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html5 validation for symfony 2.1

Is it true that only HTML5 can directly use client-side validation? What I mean is, if I don’t use the html5 validation control and I don’t use html5, am I unable to perform client-side validation?

迷茫 2017-05-16 16:45:35

The difference between HTML and HTML5

What is the difference between HTML and HTML5? After learning HTML5, does it mean I don’t need to learn HTML anymore?

长江 2018-08-22 23:38:55

Can I use html5 to create an image scrolling effect?

Can I use html5 to create an image scrolling effect?

。 2018-01-31 16:19:16

html5 show hide

How to click on a list item in html5 and display the question below the item? Click on the question and display the answer below the question? Click the question again to hide the answer.

扔个三星炸死你 2017-06-28 09:22:14

Can PDF files run HTML5 and Javascript?

I have a stupid idea to try and make a program that won't be blocked on any computer since it will be embedded in a PDF (I heard Javascript can run in PDFs). It will run HTML5 and Javascript (and a little bit of CSS) in PDF files, mainly using the canvas element in HTML5 and WebGL in Javascript. Is ...

P粉113938880 2024-04-05 12:57:00

Regarding the use of html5

The new features of html5 are very good, but many browsers do not support it well, mainly IE. So is it used much, and in what scenarios is it mainly used?

扔个三星炸死你 2017-06-30 09:57:47

html5 form validation

How are the native verification boxes in HTML5, such as required, pattern, etc., implemented when the verification is invalid? Why does a prompt box with different content pop up when it is invalid because different constraints are not met? Is it implemented by combining the invalid event and the va...

天蓬老师 2017-07-06 10:35:42

I would like to ask how to write HTML5 in PHP

I'm a newbie, I don't know how to start writing HTML5 in php. Are there any videos I can watch? ................................................................. ............

幼稚. 2021-12-20 22:02:31

javascript - HTML5 drag and drop does not work on the pad, how to solve it

HTML5 drag and drop cannot be used on the pad and the dragStart event cannot be triggered.

滿天的星座 2017-06-29 10:10:07

How to use HTML5 to insert flv format video on mobile phone

I want to use flv format video as background playback on the login page of software developed with HTML5. I would like to ask how to achieve it. I checked a lot of posts saying that HTML5 does not support videos in flv format, but it cannot use MP4 format because the video must be placed in the loca...

大家讲道理 2017-05-31 10:40:56

Why localStorage and sessionStorage belong to the category of html5, but why is it supported by IE8?

Why localStorage and sessionStorage belong to the category of html5, but why is it supported by IE8?

怪我咯 2017-05-16 13:34:19

HTML5 video M3U8 encoded with Base64

I want to add a base64 encoded M3U8 file in the Video tag of HTML5, how can I do it<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><metaname="viewport"content ="width=devic

P粉269530053 2023-09-09 23:07:18

How to get the playback duration of HTML5 audio

I have an html5 <audio> tag in the page, but how do I know its duration? <audiocontrols=""><sourcesrc="p4.2.mp3"></audio>

P粉545218185 2023-08-22 21:19:42

Using vue-router in laravel, how to use html5 history

When using vue-router in laravel, how to use html5 history? If in new VueRouter({mode:'history',...});, there will be no 127.0.0.1/#/article in the URL, and such # will appear. , the route was not found. . Waiting online. . . .

给我你的怀抱 2017-05-16 16:46:44

javascript - HTML5 initial pop-up keypad

Please tell me. When the page first comes in, let the small keyboard that comes with the HTML5 page pop up. PS: There is input in the page! ps: Don’t tell me what focus to get. I’ve tried it all but it doesn’t seem to work. It doesn’t work on Android or Apple. Unless you click on it. . .

PHP中文网 2017-06-15 09:22:43

What is the difference between enctype and formenctype in HTML5?

I'm just wondering what's the difference between the attributes enctype and formenctype in HTMLLivingStandard (aka the new HTML5 spec)? I've been reading the HTML Standard for Developers but still can't seem to see any real difference between the two.

P粉190883225 2024-04-02 11:47:56

html5 - WeChat browser video playback fails

Using WeChat web developer tools to develop WeChat pages works normally, as shown below: Then switch to the WeChat browser on the phone for debugging, and find that the video cannot be played. What is going on? The following is the video playback code, which uses pure HTML5 to play. The WeChat web d...

仅有的幸福 2017-05-24 11:36:13

What's the difference with html5 data-* custom attributes.

<li data-animal="fish">Salmon</li> and <li animal="fish">Salmon</li> What are the differences between the new html5 custom attributes and ordinary defined attributes? is a defining attribute.

曾经蜡笔没有小新 2017-07-05 09:55:59

How to open QQ and map through html5 page

How to open QQ and map through html5 page QQ: I found the method below, but there is no response after clicking. {Code...} Map: I found the method below. The question is why is the address fixed after opening it? Which attribute is fixed position? How to achieve positioning? {code...}

伊谢尔伦 2017-07-06 10:34:19

Does HTML5 allow non-empty self-closing tags?

The W3C validator (Wikipedia) does not like the use of self-closing tags (tags ending in "/>") on non-empty elements. (Empty elements are those that never contain any content.) Are they still valid in HTML5? Some examples of accepted empty elements:<br/><imgsrc=...

P粉680487967 2023-08-21 18:20:11