使用IE 11的Angular 4 app,"无法从释放的脚本执行代码"

Question

我有一个Angular应用程序,我认为是版本4. IE 11在此应用程序的登录序列中崩溃:"无法从释放的脚本执行代码".根据IE控制台,错误发生在第10939行的polyfills包中("var testString = delegate.toString()"),如下所示:

  var checkIEAndCrossContext = function (nativeDelegate, delegate, target, args) {
    if (!isDisableIECheck && ieOrEdge) {
        if (isEnableCrossContextCheck) {
            try {
                var testString = delegate.toString();
                if ((testString === FUNCTION_WRAPPER || testString == BROWSER_TOOLS)) {
                    nativeDelegate.apply(target, args);
                    return false;
                }
            }
            catch (error) {
                nativeDelegate.apply(target, args);
                return false;
            }
        }
        else {
            var testString = delegate.toString();   // <===== HERE!
            if ((testString === FUNCTION_WRAPPER || testString == BROWSER_TOOLS)) {
                nativeDelegate.apply(target, args);
                return false;
            }
        }
    }
    else if (isEnableCrossContextCheck) {
        try {
            delegate.toString();
        }
        catch (error) {
            nativeDelegate.apply(target, args);
            return false;
        }
    }
    return true;
};

我认为这是来自polyfills文件中的这一行:

 /* Zone JS is required by Angular itself.*/
 import 'zone.js/dist/zone';  // Included with Angular CLI.

这是关于zone.js的"package.json":

"zone.js": "^0.8.4"

polyfill.ts文件:

/**
 * This file includes polyfills needed by Angular and is loaded before the app.
 * You can add your own extra polyfills to this file.
 *
 * This file is divided into 2 sections:
 *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 *      file.
 *
 * 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.
 *
 * Learn more in https://angular.io/docs/ts/latest/guide/browser-support.html
 */

/***************************************************************************************************
 * 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/weak-map';
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`.

/** IE10 and IE11 requires the following to support `@angular/animation`. */
 import 'web-animations-js';  // Run `npm install --save web-animations-js`.


/** Evergreen browsers require these. **/
import 'core-js/es6/reflect';
import 'core-js/es7/reflect';


/** ALL Firefox browsers require the following to support `@angular/animation`. **/
 import 'web-animations-js';  // Run `npm install --save web-animations-js`.



/***************************************************************************************************
 * Zone JS is required by Angular itself.
 */
import 'zone.js/dist/zone';  // Included with Angular CLI.



/***************************************************************************************************
 * APPLICATION IMPORTS
 */

/**
 * Date, currency, decimal and percent pipes.
 * Needed for: All but Chrome, Firefox, Edge, IE11 and Safari 10
 */
// import 'intl';  // Run `npm install --save intl`.
/**
 * Need to import at least one locale-data with intl.
 */
// import 'intl/locale-data/jsonp/en';

import 'hammerjs/hammer';

在这种情况下,你会建议我做什么？

Answer 1

一种解决方案是将变量isEnableCrossContextCheck设置为true,以便IE运行包含try/catch块的代码,该块可以处理错误.

        if (isEnableCrossContextCheck) {
            try {
                var testString = delegate.toString();
                if ((testString === FUNCTION_WRAPPER || testString == BROWSER_TOOLS)) {
                    nativeDelegate.apply(target, args);
                    return false;
                }
            }
            catch (error) {
                nativeDelegate.apply(target, args);
                return false;
            }
        }
        else {
            var testString = delegate.toString(); 
            if ((testString === FUNCTION_WRAPPER || testString == BROWSER_TOOLS)) {
                nativeDelegate.apply(target, args);
                return false;
            }
        }

这篇文章说明了如何:

Angular 4为zone.js提供了一个全局常量