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In what cases will HTTP_REFERER be empty

...the window/tab. clicked a link in an external application. switched from a https URL to a http URL. switched from a https URL to a different https URL. has security software installed (antivirus/firewall/etc) which strips the referrer from all requests. is behind a proxy which strips the referrer fr...
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Updating Bootstrap to version 3 - what do I have to do?

...x add html5shiv.js to add support of HTML5 elements to IE8 add respond.js (https://github.com/scottjehl/Respond) for media query support in IE. NOTE this won't work with CDN, see: IE8 issue with Twitter Bootstrap 3 If you use Glyphicons, you will have to add them from http://glyphicons.getbootstrap....
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What is the purpose of the “role” attribute in HTML?

...ML but were deprecated. However, they are now defined by HTML 5, see here: https://www.w3.org/WAI/PF/aria/roles#abstract_roles_header The purpose of the role attribute is to identify to parsing software the exact function of an element (and its children) as part of a web application. This is mostly...
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Alternative to iFrames with HTML5

... object is an easy alternative in HTML5: <object data="https://blogs.claritycon.com/blog/2016/03/bower-packages-asp-net-core-1-0/" width="400" height="300" type="text/html"> Alternative Content </object> You can also try embed: <embed src="https://bl...
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What is ?= in Makefile

...eUploader: { brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
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Using HTML5/Canvas/JavaScript to take in-browser screenshots

...ent's entire desktop using getUserMedia(): Have a look at this example: https://www.webrtc-experiment.com/Pluginfree-Screen-Sharing/ The client will have to be using chrome (for now) and will need to enable screen capture support under chrome://flags. ...
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Difference between Node object and Element object?

...ode.prototype true Here are some docs for the Node and Element classes: https://developer.mozilla.org/en-US/docs/DOM/Node https://developer.mozilla.org/en-US/docs/DOM/Element share | improve this...
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How to add a filter class in Spring Boot?

...etRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletResponse; import org.springframework.context.annotation.Profile; import org.springframework.stereotype.Component; @Component public class XClacksOverhead implements Filter { public static final String X_CLACKS...
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How to make a website secured with https

... What should I do to prepare my website for https. (Do I need to alter the code / Config) You should keep best practices for secure coding in mind (here is a good intro: http://www.owasp.org/index.php/Secure_Coding_Principles ), otherwise all you need is a correctl...
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Are HTTPS URLs encrypted?

Are all URLs encrypted when using TLS/SSL (HTTPS) encryption? I would like to know because I want all URL data to be hidden when using TLS/SSL (HTTPS). ...