Javascript - window.location.assign 不工作 [英] Javascript - window.location.assign not working
问题描述
我有一个项目，我扫描 QR 码，然后它会根据扫描的代码自动打印信息.
I've a project where I scan a QR code, and it will then automatically print out information based on which code was scanned.
我有扫描仪和打印机.每个二维码对应一个网址.我可以让扫描仪填充输入字段，并且我可以收到警报以显示已扫描的信息.但是，每当我尝试分配 URL 时，它只是将信息附加到当前 URL，而不是替换它.
I have the scanner, and a printer. Each QR code is to correspond to a URL. I can get the scanner to fill an input field, and I can get an alert to show the information that was scanned. However, whenever I try to assign the URL it simply appends the information to the current URL, instead of replacing it.
我需要它来替换当前的 URL.有谁知道它为什么这样做，以及如何解决它?
I need it to replace the current URL. Does anyone know why it is doing this, and how to fix it?
<html>
<head><title>QR Printing</title></head>
<body onload="document.myform.mytextfield.focus();">
<form name="myform">
<input type="text" name="mytextfield" onchange="checkForm()">
</form>
<script type="text/javascript" language="JavaScript">
function checkForm() {
var field1 = document.forms['myform'].elements['mytextfield'].value;
alert(field1);
window.location.assign(field1);
}
</script>
</body>
</html>
推荐答案
看起来表单正在提交.取消它.
Looks like the form is submitting. Cancel it.
<form name="myform" onsubmit="return false">
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