警报后重置输入值 - Javascript
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Reset input value after alert - Javascript
提问by Lodder
I have a simple input box where if the number is higher than 2, a popup message will appear.
我有一个简单的输入框，如果数字大于 2，则会出现一个弹出消息。
Here is the code I am using, however I already have an onkeyupcommand on the input for something else, so I hope that won't be a problem
这是我正在使用的代码，但是我已经onkeyup在输入上有了其他命令，所以我希望这不会成为问题
HTML:
HTML：
<input id="jj_input23" type="text" value='' onkeyup='changeTransform()' />
Javascript:
Javascript：
if(jj_input23 > 2) {
alert("Making the scale higher than 2 will make the preview too big");
document.getElementById('jj_input23').value("");
}
After the aler message has been displayed, and the user has clicked "Ok", I want the input text to reset. How can I do this?
显示警报消息并且用户单击“确定”后，我希望重置输入文本。我怎样才能做到这一点？
Thanks in advance
提前致谢
回答by Zoltan Toth
if(jj_input23 > 2) {
alert("Making the scale higher than 2 will make the preview too big");
document.getElementById('jj_input23').value = "";
}
If you're using jQuery then you almost got it:
如果您使用的是 jQuery，那么您几乎就明白了：
$('#jj_input23').val("");
回答by SLaks
.valueis a property, not a function.
.value是一个属性，而不是一个函数。
You want .value = "";.
你要 .value = "";。
