It&#39;s a known bug in the current Google Chrome and Chromium:  
https://bugs.chromium.org/p/chromium/issues/detail?id=807304

In the current version of their browser, the Chrome developers had restricted the X-XSS-Protection&#39;s report field URL to the same domain origin for some security reasons. So, when you embed a video with some embed code, as it downloads from another server where the header &quot;report=https://www.google.com/&quot; is set, and while your page is not hosted at the google.com domain - the error message occurs. 

Yet, all minor sites (including youtube.com) are sending report URL with different origin domains in it. Probably, they are not even aware of this recent change in Chrome. So either YouTube will change their headers or Chrome developers will revert this. There&#39;s nothing that we, as end users, can do. Just wait till they sort this out.

UPDATE:

The issue has been fixed in `Version 66.0.3359.117 (Official Build) (64-bit)`

The issue has been fixed in Google Chrome new update.
 
`Version 66.0.3359.117 (Official Build) (64-bit)`

Make sure you have updated Chrome to this version.

I would like to test that time is parsed correctly and I am only interested in checking some of the properties and not the entire object. In this case hour and minutes. 

I tried using `expect(object).toContain(value)` but as you can see in the snippet below it fails although the object contains the properties I am interested in and they have the correct value.  

    ● Calendar &gt; CalendarViewConfig › it should parse time

    expect(object).toContain(value)

    Expected object:
      {&quot;display&quot;: &quot;12:54&quot;, &quot;full&quot;: 774, &quot;hour&quot;: 12, &quot;hours&quot;: 12, &quot;minutes&quot;: 54, &quot;string&quot;: &quot;12:54&quot;}
    To contain value:
      {&quot;hours&quot;: 12, &quot;minutes&quot;: 54}

      67 |   it(&#39;it should parse time&#39;, () =&gt; {
      68 |     ...
    &gt; 69 |     expect(parseTime(&#39;12:54&#39;)).toContain({ hours: 12, minutes: 54})
      70 |   })

      at Object.&lt;anonymous&gt; (src/Components/Views/Calendar/CalendarViewConfig.test.js:69:32)


How can I test part of object using Jest?

I am using Webpack with firebase and firebase-admin.

To install firebase I ran:

    npm install --save firebase

I am importing firebase using:

    import * as firebase from &#39;firebase/app&#39;
    import &#39;firebase/auth&#39;

I also tried:

    import * as firebase from &#39;firebase&#39;

And I tried:

    const firebase = require(&#39;firebase&#39;)

As suggested in [web get started guide][1].

However, when I try to use `firebase.auth()` I get an error:

&gt; console.js:32 TypeError: firebase.auth is not a function

When I use the debugger to inspect `firebase` I see that it in fact does not have an `auth` function:

    &gt; firebase
     {__esModule: true, initializeApp: ƒ, app: ƒ, Promise: ƒ,&#160;…}

How can I get `auth()` included as a function using webpack?


  [1]: https://firebase.google.com/docs/web/setup
  [2]: https://i.stack.imgur.com/mc4qd.png

firebase.auth is not a function

I upgraded Google Chrome to `Version 64.0.3282.140 (Official Build) (64-bit)` on a Windows 10 machine. Once I did, I am getting this error on my site within the developer tools console. Not real sure where to start. I did see a similar issue last year that was an issue with youtube (also in the url), but I haven&#39;t seen any solutions. 


    
    Error parsing header X-XSS-Protection: 1; mode=block; 
    report=https://www.google.com/appserve/security-bugs/log/youtube: insecure 
    reporting URL for secure page at character position 22. The default 
    protections will be applied.
    16:07:31.905

I&#39;m also seeing the issue when I go directly to youtube via the embedded url so it&#39;s not just on my site. 

UPDATE 

I&#39;ve attached a photo of the headers in the response that indicate the google.com url that appears to be generating the issue. 

