http://localhost:90/pages/administrator/brand/update.jsp
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JavaScript 总结
tips 判l断输入值不为空格 let username = $(”).val().trim() //去掉前后空格if(username.length == 0 || usern…
tips 判l断输入值不为空格 let username = $(”).val().trim() //去掉前后空格if(username.length == 0 || usern…