在“div”上撰写文字使用JavaScript [英] Writing text on "div" using JavaScript
本文介绍了在“div”上撰写文字使用JavaScript的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
< p>< p>< p>< ; HTML>
< body>
< div id =comments>
< / div>
< form name =forma>
< textarea name =commentUserid =commentUsercols =40rows =5>
此处评论...
< / textarea>< br>
< input type =submitvalue =Ready！ onClick =writeComment（）/>
< / form>
< script type =text / javascript>
函数writeComment（）
{
var comment = document.forma.commentUser.value;
alert（评论）;
document.getElementById（'comments'）。innerHTML = comment;
}
< / script>
< / body>
< / html>
它可以正确地做到这一点，但它只会切换回文本框，评论我只写了消失。任何关于这里发生了什么的想法？
非常感谢您的宝贵时间。
解决方案
快速修正：
< input type =submitvalue =Ready！ onClick =writeComment（）/>
至
< input type =buttonvalue =Ready！ onClick =writeComment（）/>
另外，您可以阻止输入的默认操作。基本上告诉浏览器您将使用 preventDefault 处理该操作：
函数writeComment（e）{
var comment = document.forma.commentUser.value;
alert（评论）;
document.getElementById（'comments'）。innerHTML = comment;
e.preventDefault（）;
返回false;
}
I'm having some trouble whenever I want to add some text to my div tag, here's my code:
<html>
<body>
<div id="comments">
</div>
<form name="forma">
<textarea name="commentUser" id="commentUser" cols="40" rows="5">
Comments here...
</textarea><br>
<input type="submit" value="Ready!" onClick="writeComment()" />
</form>
<script type="text/javascript" >
function writeComment()
{
var comment = document.forma.commentUser.value;
alert(comment);
document.getElementById('comments').innerHTML=comment;
}
</script>
</body>
</html>
It does what it has to do correctly, but then it switches back to the text box only and the comment I just wrote disappears. Any idea of what's going on here?
Thank you so much for your time.
解决方案
It is because you are submitting the form.
Quick fix:
<input type="submit" value="Ready!" onClick="writeComment()" />
to
<input type="button" value="Ready!" onClick="writeComment()" />
In addition, you are able to prevent the default action of an input. Basically telling the browser the you are going to handle the action with preventDefault:
function writeComment(e) {
var comment = document.forma.commentUser.value;
alert(comment);
document.getElementById('comments').innerHTML = comment;
e.preventDefault();
return false;
}
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