x-frame-options express middleware

Express middleware to add an X-Frame-Options response header

![build status](http://travis-ci.org/domharrington/x-frame-options)

The X-Frame-Options header can be used to to indicate whether a browser is allowed to render a page within an </code> element or not.<br />This is helpful to prevent clickjacking attacks by ensuring your content is not embedded within other sites.<br />See more here: <a href="https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options</a>.</p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Example</h2><br />``<code class="bg-muted px-1 py-0.5 rounded text-sm font-mono"> js<br /> var express = require('express')<br /> var app = express()<br /> var xFrameOptions = require('x-frame-options')</p><p class="my-3"> app.use(xFrameOptions())</p><p class="my-3"> app.get('/', function (req, res) {<br /> res.get('X-Frame-Options') // === 'Deny'<br /> })</p><p class="my-3"> app.listen(3000)<br /></code>`<code class="bg-muted px-1 py-0.5 rounded text-sm font-mono"></p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Usage</h2><br /></code>`<code class="bg-muted px-1 py-0.5 rounded text-sm font-mono"> js<br /> var xFrameOptions = require('x-frame-options')<br /></code>``</p><p class="my-3"><h3 class="text-lg font-medium mt-4 mb-2">$3</h3></p><p class="my-3">Returns an express middleware function. Allows you to specify the value of the header, defaults to 'Deny' for the strongest protection.</p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Installation</h2></p><p class="my-3"> npm install x-frame-options --save</p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Credits</h2><br /><a href="https://github.com/domharrington/" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">Dom Harrington</a></p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">License</h2><br />Licensed under the <a href="http://opensource.org/licenses/bsd-license.php" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">New BSD License</a><br /></p></div></div></div><div data-state="inactive" data-orientation="horizontal" role="tabpanel" aria-labelledby="radix-_R_aav5ubrb_-trigger-dependencies" hidden="" id="radix-_R_aav5ubrb_-content-dependencies" tabindex="0" data-slot="tabs-content" class="flex-1 outline-none 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status](https://secure.travis-ci.org/domharrington/x-frame-options.png)](http://travis-ci.org/domharrington/x-frame-options)\n\nThe X-Frame-Options header can be used to to indicate whether a browser is allowed to render a page within an `\u003ciframe\u003e` element or not.\nThis is helpful to prevent clickjacking attacks by ensuring your content is not embedded within other sites.\nSee more here: [https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options](https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options).\n\n## Example\n``` js\n var express = require('express')\n var app = express()\n var xFrameOptions = require('x-frame-options')\n\n app.use(xFrameOptions())\n\n app.get('/', function (req, res) {\n res.get('X-Frame-Options') // === 'Deny'\n })\n\n app.listen(3000)\n```\n\n## Usage\n``` js\n var xFrameOptions = require('x-frame-options')\n```\n\n### var middleware = xFrameOptions(headerValue = 'Deny')\n\nReturns an express middleware function. 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focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive transition-[color,box-shadow] overflow-hidden border-transparent bg-secondary text-secondary-foreground [a&]:hover:bg-secondary/90 font-mono">v1.0.0</span></div></div><p class="text-lg text-muted-foreground">Express middleware to add an X-Frame-Options response header</p><div class="flex flex-wrap gap-1.5"><a href="/search?q=x-frame-options"><span data-slot="badge" class="inline-flex items-center justify-center rounded-md border px-2 py-0.5 w-fit whitespace-nowrap shrink-0 [&>svg]:size-3 gap-1 [&>svg]:pointer-events-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive transition-[color,box-shadow] overflow-hidden