In your preferences, change the version of javascript to ECMAScript 6.

   [![][1]][1]


  [1]: http://i.stack.imgur.com/bW4bW.png

Where can I find the plus sign at the center of a Floating Action Button?

Is it made by Android or do I need to do it by my self?

Android FAB plus sign not present on android drawable

I&#39;m curious why the Eloquent relationship for `hasMany` has a different signature than for `belongsToMany`. Specifically the custom join table name-- for a system where a given `Comment` belongs to many `Role`s, and a given `Role` would have many `Comment`s, I want to store the relationship in a table called `my_custom_join_table` and have the keys set up as `comment_key` and `role_key`.

    return $this-&gt;belongsToMany(&#39;App\Role&#39;, &#39;my_custom_join_table&#39;, &#39;comment_key&#39;, &#39;role_key&#39;); // works


But on the inverse, I can&#39;t define that custom table (at least the docs don&#39;t mention it):

    return $this-&gt;hasMany(&#39;App\Comment&#39;, &#39;comment_key&#39;, &#39;role_key&#39;);

If I have a `Role` object that `hasMany` `Comments`, but I use a non-standard table name to store that relationship, why can I use this non-standard table going one way but not the other?

hasMany vs belongsToMany in laravel 5.x

I&#39;m trying to run a piece of JavaScript code written in a tutorial that looks like this:

**main.js**

    import Vue from &#39;Vue&#39;;
    import Alert from &#39;./components/Alert.vue&#39;;
    
    new Vue({
        el: &#39;body&#39;,
    
        components: { Alert }
    })

However, PhpStorm is giving the following error:  

&gt; Import declarations are not supported by current JavaScript version

How I can get a newer(?) JavaScript version in PhpStorm? Is that really the problem here?

Import not working with JavaScript in PhpStorm/Webstorm

I'm trying to run a piece of JavaScript code written in a tutorial that looks like this:
main.js
<pre><code class="hljs language-javascript">import Vue from 'Vue';
import Alert from './components/Alert.vue';

new Vue({
 el: 'body',

 components: { Alert }
})
</code></pre>
However, PhpStorm is giving the following error:
> Import declarations are not supported by current JavaScript version
How I can get a newer(?) JavaScript version in PhpStorm? Is that really the problem here?

I&#39;m still fairly new at React, but I&#39;ve been grinding along slowly and I&#39;ve encountered something I&#39;m stuck on. 

I am trying to build a &quot;timer&quot; component in React, and to be honest I don&#39;t know if I&#39;m doing this right (or efficiently). In my code below, I set the state to return an object ```{ currentCount: 10 }``` and have been toying with ```componentDidMount```, ```componentWillUnmount```, and ```render``` and I can only get the state to &quot;count down&quot; from 10 to 9. 

Two-part question: What am I getting wrong? And, is there a more efficient way of going about using setTimeout (rather than using ```componentDidMount``` &amp; ```componentWillUnmount```)?

Thank you in advance.

    import React from &#39;react&#39;;
    
    var Clock = React.createClass({
    
      getInitialState: function() {
        return { currentCount: 10 };
      },
    
      componentDidMount: function() {
        this.countdown = setInterval(this.timer, 1000);
      },
    
      componentWillUnmount: function() {
        clearInterval(this.countdown);
      },
    
      timer: function() {
        this.setState({ currentCount: 10 });
      },
    
      render: function() {
        var displayCount = this.state.currentCount--;
        return (
          &lt;section&gt;
            {displayCount}
          &lt;/section&gt;
        );
      }
    
    });
    
    module.exports = Clock;

setInterval in a React app

I&#39;m developing a google chrome **packaged** app, when I put Sandbox in the `manifest.json`:

     {
      &quot;manifest_version&quot;: 2,
      &quot;name&quot;: &quot;WM32216&quot;,
      &quot;version&quot;: &quot;2.1&quot;,
      &quot;minimum_chrome_version&quot;: &quot;23&quot;,
      &quot;permissions&quot;:[&quot;webview&quot;, &quot;https://ajax.googleapis.com/*&quot;],
      &quot;sandbox&quot;:{
          &quot;pages&quot;:[&quot;index.html&quot;]
      },
      &quot;app&quot;: {
        &quot;background&quot;: {
          &quot;scripts&quot;: [&quot;main.js&quot;]
        }
      }
    }

An `onclick` event on my anchor tag works, and the flow of the app is complete EXCEPT THAT, icons from a CSS stylesheet don&#39;t load.

I got an `error` from the console that 

`File not found` ,

but those are just **fonts** so it&#39;s fine with me, 

The big problem is that, the video in the iframe doesn&#39;t play and I got additional error prior to the Font which are: 

&gt; VIDEOJS: ERROR: (CODE:4 MEDIA_ERR_SRC_NOT_SUPPORTED) The media could not be loaded, either because the server or network failed or because the format is not supported. 
&gt;
&gt; Not allowed to load local resource: blob:null/b818b32c-b762-4bd9-...
 
