![]() The important thing to note about CORS is that the configuration/settings are done on the server and enforced by both the server and your browser. It can reject all POST requests but allow GETs and PUTs. It can reject requests from but accept requests from. It can reject requests that need cookies. With CORS, the server is allowed to specify which cross-origin requests it will accept vs reject. If this request was allowed and your cookie was included, the owner of malicious.site would be able to make requests on your behalf and read your account details. While you are browsing, you accidentally visit malicious.site, which makes a request to that looks like this: // Fetch request made from Let’s say you are logged in to and you have a cookie set with indicating that you are logged in. Your browser holds a lot of state about you for every website you visit. Reactiflux is our recommended Discord community.If you’ve written any frontend code, you’ve likely encountered a CORS error before, like this:Īccess to _ has been blocked by CORS policyĬross-Origin Resource Sharing (CORS) is a protocol that defines how web requests should be handled when they are across different URLs. Reddit is a great format, but sometimes you need to chat in real time. Scrimba's React course by /u/mrborgen86.and /u/vcarl's recommended reading list for professionals./u/acemarke's suggested resources for learning React, JS, and more.This is not a place for prominent commercial activities such as recruiting, lead generation, marketing, market research, or other solicitation, except in posts dedicated to that purpose. This is a community, not a free audience.r/reactjs follows the Reactiflux policy on commercial activity. This subreddit is focused on technical discussion of React, for career discussion check out /r/cscareerquestions or #jobs-advice in Reactiflux.If you share something from an AI, please also include which service it came from as well as an original thought, like why the response is trustworthy or details about how you prompted. Please do not dump raw AI output as a post or comment.Please save portfolios for the weekly Sunday portfolio post.Demo videos must be accompanied by source code, preferably in a runnable environment like Codepen, CodeSandbox, Replit, Glitch, etc.If someone has a question that you've created an external answer to, we'd love if you share it! If you have a body of content you'd like to promote, our recommended way of doing so is to be an active and positive member of the subreddit. If you join this community to take value rather than contribute, the community will quickly react as though you are an intruder. There is seldom a single right answer, and there are valid reasons to choose between a range of tradeoffs between tools, approaches, and patterns. ![]() Respect that people have differences of opinionĮvery design or implementation choice carries a trade-off and numerous costs. Names that detract from a friendly, safe and welcoming environment for all will be addressed. Reddit has a long history of intentionally offensive usernames, but not here. Avoid using an alias or display name that might be offensive We are committed to providing a friendly, safe and welcoming environment for all, regardless of level of experience, gender identity and expression, sexual orientation, disability, neurodivergence, race, ethnicity, physical attributes, religion, nationality, or other aspect of identity. We all started somewhere, and we're all allowed to be who we are. When providing help, answer their question before making stylistic or tool suggestions. There’s no need to be mean or rude, keep unstructured critique to a minimum. Please be kind and courteous, friendly and professionalīe kind to your fellow human. If you believe someone is violating the code of conduct, please report the post or message, or contact the mods. Interested in building mobile apps using React Native? Check out /r/reactnative! Code of Conduct ![]() A community for learning and developing web applications using React by Facebook.
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