function validateForm() {
axios.get(url1, {params: {userName: userName}}).then(req => {
console.log("user"+req.data)
repeatUserName = req.data
console.log("user"+repeatUserName)
if (!repeatUserName) {
alert("用户名已存在");
① return false;
}
})
}①处return怎么可以跳出外边validateForm函数
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