版权声明：学习交流。。 https://blog.csdn.net/qq_38881495/article/details/83718310
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>清除输入框内的空格</title>
</head>
<body>
<input type="text" onBlur="removeSpacing(this)" />
<script type="text/javascript">
function removeSpacing(obj) {
obj.value = obj.value.replace(/\s/gi, '')
}
</script>
</body>
</html>