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/QsvVy.png

Error parsing header X-XSS-Protection - Google Chrome

I upgraded Google Chrome to <code>Version 64.0.3282.140 (Official Build) (64-bit)</code> on a Windows 10 machine. Once I did, I am getting this error on my site within the developer tools console. Not real sure where to start. I did see a similar issue last year that was an issue with youtube (also in the url), but I haven't seen any solutions.
<pre><code class="hljs language-arduino">Error parsing header X-XSS-Protection: 1; mode=block; 
report=https://www.google.com/appserve/security-bugs/log/youtube: insecure 
reporting URL for secure page at character position 22. The default 
protections will be applied.
16:07:31.905
</code></pre>
I'm also seeing the issue when I go directly to youtube via the embedded url so it's not just on my site.
UPDATE
I've attached a photo of the headers in the response that indicate the google.com url that appears to be generating the issue.
<a href="https://i.stack.imgur.com/QsvVy.png" target="_blank" rel="noopener noreferrer"><img src="https://i.stack.imgur.com/QsvVy.png" alt="enter image description here"></a>

When testing a module that has a dependency in a different file and assigning that module to be a `jest.mock`, TypeScript gives an error that the method `mockReturnThisOnce` (or any other `jest.mock` method) does not exist on the dependency, this is because it is previously typed. 

What is the proper way to get TypeScript to inherit the types from `jest.mock`?

Here is a quick example.

Dependency

    const myDep = (name: string) =&gt; name;
    export default myDep;

test.ts

    import * as dep from &#39;../depenendency&#39;;
    jest.mock(&#39;../dependency&#39;);

    it(&#39;should do what I need&#39;, () =&gt; {
      //this throws ts error
      // Property mockReturnValueOnce does not exist on type (name: string)....
      dep.default.mockReturnValueOnce(&#39;return&#39;)
    }

I feel like this is a very common use case and not sure how to properly type this.

Mock dependency in Jest with TypeScript

Looking for a way to add an &quot;Export to CSV&quot; button to a  react-table which is an npmjs package ([https://www.npmjs.com/package/react-table][1]).

I need to add a custom button for exporting the table data to an excel sheet in the csv or xls format?


  [1]: https://www.npmjs.com/package/react-table

Export to CSV button in react table

I&#39;m having issues disabling certain options within a large list within a React Select element. I have around 6,500 options that get loaded into the select. At first I was having issues with the search functionality lagging but then I started using react-select-fast-filter-options which took care of that problem. Now the issue is that I need to disable certain options depending on the propType &quot;picks&quot;. Here is the code:

    import React, {Component} from &#39;react&#39;
    import PropTypes from &#39;prop-types&#39;;
    import &#39;react-select/dist/react-select.css&#39;
    import &#39;react-virtualized/styles.css&#39;
    import &#39;react-virtualized-select/styles.css&#39;
    import Select from &#39;react-virtualized-select&#39;
    import createFilterOptions from &#39;react-select-fast-filter-options&#39;;
    
    let options = [];
    if(typeof stockSearchStocks !== &#39;undefined&#39;) {
        //loads in all available options from backend by laying down a static js var
        options = stockSearchStocks
    }
    const filterOptions =  createFilterOptions({options});
    
    class StockSearch extends Component {
        static propTypes = {
            exchanges: PropTypes.array.isRequired,
            onSelectChange: PropTypes.func.isRequired,
            searchDisabled: PropTypes.bool.isRequired,
            picks: PropTypes.array.isRequired,
            stock_edit_to_show: PropTypes.number
        }
    
        /**
         * Component Bridge Function
         * @param stock_id stocks id in the database
         */
        stockSearchChange = (stock_id) =&gt; {
            this.props.onSelectChange(stock_id);
        }
    
         //this is my current attempt to at least 
         //disable options on component mount but this doesn&#39;t seem to be working
        componentWillMount = () =&gt; {
            console.log(&#39;picks!: &#39; + JSON.stringify(this.props.picks));
            let pickIDs = this.props.picks.map((p) =&gt; p.stock_id);
            options = options.map((o) =&gt; {
                // console.log(pickIDs.indexOf(o.value));
                if(pickIDs.indexOf(o.value)) {
                    // console.log(&#39;here is the option: &#39; + JSON.stringify(o));
                    // console.log(&#39;here is the option: &#39; + o.disabled);
                    o.disabled = true;
                }
            })
    
