如何在Chrome开发者工具的控制台中启用下划线? [英] How to enable to use underscore in console in Chrome developer tool?

问题描述

我正在使用Angular2和下划线，

I'm using Angular2 and underscore,

import * as _ from 'underscore';

，我也想在Chrome控制台窗口中使用下划线库. 甚至我确实中断了代码的中间部分，并尝试使用，但是却收到"未定义"错误.

and I want to use the underscore library in Chrome console window too. Even I do break on a middle of the code, and try to use , but I got ' is not defined' error.

是否可以在Chrome控制台窗口中使用下划线?怎么样?

Is it possible I can use the underscore in Chrome console window? how?

推荐答案

您只需在页面顶部添加 underscore.js 脚本即可完成此操作:

You can simply do it by adding underscore.js script onto the head of your page:

1)转到要调试页面的 Chrome控制台.

1) Go to Chrome Console of the page you wish to debug.

2)运行此脚本以导入 underscorejs ，以便控制台开始识别_命令:

2) Run this script to import underscorejs so that the console starts recognizing _ commands:

var s = document.createElement('script'); 
s.type = 'text/javascript';
s.src = 'https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js';
document.head.appendChild(s);

或者，您可以将这样的 import脚本代码保存在片段中，以备将来使用:

Alternatively, you can save such import script code inside a snippet for further usage:

转到源标签，选择代码段子选项卡，单击+添加新的代码段，然后添加以下代码并保存:

Go to source tab, select snippet sub-tab, click on + to add a new snippet, then add the following code and save:

(function () {
  if (typeof window._ === 'undefined') {    
    var s = document.createElement('script');
    s.type = 'text/javascript';
    s.src = 'https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js';
    document.head.appendChild(s);
  }
}());

这样，每当需要使用外部库调试页面时，只需运行对应的代码段即可添加页面！

This way, whenever you need to debug a page using an external library, you can simply add it by running its correspondent snippet!

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