CodeMirror作为Angular2组件_Angular_Typescript_Custom Component_Codemirror

CodeMirror作为Angular2组件

angular typescript

CodeMirror作为Angular2组件,angular,typescript,custom-component,codemirror,Angular,Typescript,Custom Component,Codemirror,我基于线程定义了一个codemirror组件，如下所示： import {Component, OnInit, ElementRef, OnChanges, AfterViewInit} from "angular2/core"; @Component({ selector: 'codemirror', templateUrl: '<textarea id="codeMirrorEditor" style="display: none"></textarea&

我基于线程定义了一个codemirror组件，如下所示：

import {Component, OnInit, ElementRef, OnChanges, AfterViewInit} from "angular2/core";

@Component({
    selector: 'codemirror',
    templateUrl: '<textarea id="codeMirrorEditor" style="display: none"></textarea>'
})
export class CodeMirrorComponent implements OnInit,OnChanges, AfterViewInit {

    height:number;

    editor:CodeMirror.Editor;

    editorNativeElement:any;

    constructor(elRef:ElementRef) {
        this.editorNativeElement = elRef.nativeElement;
    }

    ngOnInit() {
    }

    ngAfterViewInit() {
        this.editor = CodeMirror(this.editorNativeElement, {
            mode: "clike",
            lineNumbers: true
        });

        var code = "/**\r\n * This class subclasses DrawableRect and adds colors to the rectangle it draws\r\n **/\r\npublic class ColoredRect extends DrawableRect {\r\n  // These are new fields defined by this class.\r\n  // x1, y1, x2, and y2 are inherited from our super-superclass, Rect.\r\n  @AnnotationTest\r\n  protected Color border, fill;\r\n  private String name;\r\n\r\n  /**\r\n   * This constructor uses super() to invoke the superclass constructor, and\r\n   * also does some initialization of its own.\r\n   **/\r\n  public ColoredRect(int x1, int y1, int x2, int y2, Color border, Color fill){\r\n    super(x1, y1, x2, y2);\r\n    /* This\r\n    is a block comment */\r\n    this.border = border;\r\n    this.fill = fill;\r\n    this.name = \"This is a string\";\r\n  }\r\n\r\n  /**\r\n   * This method overrides the draw() method of our superclass so that it\r\n   * can make use of the colors that have been specified.\r\n   **/\r\n  public void draw(Graphics g) {\r\n    g.setColor(fill);\r\n    g.fillRect(x1, y1, x2, y2);\r\n    g.setColor(border);\r\n    g.drawRect(x1, y1, x2, y2);\r\n  }\r\n}"

        this.editor.setValue(code);
        this.editor.on('change', (editor: CodeMirror.Editor) => {
            var value = this.editor.getDoc().getValue();
            console.log("Value exposed:", value);
        });
    }

    ngOnChanges(changes:{}) {
        console.log("on changes");
    }

    updateHeight(height:number) {
        this.height = height;
    }
}

EXCEPTION: Error: More tasks executed then were scheduled.
EXCEPTION: Error: More tasks executed then were scheduled.
STACKTRACE:
Error: More tasks executed then were scheduled.
    at ZoneDelegate._updateTaskCount (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:398:24)
    at ZoneDelegate.invokeTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:369:27)
    at Zone.runTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:263:48)
    at ZoneTask.invoke (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:431:34)
  -------------   Elapsed: 104 ms; At: Wed Apr 06 2016 23:44:53 GMT-0500 (COT)   -------------  
    at Object.Zone.longStackTraceZoneSpec.onScheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:1354:23)
    at ZoneDelegate.scheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:342:50)
    at Zone.scheduleMacroTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:283:40)
    at http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:133:26
    at setTimeout (eval at createNamedFn (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:973:18), <anonymous>:3:37)
    at Delayed.set (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:8263:15)
    at TextareaInput.copyObj.slowPoll (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1390:21)
    at http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1392:43
  -------------   Elapsed: 101 ms; At: Wed Apr 06 2016 23:44:53 GMT-0500 (COT)   -------------  
    at Object.Zone.longStackTraceZoneSpec.onScheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:1354:23)
    at ZoneDelegate.scheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:342:50)
    at Zone.scheduleMacroTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:283:40)
    at http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:133:26
    at setTimeout (eval at createNamedFn (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:973:18), <anonymous>:3:37)
    at Delayed.set (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:8263:15)
    at TextareaInput.copyObj.slowPoll (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1390:21)
    at http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1392:43
Uncaught Error: More tasks executed then were scheduled.

