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And welcome back to the second web developer, fundamental, another very important aspect of being

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a web developer, and that is the fact that we have multiple Web browsers.

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Now, if you remember Tim Burners, Lee, the inventor of the World Wide Web, created it because we

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needed a standard way to share documents amongst each other and through HTML and JavaScript were able

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to read these files and actually have beautiful websites.

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Now, when we send these files over.

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Each of these browser's read the text in JavaScript and layout the Web page for us, but as you can

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see, each one of them is owned by a company and is a different browser.

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So that means they all have to agree on how they're going to read the HTML and JavaScript, because

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if they don't all agree, then, well, we need to create different file specific for each browser because

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each one of them has a different idea of what counts.

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And JavaScript is.

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And you know what, when the World Wide Web got started, we had something called the browser wars where

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each browser was kind of doing its own thing, implemented different things, and we still have that

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to this day.

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To some extent, there is a governing body which kind of creates standards now.

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But it is still a pain point for developers where we need to figure out that whenever we send our files

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to the Web browser, it all looks the same.

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And that is one of the biggest problems we have as developers.

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And you'll see tools later on in this course that try to solve that issue.

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But you'll always encounter this problem where we want to make sure that wherever your browser gets

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rendered, anybody can see your website.

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And not only that, we also have mobile phones now that access the Internet, we have iPads.

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So now not only do we have to worry about different browsers and whether they agree on what code works

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in each of these files, we also have to make sure that our websites look good on small screens, on

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big screens, on all sorts of different screens.

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And that is a very important concept, something that when you get to become a web developer, you'll

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encounter this problem where you have to test on each device, each browser to make sure everything

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works.

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And we'll use some tools that have developed over the years to solve these problems so that it's not

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as much as a pain point as it is or as it was.

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All right.

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One more lesson to go and then we're going to see on the other side.

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Bye bye.