为什么我的按钮在单击时调用 function 使我的页面重新加载
[英]Why is my button that calls a function on click making my page reload
问题描述
I am working on a form that uses javascript to create a paragraph.
我正在使用 javascript 创建段落的表单。 For some reason, when I click my button, it forces my page to reload.出于某种原因，当我单击按钮时，它会强制我的页面重新加载。 Could you anyone let me know what I'm doing wrong here?谁能让我知道我在这里做错了什么？
console.log('everything is linked') function createParagraph() { console.log('function called'); var wordOne=document.getElementById('textOne').value var wordTwo=document.getElementById('testTwo').value var paragraph = '<p>My first word is' + wordOne+'. My Second word is '+ wordTwo+'.</p>'; document.getElementById('answer').innerHTML= paragraph }
<body> <form action=""> <input id='textOne' type="text"> <input id='textTwo' type="text"> <button onclick="createParagraph()">Click Me</button> </form> <div id="answer"></div> <script src="app.js"></script> </body>
3 个解决方案
解决方案1
1 2020-07-09 13:00:04
The default behavior of a <button> inside a <form> is to submit that form. <form>中的<button>的默认行为是提交该表单。 Set the button's type to explicitly not be a "submit":将按钮的type设置为明确不是“提交”：
<button type="button" onclick="createParagraph()">Click Me</button>
Additionally, if you have no use for the actual <form> (don't want to submit it) then it's probably best to just remove it:此外，如果您对实际的<form>没有用处（不想提交它），那么最好将其删除：
<body>
<input id='textOne' type="text">
<input id='textTwo' type="text">
<button type="button" onclick="createParagraph()">Click Me</button>
<div id="answer"></div>
<script src="app.js"></script>
</body>
That way there's nothing to accidentally be submitted in the first place.这样一开始就不会意外提交任何内容。
解决方案2
1 2020-07-09 13:00:14
Your button acts as a submit button, so your form is being submitted.您的按钮充当提交按钮，因此您的表单正在提交。 To prevent this, you can use attribute onSubmit on your form and prevent sending form.为了防止这种情况，您可以在表单上使用属性 onSubmit 并阻止发送表单。
<form onSubmit="return false">
解决方案3
0 2020-07-09 13:03:03
Because the button is in a form and the form is probably submitted.因为按钮在表单中，并且表单可能已提交。
add the type="button" to not submit the form.添加type="button"以不提交表单。
console.log('everything is linked') function createParagraph() { console.log('function called'); var wordOne=document.getElementById('textOne').value var wordTwo=document.getElementById('testTwo').value var paragraph = '<p>My first word is' + wordOne+'. My Second word is '+ wordTwo+'.</p>'; document.getElementById('answer').innerHTML= paragraph }
<body> <form action=""> <input id='textOne' type="text"> <input id='textTwo' type="text"> <button type="button" onclick="createParagraph()">Click Me</button> </form> <div id="answer"></div> <script src="app.js"></script> </body>
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