Brand icons are often submitted by the company itself, and are useful for building things like buttons for social authentication or payment. These icons include Twitter, Facebook, Spotify, Apple, and even freeCodeCamp:
Given that, if you're not using any of the listed fonts on your page already, and don't have any strong preferences between them, I'd just go with the default (i.e. don't select any font in the form). It's likely to look OK to most users, and match what they're used to seeing on other sites.
Just so you guys know, it seems that Windows only likes Trebuchet MS as the specified font when you select the XFBML version of the Facebook Like button box_count layout that displays the Send button underneath the main Like button. Use any other font selection than Trebuchet MS and the word "Send" gets cut off on the right side on Windows. Mac is fine either way. You can see this in action by going to the main Facebook Developers Like button page and specifying XFBML, checking the Send box, and selecting box_count layout.
The like button on the social networking website Facebook was first enabled on February 9, 2009. The like button enables users to easily interact with status updates, comments, photos and videos, links shared by friends, and advertisements. Once clicked by a user, the designated content appears in the News Feeds of that user's friends, and the button also displays the number of other users who have liked the content, including a full or partial list of those users. The like button was extended to comments in June 2010. After extensive testing and years of questions from the public about whether it had an intention to incorporate a "Dislike" button, Facebook officially rolled out "Reactions" to users worldwide on February 24, 2016, letting users long-press on the like button for an option to use one of five pre-defined emotions, including "Love", "Haha", "Wow", "Sad", or "Angry". Reactions were also extended to comments in May 2017, and had a major graphical overhaul in April 2019.
The like button is one of Facebook's social plug-ins, in which the button can be placed on third-party websites. Its use centers around a form of an advertising network, in which it gathers information about which users visit what websites. This form of functionality, a sort of web beacon, has been significantly criticized for privacy. Privacy activist organizations have urged Facebook to stop its data collection through the plug-in, and governments have launched investigations into the activity for possible privacy law violations. Facebook has stated that it anonymizes the information after three months, and that the data collected is not shared or sold to third parties. Additionally, the like button's potential use as a measurement of popularity has caused some companies to sell likes through fake Facebook accounts, which in turn have sparked complaints from some companies advertising on Facebook that have received an abundance of fake likes that have distorted proper user metrics. Facebook states in its Terms of Service agreement that users may only create one personal page, and it has ongoing efforts against the spread of fake accounts.
The like button is a feature of social networking service Facebook, where users can like content such as status updates, comments, photos and videos, links shared by friends, and advertisements. The feature was activated February 9, 2009. It is also a feature of the Facebook Platform that enables participating websites to display a button that enables sharing the site's content with friends.
When a user clicks the like button, the content appears in the News Feeds of that user's friends. The button also displays the number of users who liked each piece of content, and may show a full or partial list of those users. The ability to like users' comments was added in June 2010, and the ability to react with one of five pre-defined emotions, including "Love", "Haha", "Wow", "Sad", or "Angry", was added in May 2017.
After more than a year in testing, which included October 2015 availability in Ireland and Spain, Facebook officially rolled out "Reactions" to users worldwide on February 24, 2016. The feature allows users to long-press on the like button to get options between five pre-defined emotions ranging from "Love", "Haha", "Wow", "Sad", and "Angry". In June 2017, in celebration of Pride month, Facebook introduced a rainbow flag as part of its Reactions options.
The Like button is one of Facebook's social plug-ins, which are features for websites outside Facebook as part of its Open Graph. Speaking at the company's F8 developer conference on April 21, 2010, the day of the launch, CEO Mark Zuckerberg said "We are building a Web where the default is social". The like button is implemented similarly to an advertising network, in that as more sites participate, Facebook is given a vast amount of information about who visits which websites and when. When loading a website that has the like button enabled, the user's web browser connects to Facebook's servers, which record which website was visited, and by what user.
A week after the release of the social plugins, Facebook announced that 50,000 websites had installed the features, including the like button. Five months later, the number had increased to 2 million websites.
