Get all existing html tags with javascript

Question

I'm wondering if its possible to get all existing html tags(body, head, div, ul etc.) with javascript. By all existing i dont mean all on the page, but all valid. Is there a function that does that?

Also if there isn't - Is it somewhere in Firefox or Chrome files?

Do you mean all tags on the page, or all tag names that are considered valid HTML? Mozilla has a good reference: developer.mozilla.org/en-US/docs/Web/HTML/Element — Katana314
– Katana314, Commented Nov 2, 2015 at 20:04
all tag names that are considered valid HTML. I did also mean if its possible offline, without connection — Mateusz Kowalski
– Mateusz Kowalski, Commented Nov 2, 2015 at 20:11
Alright - the link I gave should give a complete list. There might be some HTML specs in the future for custom tag types, though. — Katana314
– Katana314, Commented Nov 2, 2015 at 20:12

Ramanlfc · Accepted Answer · 2015-11-02 20:07:37Z

1

if you want all tags this should do:

document.querySelectorAll("*");

if you want html child tags :

document.querySelector("html").children;

answered Nov 2, 2015 at 20:07

Ramanlfc

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2 Comments

smcd Over a year ago

getElementsByTagName may be faster vs querySelectorAll

Mateusz Kowalski Over a year ago

I did mean if its possible to get all existing tags in HTML Language, not on the page.

Thijs Riezebeek · Accepted Answer · 2015-11-02 20:13:46Z

0

You could write a function that retrieves all the child elements of the <html> element. This would allow you to get all of the html elements on the page.

function getAllChildElements (start) {
    var children = start.childNodes;
    var elements = children;

    for (var i = 0; i < children.length; i++) {
        elements.concat(getAllChildElements(children[i]);
    }

    return elements;
}

var all_elements = getAllChildElements(document.querySelector('html'));

edited Nov 2, 2015 at 20:13

answered Nov 2, 2015 at 20:03

Thijs Riezebeek

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6 Comments

Mateusz Kowalski Over a year ago

i don't wanna get tags of the page, i wanna get all elements that exists in html language.

bool3max Over a year ago

Why would you want to do that? Just give an explanation.

Thijs Riezebeek Over a year ago

Aah my bad. You could have been a bit more specific in your question, tough. I will leave this answer here, just in case anyone is looking to achieve this.

Mateusz Kowalski Over a year ago

@aCodingN00b just need to know, sometimes i don't have connection and i was wondering if its possible.

Thijs Riezebeek Over a year ago

If you're just doing it for yourself, you're better off just downloading a list or something.

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brains_at_work · Accepted Answer · 2015-11-02 20:29:42Z

0

Different approach not accessing the DOM, since I'm still not sure what the aim is: Take the document as a string and look for "<"and ">" with a regular expression? Shall I elaborate on that?

answered Nov 2, 2015 at 20:29

brains_at_work

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3 Comments

Mateusz Kowalski Over a year ago

That's not what i mean. I wanna get all existing and valid(that i can use it) tags in HTML Language, not on the page. The aim is for example if i dont have internet connection and wanna learn some html in the meantime, but i can't access online docs, and I didn't download any.

brains_at_work Over a year ago

You could open the Developer Tools in Chrome and look at everything in the DOM. You can even execute javascript on the console and manipulate them or edit them directly. On Macs it is shortcut alt+cmd+I. Or look through the menu.

brains_at_work Over a year ago

And if you want it offline try a book. :)

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