text-foreground [a&]:hover:bg-accent [a&]:hover:text-accent-foreground text-xs font-normal hover:bg-accent">x-frame-options</span></a><a href="/search?q=security"><span data-slot="badge" class="inline-flex items-center justify-center rounded-md border px-2 py-0.5 w-fit whitespace-nowrap shrink-0 [&>svg]:size-3 gap-1 [&>svg]:pointer-events-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive transition-[color,box-shadow] overflow-hidden text-foreground [a&]:hover:bg-accent [a&]:hover:text-accent-foreground text-xs font-normal hover:bg-accent">security</span></a><a href="/search?q=middleware"><span data-slot="badge" class="inline-flex items-center justify-center rounded-md border px-2 py-0.5 w-fit whitespace-nowrap shrink-0 [&>svg]:size-3 gap-1 [&>svg]:pointer-events-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive transition-[color,box-shadow] overflow-hidden text-foreground [a&]:hover:bg-accent [a&]:hover:text-accent-foreground text-xs font-normal hover:bg-accent">middleware</span></a><a href="/search?q=express"><span data-slot="badge" class="inline-flex items-center justify-center rounded-md border px-2 py-0.5 w-fit whitespace-nowrap shrink-0 [&>svg]:size-3 gap-1 [&>svg]:pointer-events-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive transition-[color,box-shadow] overflow-hidden text-foreground [a&]:hover:bg-accent [a&]:hover:text-accent-foreground text-xs font-normal hover:bg-accent">express</span></a></div><div class="flex flex-wrap gap-4 text-sm text-muted-foreground"><span class="flex items-center gap-1.5"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-download h-4 w-4"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path><polyline points="7 10 12 15 17 10"></polyline><line x1="12" x2="12" y1="15" y2="3"></line></svg><span class="font-medium text-foreground">0</span>/week</span><span class="flex items-center gap-1.5"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-calendar h-4 w-4"><path d="M8 2v4"></path><path d="M16 2v4"></path><rect width="18" height="18" x="3" y="4" rx="2"></rect><path d="M3 10h18"></path></svg>Updated 3 years ago</span><span class="flex items-center gap-1.5"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-scale h-4 w-4"><path d="m16 16 3-8 3 8c-.87.65-1.92 1-3 1s-2.13-.35-3-1Z"></path><path d="m2 16 3-8 3 8c-.87.65-1.92 1-3 1s-2.13-.35-3-1Z"></path><path d="M7 21h10"></path><path d="M12 3v18"></path><path d="M3 7h2c2 0 5-1 7-2 2 1 5 2 7 2h2"></path></svg>BSD-2-Clause</span></div><div class="text-sm"><span class="text-muted-foreground">Published by </span><a class="font-medium hover:underline" href="/~Dom%20Harrington">Dom Harrington</a></div></div><div class="w-full space-y-4 lg:w-80"><div class="rounded-lg border bg-card"><div dir="ltr" data-orientation="horizontal" data-slot="tabs" class="flex flex-col gap-2"><div role="tablist" aria-orientation="horizontal" data-slot="tabs-list" class="text-muted-foreground inline-flex h-9 items-center w-full justify-start rounded-none border-b bg-transparent p-0" tabindex="-1" data-orientation="horizontal" style="outline:none"><button type="button" role="tab" aria-selected="true" aria-controls="radix-_R_36av5ubrb_-content-npm" data-state="active" 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items-center justify-center rounded-lg p-[3px]" tabindex="-1" data-orientation="horizontal" style="outline:none"><button type="button" role="tab" aria-selected="true" aria-controls="radix-_R_aav5ubrb_-content-readme" data-state="active" id="radix-_R_aav5ubrb_-trigger-readme" data-slot="tabs-trigger" class="data-[state=active]:bg-background dark:data-[state=active]:text-foreground focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:outline-ring dark:data-[state=active]:border-input dark:data-[state=active]:bg-input/30 text-foreground dark:text-muted-foreground inline-flex h-[calc(100%-1px)] flex-1 items-center justify-center gap-1.5 rounded-md border border-transparent px-2 py-1 text-sm font-medium whitespace-nowrap transition-[color,box-shadow] focus-visible:ring-[3px] focus-visible:outline-1 