<p dir="auto">For example without even having to analyze user Javascript classes, basic intellisense is missing:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://cloud.githubusercontent.com/assets/79215/12369394/374adca8-bbab-11e5-8537-771681f7fca6.png"><img src="https://cloud.githubusercontent.com/assets/79215/12369394/374adca8-bbab-11e5-8537-771681f7fca6.png" alt="screen shot 2016-01-15 at 5 11 58 pm" style="max-width: 100%;"></a></p>
<p dir="auto">I type <code class="notranslate">test.</code>, nothing happens so I type <code class="notranslate">Ctrl-Space</code> and after 1-2 seconds(!) an empty menu comes up.</p>
<p dir="auto">Function arguments aren't suggested:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://cloud.githubusercontent.com/assets/79215/12369402/60b84a76-bbab-11e5-8993-1363213ebd4c.png"><img src="https://cloud.githubusercontent.com/assets/79215/12369402/60b84a76-bbab-11e5-8993-1363213ebd4c.png" alt="screen shot 2016-01-15 at 5 13 46 pm" style="max-width: 100%;"></a></p>
<p dir="auto">My <code class="notranslate">jsconfig.json</code>:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="{
    &quot;compilerOptions&quot;: {
        &quot;target&quot;: &quot;ES6&quot;,
        &quot;module&quot;: &quot;commonjs&quot;
    },
    &quot;exclude&quot;: [
        &quot;node_modules&quot;
    ]
}"><pre class="notranslate"><code class="notranslate">{
    "compilerOptions": {
        "target": "ES6",
        "module": "commonjs"
    },
    "exclude": [
        "node_modules"
    ]
}
</code></pre></div>
<p dir="auto">See GIF again:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://cloud.githubusercontent.com/assets/79215/12369339/64c18c28-bbaa-11e5-85ef-a1ba5dd59be8.gif"><img src="https://cloud.githubusercontent.com/assets/79215/12369339/64c18c28-bbaa-11e5-85ef-a1ba5dd59be8.gif" alt="vs-code-why" data-animated-image="" style="max-width: 100%;"></a></p>
<p dir="auto">Literally none of the editor features work.</p>
<p dir="auto">My <code class="notranslate">jsconfig.json</code>:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="{
    &quot;compilerOptions&quot;: {
        &quot;target&quot;: &quot;ES6&quot;,
        &quot;module&quot;: &quot;commonjs&quot;
    },
    &quot;exclude&quot;: [
        &quot;node_modules&quot;
    ]
}"><pre class="notranslate"><code class="notranslate">{
    "compilerOptions": {
        "target": "ES6",
        "module": "commonjs"
    },
    "exclude": [
        "node_modules"
    ]
}
</code></pre></div>