        }
    
        /**
         * handles selected option from the stock select
         * @param selectedOption
         */
        handleSelect = (selectedOption) =&gt; {
            this.stockSearchChange(selectedOption.value);
        }
    
        render() {
            return (
                &lt;div className=&quot;stock-search-container&quot;&gt;
                    &lt;Select
                        name=&quot;stock-search&quot;
                        options={options}
                        placeholder=&quot;Type or select a stock here...&quot;
                        onChange={this.handleSelect}
                        disabled={this.props.searchDisabled}
                        value={this.props.stock_edit_to_show}
                        filterOptions={filterOptions}
                    /&gt;
                &lt;/div&gt;
            )
        }
    }
    
    export default StockSearch;

I have tried filtering through the picks props and changing that options variable to include `disabled:true` but this lags the application and I&#39;m not sure if that will work now that I&#39;m using react-select-fast-filter-options as it seems to be doing some sort of indexing. Is there a way to filter through the options var to find all instances of the picks prop and disable those options quickly?

React Select disable options

I&#39;d like to **change the implementation of a mocked dependency** on a per **single test basis** by **extending the default mock**&#39;s behaviour and **reverting it back** to the original implementation when the next test executes.

More briefly this is what I&#39;m trying to achieve:

 1. **mock** dependency
 2. **change/extend mock implementation** in a single test
 3. **revert back** to original mock when next test executes

I&#39;m currently using `Jest v21`.

Here is what a typical Jest test would look like:

**`__mocks__/myModule.js`**

    const myMockedModule = jest.genMockFromModule(&#39;../myModule&#39;);
    
    myMockedModule.a = jest.fn(() =&gt; true);
    myMockedModule.b = jest.fn(() =&gt; true);
    
    export default myMockedModule;


**`__tests__/myTest.js`**

    import myMockedModule from &#39;../myModule&#39;;
    
    // Mock myModule
    jest.mock(&#39;../myModule&#39;);
    
    beforeEach(() =&gt; {
      jest.clearAllMocks();
    });
    
    describe(&#39;MyTest&#39;, () =&gt; {
      it(&#39;should test with default mock&#39;, () =&gt; {
        myMockedModule.a(); // === true
        myMockedModule.b(); // === true
      });
    
      it(&#39;should override myMockedModule.b mock result (and leave the other methods untouched)&#39;, () =&gt; {
        // Extend change mock
        myMockedModule.a(); // === true
        myMockedModule.b(); // === &#39;overridden&#39;
        // Restore mock to original implementation with no side effects
      });
    
      it(&#39;should revert back to default myMockedModule mock&#39;, () =&gt; {
        myMockedModule.a(); // === true
        myMockedModule.b(); // === true
      });
    });

Here is what I&#39;ve tried so far:


----------


1 - [mockFn.mockImplementationOnce(fn)][1]
-----------------------------------------------

**pros**

 - Reverts back to original implementation after first call

**cons**

 - It breaks if the test calls `b` multiple times
 - It doesn&#39;t revert to original implementation until `b` is not called (leaking out in the next test)

**code:**

    it(&#39;should override myModule.b mock result (and leave the other methods untouched)&#39;, () =&gt; {
    
      myMockedModule.b.mockImplementationOnce(() =&gt; &#39;overridden&#39;);
    
      myModule.a(); // === true
      myModule.b(); // === &#39;overridden&#39;
    });


----------


2 - [jest.doMock(moduleName, factory, options)][2]
-----------------------------------------------

**pros**

 - Explicitly re-mocks on every test

**cons**

 - Cannot define default mock implementation for all tests
 - Cannot extend default implementation forcing to re-declare each mocked
   method
 
