Most voted "html" questions
Use this tag when the question refers to some resource, information or problem related exclusively to the HTML language (Hypertext Markup Language). HTML is the main markup language used to structure web pages and format content. The latest revision of the HTML specification is HTML5.
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15
votes6
answers3343
viewsMethods to test websites in different browsers?
I would like to know methods to test sites in different browsers, without creating virtual machines.
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votes3
answers973
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votes6
answers90846
viewsDo I use PHP inside an HTML or an HTML inside a PHP?
I made all my site in HTML and CSS, but now I need to use PHP to send some data to a database. I’m just wondering if I modify all my documents to . php or if I use PHP inside HTML (if possible).…
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15
votes4
answers31096
viewsWriting and reading file via Javascript
It is possible (if, how) to do the following method with Javascript? The person type in a form some arguments, by clicking submit it will run a Javascript code, in this code the function will take…
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15
votes3
answers26168
viewsWhat is meta charset in HTML?
Can someone explain me this HTML5 code? <meta charset="utf-8"> What is this standard used for and why?
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15
votes1
answer166
viewsWhy does HTML accept color with random names/strings in the <body> tag?
Some time ago I read somewhere about it, but I never understood how it works: Take the example with the word 'chucknorris': jsfiddle Not only with the word 'chucknorris' but any random word always…
htmlasked 11 years, 1 month ago Franchesco 5,144 -
15
votes6
answers21826
viewsHow to remove auto-fill inputs?
I have my email input/password. But always when typing an email that I have already saved login/password, the browser automatically fills in my form. How to solve?
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15
votes1
answer105429
viewsInsert line break (enter) using HTML codes
I’m trying to enter/break a line (\n, <br />, etc) in a title an html element. To do so, I searched for HTML Codes something that was equivalent to   used to give a "space". I found…
htmlasked 11 years, 1 month ago CesarMiguel 4,800 -
15
votes2
answers2517
viewsWhat are Web Components?
What are web components and how to use this technology ? I would like to understand a little more about this technology and visualize an example with its use.
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15
votes1
answer222
viewsCan displaying many elements in the DOM impair performance?
I really like using libraries like Vue and AngularJs and my favorite implementation was to Infinite Scroll (or loading on demand). I mean, I initially upload 15 records via ajax. If the user scrolls…
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15
votes2
answers1586
viewsIs it good practice to have all sizes of favicons, and include all rel links in HTML?
I’ve always used only the favicon.ico on the pages HTML, with it at the root and with its link rel in the HEAD: <link rel='shortcut icon' href='https://site/favicon.ico'> But recently,…
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14
votes2
answers1611
viewsHow to obtain form data via "POST"?
Is there any way to receive data from an external form using the method="post" on my jsf page? I can already do that when the data traffic via GET. <f:metadata> <f:viewParam name="dados"…
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14
votes2
answers8665
viewsHow to clone an element in Javascript?
Is it possible to obtain an exact clone of a given HTML element? so that the clone contains all properties exactly the same? If there is, I would like to know how to proceed to perform this clone,…
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14
votes5
answers16269
viewsHow to enable a button only when all inputs are completed?
I have a <button> which is rendered as disabled(disabled) when page is initially loaded. I’d like him to stay enabled(authorised) when all data are completed in <input>'s. How could I do…
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14
votes1
answer23562
viewsShow GIF while page loads
I need a GIF to stay working while the page loads. I’ve tried a few ways but none worked. And when the page loads, the Completed!. More or less as it happens on this website.…
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14
votes3
answers333
viewsIs there any advantage in bringing together all the icons of a website in a single image?
I see on most large websites that the icons used are grouped in only one image, which leads to the download of only one file by the user. Is there some benefit in speed gains or is it just a matter…
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14
votes4
answers1112
viewsIs there an XHTML5 (XHTML + HTML5)?
XHTML is HTML with strict syntax (must be a valid XML). I can use it in conjunction with HTML5?
