{"componentChunkName":"component---src-templates-blog-post-js","path":"/JavaScript/javascript-concept-7---==-and-===/","webpackCompilationHash":"f92dbf25810602c1889e","result":{"data":{"site":{"siteMetadata":{"title":"Web Devlog","author":"RossenaHuh","siteUrl":"https://github.com/rossenahuh","comment":{"disqusShortName":"RossenaHuh","utterances":"rossenahuh/my-dev-blog.git"},"sponsor":{"buyMeACoffeeId":"rossena"}}},"markdownRemark":{"id":"1d99dbbc-9481-5312-9dcf-a05d1d73ce61","excerpt":"What’s the difference between == and === ?==\n\nChecks for equality\n\n\n=== \nChecks for equality and type\n\n\n== in JavaScript sees both null and undefined as having no value eventhough they have different types","html":"<h2 id=\"whats-the-difference-between--and--\"><a href=\"#whats-the-difference-between--and--\" aria-label=\"whats the difference between  and   permalink\" class=\"anchor\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"16\" version=\"1.1\" viewBox=\"0 0 16 16\" width=\"16\"><path fill-rule=\"evenodd\" d=\"M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z\"></path></svg></a>What’s the difference between == and === ?</h2>\n<p><strong>==</strong>\n<br>\nChecks for <strong>equality</strong>\n<br>\n<br>\n<strong>===</strong> <br>\nChecks for <strong>equality and type</strong>\n<br>\n<br>\n== in JavaScript sees both null and undefined as having no value eventhough they have different types</p>\n<div class=\"gatsby-highlight\" data-language=\"js\"><pre class=\"language-js\"><code class=\"language-js\"><span class=\"token comment\">// checkout this badness</span>\n<span class=\"token keyword\">let</span> foo <span class=\"token comment\">// undefined</span>\n<span class=\"token keyword\">let</span> temp <span class=\"token operator\">=</span> <span class=\"token keyword\">null</span> <span class=\"token comment\">// null</span>\n\n<span class=\"token comment\">// compare the two</span>\nconsole<span class=\"token punctuation\">.</span><span class=\"token function\">log</span><span class=\"token punctuation\">(</span>foo <span class=\"token operator\">==</span> temp<span class=\"token punctuation\">)</span> <span class=\"token comment\">// true(boolean), what??</span></code></pre></div>","frontmatter":{"title":"JavaScript Concept 7 - == and ===","date":"July 07, 2019"}}},"pageContext":{"isCreatedByStatefulCreatePages":false,"slug":"/JavaScript/javascript-concept-7---==-and-===/","previous":{"fields":{"slug":"/JavaScript/javascript-concept-6---null-undefined-undeclared/"},"frontmatter":{"title":"JavaScript Concept 6 - Null Undefined Undeclared","category":"JavaScript"}},"next":{"fields":{"slug":"/JavaScript/javascript-concept-8---event-loop/"},"frontmatter":{"title":"JavaScript Concept 8 - Event Loop","category":"JavaScript"}}}}}