**code:**

    it(&#39;should override myModule.b mock result (and leave the other methods untouched)&#39;, () =&gt; {
    
      jest.doMock(&#39;../myModule&#39;, () =&gt; {
        return {
          a: jest.fn(() =&gt; true,
          b: jest.fn(() =&gt; &#39;overridden&#39;,
        }
      });
    
      myModule.a(); // === true
      myModule.b(); // === &#39;overridden&#39;
    });


----------

3 - Manual mocking with setter methods (as explained [here][3])
------------------------------------------------------------

**pros**

 - Full control over mocked results

**cons**

 - Lot of boilerplate code
 - Hard to maintain on long term

**code:**

**`__mocks__/myModule.js`**

    const myMockedModule = jest.genMockFromModule(&#39;../myModule&#39;);

    let a = true;
    let b = true;
    
    myMockedModule.a = jest.fn(() =&gt; a);
    myMockedModule.b = jest.fn(() =&gt; b);
    
    myMockedModule.__setA = (value) =&gt; { a = value };
    myMockedModule.__setB = (value) =&gt; { b = value };
    myMockedModule.__reset = () =&gt; {
      a = true;
      b = true;
    };
    export default myMockedModule;

**`__tests__/myTest.js`**

    it(&#39;should override myModule.b mock result (and leave the other methods untouched)&#39;, () =&gt; {
      myModule.__setB(&#39;overridden&#39;);
    
      myModule.a(); // === true
      myModule.b(); // === &#39;overridden&#39;
    
      myModule.__reset();
    });


----------

4 - [jest.spyOn(object, methodName)][4]
---------------------------------------

**cons**

 - I can&#39;t revert back `mockImplementation` to the original mocked return value, therefore affecting the next tests

**code:**

    beforeEach(() =&gt; {
      jest.clearAllMocks();
      jest.restoreAllMocks();
    });

    // Mock myModule
    jest.mock(&#39;../myModule&#39;);
    
    it(&#39;should override myModule.b mock result (and leave the other methods untouched)&#39;, () =&gt; {
    
      const spy = jest.spyOn(myMockedModule, &#39;b&#39;).mockImplementation(() =&gt; &#39;overridden&#39;);
    
      myMockedModule.a(); // === true
      myMockedModule.b(); // === &#39;overridden&#39;
    
      // How to get back to original mocked value?
    });

  [1]: https://facebook.github.io/jest/docs/en/mock-function-api.html#mockfnmockimplementationoncefn
  [2]: https://facebook.github.io/jest/docs/en/jest-object.html#jestdomockmodulename-factory-options
  [3]: https://facebook.github.io/jest/docs/en/manual-mocks.html#docsNav
  [4]: https://facebook.github.io/jest/docs/en/jest-object.html#jestspyonobject-methodname

How to change mock implementation on a per single test basis [Jestjs]

I am writing tests using Jest for components that use canvas elements. I keep getting an error when I run my tests that looks like this.

    Error: Not implemented: HTMLCanvasElement.prototype.getContext (without installing the canvas npm package)

From my understanding Jest uses jsdom for its testing and that jsdom is compatible with canvas if you install the canvas or canvas-prebuilt packages.

I have tried installing each of these packages and neither of them have resolved the error. The only thing that I think could be going wrong is that jsdom cannot find the canvas or canvas-prebuilt packages. Does anyone know a way to fix this error or test to see if jsdom is finding the other packages? Thanks a lot!

unit test raises error because of .getContext() is not implemented

What favicon dimensions, file formats and meta/link tags should be used as of 2022? This includes apple icon, windows, android and other devices people use today.

I use Opera and I can see it supports svg format. Is it the best solution to use svg nowadays? Is there any option &quot;one file fits all&quot;?

I&#39;ve been browsing many websites and checked different &quot;favicon generators&quot;. All of them are years old and work mostly with png files.

**For example:**
What code should be used for ico and svg? 

    &lt;link rel=&quot;icon&quot; href=&quot;favicon.ico&quot; type=&quot;image/ico&quot;&gt;
    &lt;link rel=&quot;icon&quot; href=&quot;favicon.svg&quot; type=&quot;image/svg+xml&quot;&gt;



or should dimensions be specified if ico contains more sizes? I didn&#39;t find one good answer.

