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Prop Input Time Form

📅 2026-06-19 | 📂 JavaScript

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The 404 page is an essential part of a website, playing a critical role in user experience and SEO optimization. A 404 page is returned by the server when a user attempts to access a page that does not exist or has been deleted. If the website owner does not set up a custom 404 page, dead links will appear, which negatively impacts search engine indexing when crawlers encounter such URLs.

Origin of 404 Not Found

It is said that before the Third Industrial Revolution, the internet was essentially a large central database located in room 404. At that time, all requests were manually handled by humans. If the requested file could not be found in the database, or if the user entered an incorrect file number, they would receive the response: "room 404: file not found". Later, as the internet grew, people began to use "404" as the standard error code for "file not found" on servers. Of course, the actual existence of room 404 in this story has not been verified.

Two Benefits of Setting Up a 404 Page

  • Guide users not to leave the website, enhancing user experience.
  • Prevent dead links on the website.

Learn more about HTTP Status Codes.

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