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14
votes1
answer1274
viewsSelect Multiple with dynamic operation
I have a select with 4 options. These 4 options are the number of options that will appear in a multiple select. What I want is as soon as the user selects the option of number of frequently asked…
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14
votes3
answers596
viewsWhat is the difference between DOM event handlers?
I would like to know the difference between, for example, <p onclick="fn()">click</p>, addEventListener('click', fn()); and document.getElementById().onclick = fn();. Is there any…
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14
votes1
answer1507
viewsFocus, when starting the page
How best to get an element to focus as soon as the page loads
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14
votes6
answers29816
viewsHow to create space before or at the end of the text contained between html tags?
I need to put a space before a text that is found between tags html, what is the right way to do ? No css... div{float:left;} <div>Texto 1</div><div> texto que quero um espaço…
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14
votes4
answers14426
viewsWhat is the difference between "margin: 0 auto;" and "margin: auto;"?
As the title already says: What exactly is the difference between margin: 0 auto; and margin: auto;? margin: 0 auto; margin: auto; Why can you only use 0? What would be the unit of that 0? px? %?…
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14
votes4
answers994
viewsWhy does Input Type Email validation accept pointless domains?
The input type[email] is intended to validate whether the field is being filled with a valid email. But several times I have gone through questioning in some projects about why this field accept…
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14
votes2
answers1129
viewsWhat is the purpose and how to use the "display: Contents" of the CSS?
I recently saw that there is a new kind of display in the CSS the display: contents, but I didn’t quite understand the intention of using it? https://developer.mozilla.org/en-US/docs/Web/CSS/display…
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13
votes1
answer865
viewsHow do I increase the brightness of an element with Javascript/jQuery?
On my page I have several elements with different background colors. I wonder how I could do to when clicking a button increase the brightness of the color, make it lighter. It is possible to do…
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13
votes3
answers14931
viewsHow to style <select> tag
How do I style the tag select, like that arrow at the end of the field. The pseudo-classes :hover, :focus, work with this element?
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13
votes5
answers3441
viewsShow text when typing in textarea
Consider the following example: I have a textarea that, when the user enters something on it, a small text just below should be displayed, and at a certain time after the user has finished typing…
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13
votes1
answer233
viewsHow to calculate the dimensions of an SVG element
How to calculate the dimensions of an element svg consistently across browsers? In fact the only one not to respond consistently is Firefox. It would be interesting to understand the reason for the…
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13
votes2
answers1173
viewsIs it safe to minify HTML?
Like JS and CSS, HTML can also be "minified": <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge">…
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13
votes5
answers16703
viewsFill left zeros in Javascript
I need to insert zeros left into a field input text. Whereas this field might even be 5 characters + one check digit That is, I need Javascript to fill in zeros to the left according to what the…
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13
votes2
answers1498
viewsUsing Object or Iframe to import other sites to my site
I was needing to import several random pages from other sites to my site. Wikipedia, for example. I saw that I can use either Iframe (this worked) or Object (does not show content). Then, I would…
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13
votes3
answers2891
viewsWhat is the need to maintain a`name` attribute in a`HTML`tag?
What is the need to maintain an attribute name on a tag HTML? its characteristics are equal to those of the attribute id that still has other utilities like being the key of the arrays $_POST and…
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13
votes1
answer10939
viewsWhat is parse, and how the parse of DOM works in HTML5
I started to study more CSS3 in depth, and I ended up wanting to better understand how the HTML rendering works in the Document Object Model (DOM), and how this HTML and CSS (and JS) markup is made…
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13
votes1
answer16196
viewsDifference between keyup(), keydown() and keypress()
I’d like to know the difference between keyup(), keydown() and keypress(), in my opinion I think they do the same thing, but what is the purpose of each? Performance improvement for each type?…
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13
votes2
answers133
viewsget original HTML entities with javascript
I need all the original HTML entities of a paragraph, mainly the accents, the methods I know only recover some entities, as the example below where ">" is correctly coded but "ç" does not. It is…
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13
votes2
answers127257
viewsPut a background image and make it responsive
I’m having a problem putting a background image on my page. I did some tests and it looks like this when I change the window size: When I maximize it’s right: How can I adjust this image to get the…
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13
votes4
answers31386
viewsSending email via Phpmailer to Gmail
I can’t at all send an email to my Gmail account via PHP. I had a previous project where I tried to use phpmailer and I can’t get it to work properly (2 months trying). Now I finished a website and…
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13
votes1
answer2046
viewsWhat is the purpose of the "Return true;" command at the end of a function?
