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Not an unsolved problem, but rather a technical question, which I hope is valuable enough to ask.

As a beginner web developer, I attempted to give a variable from a .js file to an .html file, to display a variable from the former on-screen - I desired to do so by the <script src=... parameter. The .js file I wanted to include in the .html is the one that contains the code, which creates the HTTP server (as of yet a simple one) and loads the .html file.

I was told that it is a bad idea, and I should use JSON objects instead. THe problem is therefore solved, but I'm interested: why was it a bad idea to include the script of Express.js within the HTML file?

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  • Because you'll get errors? Commented Dec 15, 2015 at 10:55
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    Express needs node. Because it's javascript doesn't mean it needs nothing more than a JS engine. Some javascript needs a browser (and frequently a DOM), some others have other needs. Commented Dec 15, 2015 at 10:56
  • @Andy I didn't, yet I have to admit that displaying variables did not work either. Commented Dec 15, 2015 at 10:57

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Express.js is Node.js web application framework. Lets simply call it backend javascript, which means it's designed to be run not in browser, but as part of Node.js application.

Just FYI:

There is a way to 'run' some Node modules in browser. There is tool called browserify .

Here what they are saying on their web site:

Use many of the tens of thousands of modules on NPM in the browser

I'm afraid that Express.js is not one of those 'many' modules.

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