<form> <input type="text" id='username'> <button type="button" id='save' onclick="save()">保存</button> </form> <script> function save(){ var name = document.getElementById('username').value; alert(name); if(name=='hello'){ history.go(-1); } else{ alert('输入错误 hello'); } } </script>
当button放在form表单里的时候,onclick事件就没有响应,不放在form表单里时,save()方法就得到调用了。
请问,这是什么情况呢?是自动提交了表单,而没有响应吗?
回复讨论(解决方案)
函数名称换个
<form> <input type="text" id='username'> <button type="button" id='save' onclick="save1()">保存</button> </form> <script> function save1(){ var name = document.getElementById('username').value; alert(name); if(name=='hello'){ history.go(-1); } else{ alert('输入错误 hello'); } } </script>
真的是啊
不能同名!
<form> <input type="text" id='username'> <button type="button" id='save' onclick="save()">保存</button> </form> <script> function save(){ var name = document.getElementById('username').value; alert(name); if(name=='hello'){ history.go(-1); } else{ alert('输入错误 hello'); } } </script>
当button放在form表单里的时候,onclick事件就没有响应,不放在form表单里时,save()方法就得到调用了。
请问,这是什么情况呢?是自动提交了表单,而没有响应吗?
可是我把button不放在form表单里,就有响应了,这又是为什么呢?
函数名称换个
<form> <input type="text" id='username'> <button type="button" id='save' onclick="save1()">保存</button> </form> <script> function save1(){ var name = document.getElementById('username').value; alert(name); if(name=='hello'){ history.go(-1); } else{ alert('输入错误 hello'); } } </script>
可是我把button不放在form表单里,就有响应了,这又是为什么呢?
在form里save被当成了 onclick="console.log(save);" 把save打印出来看下就知道了
在form里save被当成了 onclick="console.log(save);" 把save打印出来看下就知道了
试了下,确实如此,牛!

HTMLtagsdefinethestructureofawebpage,whileattributesaddfunctionalityanddetails.1)Tagslike,,andoutlinethecontent'splacement.2)Attributessuchassrc,class,andstyleenhancetagsbyspecifyingimagesources,styling,andmore,improvingfunctionalityandappearance.

The future of HTML will develop in a more semantic, functional and modular direction. 1) Semanticization will make the tag describe the content more clearly, improving SEO and barrier-free access. 2) Functionalization will introduce new elements and attributes to meet user needs. 3) Modularity will support component development and improve code reusability.

HTMLattributesarecrucialinwebdevelopmentforcontrollingbehavior,appearance,andfunctionality.Theyenhanceinteractivity,accessibility,andSEO.Forexample,thesrcattributeintagsimpactsSEO,whileonclickintagsaddsinteractivity.Touseattributeseffectively:1)Usese

The alt attribute is an important part of the tag in HTML and is used to provide alternative text for images. 1. When the image cannot be loaded, the text in the alt attribute will be displayed to improve the user experience. 2. Screen readers use the alt attribute to help visually impaired users understand the content of the picture. 3. Search engines index text in the alt attribute to improve the SEO ranking of web pages.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Atom editor mac version download
The most popular open source editor

Dreamweaver CS6
Visual web development tools
