts file for your target browsers
by uncommenting the appropriate sections.
/** IE9, IE10 and IE11 requires all of the following polyfills. **/
import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/weak-map';
import 'core-js/es6/set';
回答5:
EDIT 2018/05/15: This can be achieved with a meta tag; please add that tag to your index.html and disregard this post.
This is not a complete answer to the question (for the technical answer please refer to @Zze's answer above), but there's an important step that needs to be added:
COMPATIBILITY MODE
Even with the appropriate polyfills in place, there are still issues with running Angular 2+ apps using the polyfills on IE11. If you are running the site off an intranet host (ie. if you are testing it at http://localhost or another mapped local domain name), you must go into Compatibility View settings and uncheck "Display intranet sites in Compatibility View", since IE11's Compatibility View breaks a couple of the conventions included in the ES5 polyfills for Angular.
回答6:
As of Feb 2017
Using an Angular-Cli project, all lines in the polyfills.ts file were already uncommented so all polyfills were already being utilised.
I found this solution here to fix my issue.
To summarize the above link, IE doesn't support lambda arrow / fat arrow functions which are a feature of es6. (This is if polyfills.ts doesn't work for you).
Solution: you need to target es5 for it to run in any IE versions, support for this was only introduced in the new Edge Browser by Microsoft.
This is found under src/tsconfig.json:
"outDir": "../dist/out-tsc",
"sourceMap": true,
"target": "es5",
回答7:
As of September 2017 (node version=v6.11.3, npm version=3.10.10), this is what worked for me (thanks @Zze):
Edit polyfills.ts and uncomment the imports that are necessary for IE11.
More preciselly, edit polyfills.ts (located in the src folder by default) and just uncomment all lines required for IE11 (the comments inside the file explain exactly what imports are necessary to run on IE11).
A small warning: pay attention when uncommenting the lines for classlist.js and web-animations-js. These commented lines have a specific comment each: you must run the associated npm commands before uncommenting them or processing of polyfills.ts will break.
As a word of explanation, the polyfills are pieces of code that implement a feature on a web browser that do not support it.
This is why in the default polyfills.ts configuration only a minimal set of imports is active
(because it's aiming the so-called "evergreen" browsers; the last versions of browsers that automatically update themselves).
回答8:
For me with iexplorer 11 and Angular 2 I fixed all those above issues by doing 2 things:
in index.html
add:
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
in src\polyfills.ts
uncomment:
/** IE9, IE10 and IE11 requires all of the following polyfills. **/
import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/weak-map';
import 'core-js/es6/set';
回答9:
I was having the same issue, if you have enabled Display intranet sites in Compatibility View the polyfills.ts won't work, you still need to add the following line as has been told.
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
回答10:
What worked for me is I followed the following steps to improve my application perfomance in IE 11
1.) In Index.html file, add the following CDN's
<script src="https://npmcdn.com/angular2@2.0.0-
beta.17/es6/dev/src/testing/shims_for_IE.js"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/classlist/1.2.201711092/classList.min.js"></script>
2.) In polyfills.ts file and add the following import:
import 'core-js/client/shim';
回答11:
In polyfills.ts
import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es7/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/weak-map';
import 'core-js/es6/weak-set';
import 'core-js/es6/set';
/** IE10 and IE11 requires the following for NgClass support on SVG elements */
import 'classlist.js'; // Run `npm install --save classlist.js`.
/** Evergreen browsers require these. **/
import 'core-js/es6/reflect';
import 'core-js/es7/reflect';
/**
* Required to support Web Animations `@angular/animation`.
* Needed for: All but Chrome, Firefox and Opera. http://caniuse.com/#feat=web-animation
**/
import 'web-animations-js'; // Run `npm install --save web-animations-js`.
回答12:
If none of the other solutions work for you, it's worth investigating the source of the problem. It may be than an npm module directly inserts ES6 code, which cannot be transpiled.
In my case I had the
SCRIPT1002: Syntax error vendor.js (114536,27) at the following line:
const ucs2encode = array => String.fromCodePoint(...array);
I searched the node_modules folder and found from which file the line came. It turned out that the culprit was punycode.js which in it's 2.1.0 version uses ES6 directly.
After I downgraded it to 1.4.1, which uses ES5, the problem was solved.
回答13:
changing tsconfig.json
"target":"es5",
solved my problem
回答14:
If you have still problems that not all JavaScript functions are working add this line in your polyfills. It fixes the missing ‘values’ method:
import 'core-js/es7/object';
And this line fixes the missing ‘includes’ method:
import 'core-js/es7/array'
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