Social network like buttons on websites other than their own are often used as web beacons to track user activities for targeted advertising such as behavioral targeting combined with personally identifiable information, and may be considered a breach of Internet privacy. In June 2010, the American Civil Liberties Union, Center for Democracy and Technology, Center for Digital Democracy, Consumer Action, Consumer Watchdog, Electronic Frontier Foundation, Electronic Privacy Information Center, Privacy Activism, Privacy Lives, and Privacy Rights Clearinghouse sent an open letter to Facebook requesting that it "Do not retain data about specific visitors to third party sites that incorporate "social plugins" or the "like" button, unless the site visitor chooses to interact with those tools."
In February 2013, legal action was brought against Facebook by patent-holding company Rembrandt Social Media. Rembrandt owns several patents taken out by Dutch programmer Joannes Jozef Everardus van der Meer, who died in 2004. These include patents filed in 1998 relating to Van der Meer's fledgling social network Surfbook, including, according to legal papers filed by the patent holder, the ability for users to approve data using a "like" button.
When using button classes on elements that are used to trigger in-page functionality (like collapsing content), rather than linking to new pages or sections within the current page, these links should be given a role="button" to appropriately convey their purpose to assistive technologies such as screen readers.
Some other npm packages that wrap offer pre-built custom buttons for React Native with some features like icon support, theming, custom coloring, etc. But, those libraries are not very popular among developer communities due to the easiness of custom button creation and fully-featured UI kits. For example, you can build any custom button easily with the steps explained in this tutorial. On the other hand, you can use a fully-featured UI kit like Native Base, which offers many pre-built custom button styles.
The Boomerang option works just like it does on Instagram. All you need to do is tap the record button to stitch together a burst of photos to create a short animation that plays forward and backward.
The button font is Roboto Medium, a TrueType font. To install, first download the Roboto font and unzip the download bundle. On Mac, just double-click Roboto-Medium.ttf, then click "Install Font". On Windows, drag the file to "My Computer" > "Windows" > "Fonts" folder. Do not use other fonts on the button, except as noted for situations with Matching your own app's style.
The web's security model is rooted in the same-origin policy. Code from should only have access to 's data, and should certainly never be allowed access. Each origin is kept isolated from the rest of the web, giving developers a safe sandbox in which to build and play. In theory, this is perfectly brilliant. In practice, attackers have found clever ways to subvert the system.Cross-site scripting (XSS) attacks, for example, bypass the same origin policy by tricking a site into delivering malicious code along with the intended content. This is a huge problem, as browsers trust all of the code that shows up on a page as being legitimately part of that page's security origin. The XSS Cheat Sheet is an old but representative cross-section of the methods an attacker might use to violate this trust by injecting malicious code. If an attacker successfully injects any code at all, it's pretty much game over: user session data is compromised and information that should be kept secret is exfiltrated to The Bad Guys. We'd obviously like to prevent that if possible.This overview highlights a defense that can significantly reduce the risk and impact of XSS attacks in modern browsers: Content Security Policy (CSP).Summary #Use allowlists to tell the client what's allowed and what isn't.Learn what directives are available.Learn the keywords they take.Inline code and eval() are considered harmful.Report policy violations to your server before enforcing them.Source allowlists #The issue exploited by XSS attacks is the browser's inability to distinguish between script that's part of your application and script that's been maliciously injected by a third-party. For example, the Google +1 button at the bottom of this page loads and executes code from in the context of this page's origin. We trust that code, but we can't expect the browser to figure out on its own that code from apis.google.com is awesome, while code from apis.evil.example.com probably isn't. The browser happily downloads and executes any code a page requests, regardless of source.Instead of blindly trusting everything that a server delivers, CSP defines the Content-Security-Policy HTTP header, which allows you to create an allowlist of sources of trusted content, and instructs the browser to only execute or render resources from those sources. Even if an attacker can find a hole through which to inject script, the script won't match the allowlist, and therefore won't be executed.Since we trust apis.google.com to deliver valid code, and we trust ourselves to do the same, let's define a policy that only allows script to execute when it comes from one of those two sources: 2b1af7f3a8