When I remove the sandbox in the manifest.json file, everything is good no errors in the console about the font, 

BUT when I **hit/click my anchor tag** that has a click event to load a new function in the js  I&#39;m getting the following **Console Error** :

&gt; Refused to execute inline event handler because it violates the following Content Security Policy directive: &quot;default-src &#39;self&#39; blob: filesystem: chrome-extension-resource:&quot;. Either the &#39;unsafe-inline&#39; keyword, a hash (&#39;sha256-...&#39;), or a nonce (&#39;nonce-...&#39;) is required to enable inline execution. Note also that &#39;script-src&#39; was not explicitly set, so &#39;default-src&#39; is used as a fallback.


Sorry for the very long detail,

I just need help with this because I&#39;m stuck here for 3 days already.

Refused to execute inline event handler because it violates CSP. (SANDBOX)

The story is, I should be able to put Bob, Sally and Jack into a box. I can also remove either from the box. When removed, no slot is left.

    people = [&quot;Bob&quot;, &quot;Sally&quot;, &quot;Jack&quot;]

I now need to remove, say, &quot;Bob&quot;. The new array would be:

    [&quot;Sally&quot;, &quot;Jack&quot;]

Here is my react component:

    ...
    
    getInitialState: function() {
      return{
        people: [],
      }
    },
    
    selectPeople(e){
      this.setState({people: this.state.people.concat([e.target.value])})
    },
    
    removePeople(e){
      var array = this.state.people;
      var index = array.indexOf(e.target.value); // Let&#39;s say it&#39;s Bob.
      delete array[index];
    },
    
    ...

Here I show you a minimal code as there is more to it (onClick etc). The key part is to delete, remove, destroy &quot;Bob&quot; from the array but `removePeople()` is not working when called. Any ideas? I was [looking at this][1] but I might be doing something wrong since I&#39;m using React.


  [1]: https://stackoverflow.com/questions/5767325/remove-a-particular-element-from-an-array-in-javascript

How to delete an item from state array?

I use custom errors ([es6-error][1]) allowing me to handle errors based on their class like so:

    import { DatabaseEntryNotFoundError, NotAllowedError } from &#39;customError&#39;;

    function fooRoute(req, res) {
      doSomethingAsync()
        .then(() =&gt; {
          // on resolve / success
          return res.send(200);
        })
        .catch((error) =&gt; {
          // on reject / failure
          if (error instanceof DatabaseEntryNotFoundError) {
   	        return res.send(404);
   	      } else if (error instanceof NotAllowedError) {
   	        return res.send(400);
   	      }
  	      log(&#39;Failed to do something async with an unspecified error: &#39;, error);
  	      return res.send(500);
        };
    }

Now I&#39;d rather use a switch for this type of flow, resulting in something like:

    import { DatabaseEntryNotFoundError, NotAllowedError } from &#39;customError&#39;;

    function fooRoute(req, res) {
      doSomethingAsync()
        .then(() =&gt; {
          // on resolve / success
          return res.send(200);
        })
        .catch((error) =&gt; {
          // on reject / failure
          switch (error instanceof) {
            case NotAllowedError:
    	      return res.send(400);
            case DatabaseEntryNotFoundError:
    	      return res.send(404);
            default:
    	      log(&#39;Failed to do something async with an unspecified error: &#39;, error);
    	      return res.send(500);
    	  }
        });
    }

[instanceof][2] doesn&#39;t work like that however. So the latter fails.

Is there any way to check an instance for its class in a switch statement?

  [1]: https://www.npmjs.com/package/es6-error
  [2]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/instanceof

How to use instanceof in a switch statement

I need to do something like:

    if (condition) {
        import something from &#39;something&#39;;
    }
    // ...
    if (something) {
        something.doStuff();
    }

The above code does not compile; it throws `SyntaxError: ... &#39;import&#39; and &#39;export&#39; may only appear at the top level`.

I tried using `System.import` as shown [here](http://www.2ality.com/2013/07/es6-modules.html#module-loader-api), but I don&#39;t know where `System` comes from. Is it an ES6 proposal that didn&#39;t end up being accepted? The link to &quot;programmatic API&quot; from that article dumps me to a [deprecated docs page](http://wiki.ecmascript.org/doku.php?id=harmony:module_loaders).



How can I conditionally import an ES6 module?

I would like to test if a JavaScript object is a [Proxy][1]. The trivial approach

    if (obj instanceof Proxy) ...

doesn&#39;t work here, nor does traversing the prototype chain for `Proxy.prototype`, since all relevant operations are effectively backed by the underlying target.

Is it possible to test if an arbitrary object is a Proxy?

  [1]: http://www.ecma-international.org/ecma-262/6.0/#sec-proxy-objects

How to test if an object is a Proxy?

After playing with ES6, I&#39;ve really started to like the new syntax and features available, but I do have a question about classes.