    &lt;link rel=&quot;icon&quot; sizes=&quot;16x16 24x24 32x32 48x48 64x64&quot; href=&quot;favicon.ico&quot;&gt;


Please provide dimensions, file formats and meta/link tags of what favicons should be used.



Favicon Standard - 2022 - svg, ico, png and dimensions?

In my angular 4 app, I have a string like

    comment: string;
    comment = &quot;&lt;p&gt;&lt;em&gt;&lt;strong&gt;abc&lt;/strong&gt;&lt;/em&gt;&lt;/p&gt;&quot;;

When I serve this text in my html, like

    {{comment}}

Then it displays: 

    &lt;p&gt;&lt;em&gt;&lt;strong&gt;abc&lt;/strong&gt;&lt;/em&gt;&lt;/p&gt;

But I need to display the text &quot;abc&quot; in bold and italic form, like
***abc***

How can I do this?
 

How to render string with html tags in Angular 4+?

Angular 5, Typescript 2.7.1

I can&#39;t seem to get the checkbox to be checked when returning a boolean, I&#39;ve tried, `item.check` returns either true or false.

    &lt;tr class=&quot;even&quot; *ngFor=&quot;let item of rows&quot;&gt;
    &lt;input value=&quot;{{item.check}}&quot; type=&quot;checkbox&quot; checked=&quot;item.check&quot;&gt;

The checkbox is always checked when checked is written inside input. And it does not get unchecked when `checked=&quot;false&quot;`.

Is there a better way to do it with Angular features instead? like ngModel or ngIf???

Solution

    &lt;input type=&quot;checkbox&quot; [checked]=&quot;item.check == &#39;true&#39;&quot;&gt;



Angular 5, HTML, boolean on checkbox is checked

A grid is implemented using the CSS flexbox. [Example:](http://jsbin.com/jumosicasi/edit?html,css,js,output)

[![enter image description here][1]][1]

The number of rows in this example is 4 because I fixed the container width for demo purposes. But, in reality, it can change based on container&#39;s width (e.g. if the user resizes the window). Try to resize the Output window in [this example](http://jsbin.com/wogehuhiqa/1/edit?html,css,output) to get a feeling.

There is always one active item, marked with the black border.

Using JavaScript, I allow users to navigate to the previous/next item using the left/right arrow. In my implementation, I just decrease/increase the index of the active item by 1.

Now, I&#39;d like to allow users to navigate up/down as well. For that, I just need to decrease/increase the index of the active item by `&lt;amount of items in a row&gt;`. But, how do I calculate this number given that it is dependent on container&#39;s width? Is there a better way to implement the up/down functionality?

&lt;!-- begin snippet: js hide: true console: false babel: false --&gt;

&lt;!-- language: lang-css --&gt;

    .grid {
      display: flex;
      flex-wrap: wrap;
      align-content: flex-start;
      width: 250px;
      height: 200px;
      background-color: #ddd;
      padding: 10px 0 0 10px;
    }

    .item {
      width: 50px;
      height: 50px;
      background-color: red;
      margin: 0 10px 10px 0;
    }

    .active.item {
      outline: 5px solid black;
    }

&lt;!-- language: lang-html --&gt;

    &lt;div id=&quot;grid&quot; class=&quot;grid&quot;&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item active&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
      &lt;div class=&quot;item&quot;&gt;&lt;/div&gt;
    &lt;/div&gt;

&lt;!-- end snippet --&gt;

  [1]: https://i.stack.imgur.com/aRSuq.png

How to calculate the amount of flexbox items in a row?