disabled:pointer-events-none disabled:opacity-50 data-[state=active]:shadow-sm [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4" tabindex="-1" 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[&_svg:not([class*='size-'])]:size-4" tabindex="-1" data-orientation="horizontal" data-radix-collection-item="">Versions<span class="ml-1.5 text-xs text-muted-foreground">(2)</span></button></div><div data-state="active" data-orientation="horizontal" role="tabpanel" aria-labelledby="radix-_R_aav5ubrb_-trigger-readme" id="radix-_R_aav5ubrb_-content-readme" tabindex="0" data-slot="tabs-content" class="flex-1 outline-none mt-6" style="animation-duration:0s"><div class="relative"><div class="prose prose-sm dark:prose-invert max-w-none overflow-hidden rounded-lg border p-6" style="max-height:500px"><p><h1 class="text-2xl font-bold mt-6 mb-4">x-frame-options express middleware</h1></p><p class="my-3">Express middleware to add an X-Frame-Options response header</p><p class="my-3"><a href="https://secure.travis-ci.org/domharrington/x-frame-options.png" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">![build status</a>](http://travis-ci.org/domharrington/x-frame-options)</p><p class="my-3">The X-Frame-Options header can be used to to indicate whether a browser is allowed to render a page within an <code class="bg-muted px-1 py-0.5 rounded text-sm font-mono"><iframe></code> element or not.<br />This is helpful to prevent clickjacking attacks by ensuring your content is not embedded within other sites.<br />See more here: <a href="https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options</a>.</p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Example</h2><br />``<code class="bg-muted px-1 py-0.5 rounded text-sm font-mono"> js<br /> var express = require('express')<br /> var app = express()<br /> var xFrameOptions = require('x-frame-options')</p><p class="my-3"> app.use(xFrameOptions())</p><p class="my-3"> app.get('/', function (req, res) {<br /> res.get('X-Frame-Options') // === 'Deny'<br /> })</p><p class="my-3"> app.listen(3000)<br /></code>`<code class="bg-muted px-1 py-0.5 rounded text-sm font-mono"></p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Usage</h2><br /></code>`<code class="bg-muted px-1 py-0.5 rounded text-sm font-mono"> js<br /> var xFrameOptions = require('x-frame-options')<br /></code>``</p><p class="my-3"><h3 class="text-lg font-medium mt-4 mb-2">$3</h3></p><p class="my-3">Returns an express middleware function. Allows you to specify the value of the header, defaults to 'Deny' for the strongest protection.</p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Installation</h2></p><p class="my-3"> npm install x-frame-options --save</p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">Credits</h2><br /><a href="https://github.com/domharrington/" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">Dom Harrington</a></p><p class="my-3"><h2 class="text-xl font-semibold mt-5 mb-3">License</h2><br />Licensed under the <a href="http://opensource.org/licenses/bsd-license.php" class="text-primary hover:underline" target="_blank" rel="noopener noreferrer">New BSD License</a><br /></p></div></div></div><div data-state="inactive" data-orientation="horizontal" role="tabpanel" aria-labelledby="radix-_R_aav5ubrb_-trigger-dependencies" hidden="" id="radix-_R_aav5ubrb_-content-dependencies" tabindex="0" data-slot="tabs-content" class="flex-1 outline-none mt-6"></div><template id="P:3"></template></div></div></div><div hidden id="S:3"><div data-state="inactive" data-orientation="horizontal" role="tabpanel" aria-labelledby="radix-_R_aav5ubrb_-trigger-versions" hidden="" id="radix-_R_aav5ubrb_-content-versions" tabindex="0" data-slot="tabs-content" class="flex-1 outline-none mt-6"></div></div><script>$RS=function(a,b){a=document.getElementById(a);b=document.getElementById(b);for(a.parentNode.removeChild(a);a.firstChild;)b.parentNode.insertBefore(a.firstChild,b);b.parentNode.removeChild(b)};$RS("S:3","P:3")</script><script>$RC("B:1","S:1")</script></body></html>