I noticed that in many functions in javascript I see at the end a return true. function EscreveDados(){ document.getElementById("divData").value = 'texto'; return true; } and in HTML we have the tag…
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13
votes2
answers1166
viewsIs it acceptable to use <H2>, <H3>, <p>, <div> tags within links/anchors (<a></a>)?
It is acceptable in question SEO and semantics to use tags like <h2>, <h3>, <p> and <div> inside <a href=""></a>? I noticed that to make items on a page people…
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13
votes3
answers4045
viewsHow to add <li> dynamically in <ul> with jQuery?
I’m bringing back notifications and need to dynamically add the path to them, how do I add a <li> to each element of the response? Javascript $(document).ready(function () { $.ajax({ url:…
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13
votes3
answers849
viewsHow to make a flex container have the width of internal Ivs?
Good afternoon, I’m creating a layout with height:100% where I have 2 groups, and within each group I line up the DIVs vertically and if any DIV did not fit in the height maximum or there is resize…
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13
votes3
answers890
viewsIs it wrong to use more than one <thead>, <tbody> or <tfoot> in a table?
I have a table that gets a certain formatting when the elements have a tbody. Because of this formatting, I thought to use the tbody twice on the same table, but I wondered if this would be valid.…
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13
votes3
answers512
viewsWhat is the difference between the <del> and <s> tag?
I saw about the tags <del> and <s>, say that one is to be used in texts/phrases not relevant and another to "delete" part of the text, but when using both tags the effect is the same (a…
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13
votes2
answers457
viewsUse "left: -9999px" instead of "display: None"? But why?
I started to wonder about that a little while ago. I read in some article, which I don’t remember what it is, that for "visibility" sake instead of using display: none or visibility: hidden should…
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13
votes1
answer996
viewsWhat is the allow attribute in iframes and how to use it?
According to the website of MDN Web Docs the attribute allow serves to Specifies a Feature policy for the <iframe>. Translated Specifies a resource policy for <iframe>. Source This…
htmlasked 5 years, 12 months ago user168020 -
12
votes1
answer1368
viewsHow to detect that the div was rolled to the end?
I need to know if a certain div was rolled to the end, using jQuery. I’m having problems because the height of the div is not constant. The goal is that the automatic scrolling of the div does not…
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12
votes2
answers5931
viewsHow to hide a visible sub-menu by clicking on another JS menu?
I have the script below to use in a menu. It changes the visibility of a specific element by its ID. Clicking on a main menu opens a submenu. Is there any way to change the script so that when…
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12
votes2
answers9742
viewsDynamically adding element with jQuery
I have assembled the following structure in HTML: <form name="criaModelo" method='post' action=''> <label for="name"> <strong>Nome:</strong> <input name="nomeModelo"…
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12
votes6
answers8117
viewsHow to remove a "href" from a <a> tag with Jquery/Javascript?
I have a tag <a> with hyperlink properly set. However, I would like to remove it when firing from an event. The same tag has a properly set ID, too (unique, valid, and related). I wonder if…
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12
votes3
answers1676
viewsHow to set a max-width to a div that increases and decreases proportionally?
My div which increases or decreases proportionally is with style: padding-bottom: 75%; Look at this example: Jsfiddle What I want is that the div that grows proportionately lock the size, when you…