   I&#39;m new to vuejs but I was trying to get the window size whenever I 
   resize it so that i can compare it to some value for a function that I 
   need to apply depending on the screen size. I also tried using the 
   watch property but not sure how to handle it so that&#39;s probably why it didn&#39;t work 
 
      methods: {

        elem() {
         this.size = window.innerWidth;
         return this.size;
       },
      mounted() {
        if (this.elem &lt; 767){ //some code }
       }

Vue JS - How to get window size whenever it changes

I am getting the below error while sending keys.

Result Message:

    System.InvalidOperationException : unknown error: call function result missing &#39;value&#39;
      (Session info: chrome=65.0.3325.146)
      (Driver info: chromedriver=2.33.506120 (e3e53437346286c0bc2d2dc9aa4915ba81d9023f),platform=Windows NT 10.0.14393 x86_64)

I have updated the chrome driver to 2.36 but still my code search for 2.33?

Any idea ?

unknown error: call function result missing &#39;value&#39; for Selenium Send Keys even after chromedriver upgrade

About two months ago we started using Rollbar to notify us of various errors in our Web App. Ever since then we have been getting the occasional error:

`ResizeObserver loop limit exceeded`

The thing that confuses me about this is that we are not using `ResizeObserver` and I have investigated the only plugin which I thought could possibly be the culprit, namely:

[Aurelia Resize][1]

But it doesn&#39;t appear to be using `ResizeObserver` either.

What is also confusing is that these error messages have been occuring since January but `ResizeObserver` support has only recently been added to Chrome 65.

The browser versions that have been giving us this error are:

 - Chrome: 63.0.3239 (ResizeObserver loop limit exceeded)
 - Chrome: 64.0.3282 (ResizeObserver loop limit exceeded)
 - Edge: 14.14393 (SecurityError)
 - Edge: 15.15063 (SecurityError)

So I was wondering if this could possibly be a browser bug? Or perhaps an error that actually has nothing to do with `ResizeObserver`?

  [1]: https://www.npmjs.com/package/aurelia-resize

ResizeObserver - loop limit exceeded

I&#39;m getting the error message..

&gt; Uncaught (in promise) DOMException: play() failed because the user didn&#39;t interact with the document first.

..when trying to play video on desktop using Chrome version 66.

I did find an ad that began playback automatically on a website however using the following HTML:

    &lt;video
        title=&quot;Advertisement&quot;
        webkit-playsinline=&quot;true&quot;
        playsinline=&quot;true&quot;
        style=&quot;background-color: rgb(0, 0, 0); position: absolute; width: 640px; height: 360px;&quot;
        src=&quot;http://ds.serving-sys.com/BurstingRes/Site-2500/Type-16/1ff26f6a-aa27-4b30-a264-df2173c79623.mp4&quot;
        autoplay=&quot;&quot;&gt;&lt;/video&gt;

So is by-passing Chrome v66&#39;s autoplay blocker really as easy as just adding the `webkit-playsinline=&quot;true&quot;`, `playsinline=&quot;true&quot;`, and `autoplay=&quot;&quot;` attributes to the `&lt;video&gt;` element? Are there any negative consequences to this?

How to handle &quot;Uncaught (in promise) DOMException: play() failed because the user didn&#39;t interact with the document first.&quot; on Desktop with Chrome 66?

I know I can use Chrome on a desktop or Android device to “Add to Home screen”. I know I can use “Add to homes screen” in Safari iOS.

But, can I use “Add to home screen” feature in Chrome for iOS?

Can I use Add to home screen in Chrome on an iOS device?

Audio autoplay is working in Mozilla, Microsoft Edge and old Google Chrome as well but not in new Google Chrome.

They have blocked the autoplay. is there any way to make it audio autoplay in Google Chrome?

How to make audio autoplay on chrome

I have just download youtube-dl so I can download video and audio files from youtube. 