Are the new ES6 classes just syntactic sugar for the old prototypal pattern? Or is there more going on here behind the scenes? For example: 

    class Thing {
       //... classy stuff
      doStuff(){}
    }

vs:

    var Thing = function() {
      // ... setup stuff
    };

    Thing.prototype.doStuff = function() {}; // etc

Are ES6 classes just syntactic sugar for the prototypal pattern in Javascript?

The export statement below gives a syntax error 

    export default const hello = () =&gt; console.log(&quot;say hello&quot;)

why ?

I&#39;m only able to export named functions

    export function hello() {
      console.log(&quot;hello&quot;)
    }

What is the reason?



Is it possible to export Arrow functions in ES6/7?

How can I fix this alert in PhpStorm? 

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/hW3fD.png

And also how to get autocompletion for Route and other Facades?

Undefined class Route (Laravel in PhpStorm)

I understand how to increase the font size within an editor tab, but I&#39;d like to increase the font size of the main navigation menu and most importantly, the tab titles.  These do not change when I zoom in or out of an editor tab (using Cmd + mouse wheel on OSX). I do not see anything in the preferences menus.



How to increase menu and tab font size in IntelliJ JetBrains PyCharm, PhpStorm, RubyMine

I&#39;m using TypeScript style with single quotes, double quotes are used exclusively in HTML templates.

WebStorm/PhpStorm auto import adds `import` statements with double quotes and ruins the style. I guess this applies to all JetBrains products.

How can this behaviour be fixed?

WebStorm/PhpStorm double quotes in TypeScript auto import

In PhpStorm once you open several tabs they start disappearing automatically. How to turn that setting off?

Don&#39;t see a setting for this anywhere.

Make PhpStorm stop automatically closing tabs

Is there any way to disable the hints?

[![Parameter hints][1]][1]


  [1]: https://i.stack.imgur.com/Sjdx5.png

How to disable parameter name hints in PhpStorm?

I am trying to use new tools available for coding in JavaScript. I&#39;ve seen the post https://stackoverflow.com/questions/35772101/phpstorm-let-definition-are-not-supported-by-current-javascript-version. I&#39;ve tried as suggested over there, but do not work.

When I hover over the `export`

&gt; Export declarations are not supported by current JavaScript version

When I hover over the `yield`

&gt; Generators are not supported by current JavaScript version

and hovering over the `let`

&gt; Let definition are not supported by current JavaScript version

So the question is how to upgrade the JavaScript version?

WebStorm “Let definition are not supported by current JavaScript version”

How do you include a space before the closing tags in self closing tags with WebStorm/IntelliJ-based products?

Default settings turns `&lt;ReactComp /&gt;` to `&lt;ReactComp/&gt;`, which is against one of the rules ([jsx-space-before-closing][1]) in the commonly used AirBNBs Javascript style guide. 


  [1]: https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-space-before-closing.md

Add space in self closing tags before in self closing tags

I have a Protractor project which contains such a file:

    var FriendCard = function (card) {
        var webElement = card;
        var menuButton;
        var serialNumber;
    
        this.getAsWebElement = function () {
            return webElement;
        };
    
        this.clickMenuButton = function () {
            menuButton.click();
        };
    
        this.setSerialNumber = function (numberOfElements) {
            serialNumber = numberOfElements + 1;
            menuButton = element(by.xpath(&#39;.//*[@id=\&#39;mCSB_2_container\&#39;]/li[&#39; + serialNumber + &#39;]/ng-include/div/div[2]/i&#39;));
        };
    
        this.deleteFriend = function () {
            element(by.css(&#39;[ng-click=&quot;deleteFriend(person);&quot;]&#39;)).click();
            element(by.css(&#39;[ng-click=&quot;confirm()&quot;]&#39;)).click();
        }
    };
    module.exports = FriendCard;

Path to the file is `./pages/FriendCard.js`.

I have no problems with its import to another file using `require()`:

    var FriendCard = require(&#39;./../pages/FriendCard&#39;);

So, I&#39;ve decided to import this file to the TypeScript file just like that: 

    import {FriendCard} from &#39;./../pages/FriendCard&#39;

I&#39;m using WebStorm. It tells me that (**TS2305**) it has no exported member &#39;FriendCard&#39;. 

Maybe I have to configure tsconfig.json file somehow, but I still don&#39;t know how it works. Could you help me? 

How to import js-modules into TypeScript file?

I&#39;ve specified eslint configuration for my WebStorm project. But it does not seem to apply to code reformat feature. For example, it continues to format `import { something } from &#39;somewhere&#39;` as `import {something} from &#39;somewhere&#39;`.

Is there a way to make WebStorm to format code according to eslint configuration?

Content Type	Original Author	Original Content on Stackoverflow
Question	Bryan Miller	View Question on Stackoverflow
Solution 1 - Javascript	Naftali	View Answer on Stackoverflow

Import not working with JavaScript in PhpStorm/Webstorm

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

hasMany vs belongsToMany in laravel 5.x

Android FAB plus sign not present on android drawable

Attributions