输入框的长度校验
username:hello
varinput=$('#test-input')
input.on('change',function(){varvall=$(this).val()if(vall.length>10){
alert('too long!')
}else if(vall.length<3){
alert('too short!!')
}
})
输入框的长度校验
username:hello
varinput=$('#test-input')
input.on('change',function(){varvall=$(this).val()if(vall.length>10){
alert('too long!')
}else if(vall.length<3){
alert('too short!!')
}
})