I want to download the best audio from the following video: https://www.youtube.com/watch?v=uWusmdmc0to

When I do a search for all formats with youtube-dl I get the following results:

&lt;pre&gt;
format code  extension  resolution note
249          webm       audio only DASH audio   58k , opus @ 50k, 18.99MiB
250          webm       audio only DASH audio   75k , opus @ 70k, 25.20MiB
140          m4a        audio only DASH audio  131k , m4a_dash container, mp4a.40.2@128k, 52.40MiB
251          webm       audio only DASH audio  147k , opus @160k, 50.95MiB
171          webm       audio only DASH audio  149k , vorbis@128k, 52.64MiB
278          webm       256x144    144p  109k , webm container, vp9, 25fps, video only, 34.62MiB
160          mp4        256x144    144p  117k , avc1.4d400c, 25fps, video only, 37.86MiB
242          webm       426x240    240p  245k , vp9, 25fps, video only, 75.13MiB
133          mp4        426x240    240p  258k , avc1.4d4015, 25fps, video only, 81.39MiB
243          webm       640x360    360p  492k , vp9, 25fps, video only, 142.99MiB
134          mp4        640x360    360p  673k , avc1.4d401e, 25fps, video only, 215.29MiB
244          webm       854x480    480p  828k , vp9, 25fps, video only, 256.58MiB
135          mp4        854x480    480p 1516k , avc1.4d401e, 25fps, video only, 408.56MiB
247          webm       1280x720   720p 1882k , vp9, 25fps, video only, 526.18MiB
136          mp4        1280x720   720p 3012k , avc1.4d401f, 25fps, video only, 803.36MiB
248          webm       1920x1080  1080p 3622k , vp9, 25fps, video only, 938.81MiB
137          mp4        1920x1080  1080p 4724k , avc1.640028, 25fps, video only, 1.44GiB
271          webm       2560x1440  1440p 9253k , vp9, 25fps, video only, 2.86GiB
313          webm       3840x2160  2160p 18685k , vp9, 25fps, video only, 6.33GiB
17           3gp        176x144    small , mp4v.20.3, mp4a.40.2@ 24k
36           3gp        320x180    small , mp4v.20.3, mp4a.40.2
43           webm       640x360    medium , vp8.0, vorbis@128k
18           mp4        640x360    medium , avc1.42001E, mp4a.40.2@ 96k
22           mp4        1280x720   hd720 , avc1.64001F, mp4a.40.2@192k (best)
&lt;/pre&gt;

What is the best choice to get the best audio file? The first five are audio only. Do I need to pick one here? Or is the last one MP4 HD720 the best option and then convert it to MP3?

Thanks!

Download the best quality audio file with youtube-dl

I&#39;m making a little graphic interface with Python 3 which should download a youtube video with its URL.
I used the `youtube_dl` module for that.
This is my code :
```
import youtube_dl # Youtube_dl is used for download the video

ydl_opt = {&quot;outtmpl&quot; : &quot;/videos/%(title)s.%(ext)s&quot;, &quot;format&quot;: &quot;bestaudio/best&quot;} # Here we give some advanced settings. outtmpl is used to define the path of the video that we are going to download

def operation(link):
    &quot;&quot;&quot;
    Start the download operation
    &quot;&quot;&quot;
    try:
        with youtube_dl.YoutubeDL(ydl_opt) as yd: # The method YoutubeDL() take one argument which is a dictionary for changing default settings
            video = yd.download([link]) # Start the download
        result.set(&quot;Your video has been downloaded !&quot;)
    except Exception:
        result.set(&quot;Sorry, we got an error.&quot;)

operation(&quot;https://youtube.com/watch?v=...&quot;)

```
When I execute my code, I get this error: 
```
ERROR: YouTube said: Unable to extract video data
```
I saw [here][1] that it was because it doesn&#39;t find any video info, how can I resolve this problem?

  [1]: https://github.com/ytdl-org/youtube-dl/blob/d4f53af482cc47b0473a3576da7ad902bea4ac39/youtube_dl/extractor/youtube.py#L1831

Content Type	Original Author	Original Content on Stackoverflow
Question	Cannon Moyer	View Question on Stackoverflow
Solution 1 - Javascript	Maksim Volkov	View Answer on Stackoverflow
Solution 2 - Javascript	Hussnain sheikh	View Answer on Stackoverflow

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