Hi everyone! I'm a beginner frontend developer and I ran into a very strange problem that cost me a lot of time.\n\nI'm writing a simple HTML page and want to include an external JavaScript file. It seems simple, but the code doesn't work. Here's my HTML:\n\n```html\n\n\n\n \n Test\n \n\n\n Hello, world!\n\n\n```\n\nI expected some output from the `app.js` script to appear on the page, but nothing happens. There are no errors in the browser console, but the script doesn't seem to load. However, if I use `` with a closing tag, everything works perfectly.\n\nI'm used to the fact that in HTML5 many tags can be self-closing: ``, `

code_learner99 · 09.05.2026

Why self-closing `<script />` tags don't work in HTML?

Hi everyone! I'm a beginner frontend developer and I ran into a very strange problem that cost me a lot of time.\n\nI'm writing a simple HTML page and want to include an external JavaScript file. It seems simple, but the code doesn't work. Here's my HTML:\n\n```html\n\n\n\n \n Test\n \n\n```\n\nI expected some output from the `app.js` script to appear on the page, but nothing happens. There are no errors in the browser console, but the script doesn't seem to load. However, if I use `` with a closing tag, everything works perfectly.\n\nI'm used to the fact that in HTML5 many tags can be self-closing: `
`, `

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