从“angular2/core”导入{Component，OnInit，ElementRef，OnChanges，AfterViewInit}；
@组成部分({
选择器：“codemirror”，
templateUrl:“”
})
导出类CodeMirrorComponent实现OnInit、OnChanges和AfterViewInit{
高度：数字；
编辑器：codemirr.editor；
编辑元素：任何；
构造函数（elRef:ElementRef）{
this.editorNativeElement=elRef.nativeElement；
}
恩戈尼尼特（）{
}
ngAfterViewInit（）{
this.editor=code镜像（this.editorNativeElement{
模式：“陈词滥调”，
行号：对
});
var code=“/**\r\n*该类将DrawableRect子类化，并向其绘制的矩形添加颜色\r\n**/\r\n公共类ColoredRect扩展了DrawableRect{\r\n//这些是此类定义的新字段。\r\n//x1、y1、x2和y2是从我们的超超类Rect继承的。\r\n@AnnotationTest\r\n受保护的颜色边框，fill；\r\n私有字符串名；\r\n\r\n/**\r\n*此构造函数使用super（）调用超类构造函数，并且\r\n*也会自己进行一些初始化。\r\n**/\r\n public ColoredRect（int-x1，int-y1，int-x2，int-y2，Color-border，Color-fill）{\r\n super（x1，y1，x2，y2）；\r\n/*此\r\n是块注释*/\r\n This.border=border；\r\n This.fill=fill；\r\n This.name=\“这是一个字符串\“；\r\n}\r\n\r\n/***\r\n*此方法重写我们的超类的draw（）方法，以便它\r\n*可以使用已指定的颜色。\r\n**/\r\n public void draw（Graphics g）{\r\n g.setColor（fill）；\r\n g.fillRect（x1，y1，x2，y2）；\r\n g.setColor（border）；\r\n g.drawrectr（x1，y1，x2，y2）；\r\n}\r\n}”
this.editor.setValue（代码）；
this.editor.on（'change'，（编辑器：CodeMirror.editor）=>{
var value=this.editor.getDoc（）.getValue（）；
log（“值暴露：”，值）；
});
}
ngOnChanges（更改：{}）{
控制台。登录（“更改”）；
}
更新高度（高度：数字）{
高度=高度；
}
}

现在，可以用一段代码显示和初始化编辑器。但是，当我单击编辑器时，我得到了如下堆栈跟踪：

import {Component, OnInit, ElementRef, OnChanges, AfterViewInit} from "angular2/core";

@Component({
    selector: 'codemirror',
    templateUrl: '<textarea id="codeMirrorEditor" style="display: none"></textarea>'
})
export class CodeMirrorComponent implements OnInit,OnChanges, AfterViewInit {

    height:number;

    editor:CodeMirror.Editor;

    editorNativeElement:any;

    constructor(elRef:ElementRef) {
        this.editorNativeElement = elRef.nativeElement;
    }

    ngOnInit() {
    }

    ngAfterViewInit() {
        this.editor = CodeMirror(this.editorNativeElement, {
            mode: "clike",
            lineNumbers: true
        });

        var code = "/**\r\n * This class subclasses DrawableRect and adds colors to the rectangle it draws\r\n **/\r\npublic class ColoredRect extends DrawableRect {\r\n  // These are new fields defined by this class.\r\n  // x1, y1, x2, and y2 are inherited from our super-superclass, Rect.\r\n  @AnnotationTest\r\n  protected Color border, fill;\r\n  private String name;\r\n\r\n  /**\r\n   * This constructor uses super() to invoke the superclass constructor, and\r\n   * also does some initialization of its own.\r\n   **/\r\n  public ColoredRect(int x1, int y1, int x2, int y2, Color border, Color fill){\r\n    super(x1, y1, x2, y2);\r\n    /* This\r\n    is a block comment */\r\n    this.border = border;\r\n    this.fill = fill;\r\n    this.name = \"This is a string\";\r\n  }\r\n\r\n  /**\r\n   * This method overrides the draw() method of our superclass so that it\r\n   * can make use of the colors that have been specified.\r\n   **/\r\n  public void draw(Graphics g) {\r\n    g.setColor(fill);\r\n    g.fillRect(x1, y1, x2, y2);\r\n    g.setColor(border);\r\n    g.drawRect(x1, y1, x2, y2);\r\n  }\r\n}"

        this.editor.setValue(code);
        this.editor.on('change', (editor: CodeMirror.Editor) => {
            var value = this.editor.getDoc().getValue();
            console.log("Value exposed:", value);
        });
    }

    ngOnChanges(changes:{}) {
        console.log("on changes");
    }

    updateHeight(height:number) {
        this.height = height;
    }
}

EXCEPTION: Error: More tasks executed then were scheduled.
EXCEPTION: Error: More tasks executed then were scheduled.
STACKTRACE:
Error: More tasks executed then were scheduled.
    at ZoneDelegate._updateTaskCount (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:398:24)
    at ZoneDelegate.invokeTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:369:27)
    at Zone.runTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:263:48)
    at ZoneTask.invoke (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:431:34)
  -------------   Elapsed: 104 ms; At: Wed Apr 06 2016 23:44:53 GMT-0500 (COT)   -------------  
    at Object.Zone.longStackTraceZoneSpec.onScheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:1354:23)
    at ZoneDelegate.scheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:342:50)
    at Zone.scheduleMacroTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:283:40)
    at http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:133:26
    at setTimeout (eval at createNamedFn (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:973:18), <anonymous>:3:37)
    at Delayed.set (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:8263:15)
    at TextareaInput.copyObj.slowPoll (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1390:21)
    at http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1392:43
  -------------   Elapsed: 101 ms; At: Wed Apr 06 2016 23:44:53 GMT-0500 (COT)   -------------  
    at Object.Zone.longStackTraceZoneSpec.onScheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:1354:23)
    at ZoneDelegate.scheduleTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:342:50)
    at Zone.scheduleMacroTask (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:283:40)
    at http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:133:26
    at setTimeout (eval at createNamedFn (http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:973:18), <anonymous>:3:37)
    at Delayed.set (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:8263:15)
    at TextareaInput.copyObj.slowPoll (http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1390:21)
    at http://localhost:3000/node_modules/codemirror/lib/codemirror.js:1392:43
Uncaught Error: More tasks executed then were scheduled.

异常：错误：执行的任务比计划的多。
异常：错误：计划了更多执行的任务。
堆栈跟踪：
错误：计划了更多执行的任务。
在ZoneDelegate.\u updateTaskCount(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:398:24）
在ZoneDelegate.invokeTask(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:369:27）
在Zone.runTask(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:263:48）
在ZoneTask.invoke(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:431:34）
-------------时间：104毫秒；时间：2016年4月6日星期三23:44:53 GMT-0500（COT）---
位于Object.Zone.longStackTraceZoneSpec.onScheduleTask(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:1354:23）
在ZoneDelegate.scheduleTask(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:342:50）
在Zone.ScheduleMaroctask(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:283:40）
在http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:133:26
在setTimeout时（在createNamedFn时求值(http://localhost:3000/node_modules/angular2/bundles/angular2-polyfills.js:973:18），正如评论中指出的，这是Angular+Zone+polyfills上的一个bug。
在这里，我将介绍一种解决方法：
我们注释掉了这句话：
在
node_modules\angular2\bundles\angular2-polyfills.js文件，第398行
source+更多解决方法：
看起来像