George Brocklehurst makes things for the internet.

HTTP Safety Doesn't Happen by Accident

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Before the days of CSS, JavaScript, AJAX, and Web 2.0, there were two main ways for a Web user to tell their browser to make a request to a Web server:

Clicking on a link to a different page, and clicking on a button to submit a form.

Read this post in full on the thoughtbot blog: