我可以從函式中取出'a = entry.username'的值嗎？我想獲得已經在函式內部回圈的值
$('#btnlogin').click(function(){
var usernamelogin = $('#usernamelogin').val()
var passwordlogin = $('#passwordlogin').val()
var data_user1 = JSON.parse(localStorage.getItem('data_user'))
for(var i in data_user1){
var entry = data_user1[i]
if(usernamelogin == entry.username && passwordlogin == entry.password){
window.location.href = "curhat.jsp"
a = entry.username
return
}
}
if(usernamelogin != entry.username && passwordlogin != entry.password){
alert("wrong username or password")
}
//console.log(data_user1)
//console.log('username = ' entry.username)
})
uj5u.com熱心網友回復：
只需a在輸入函式之前宣告一下，以便以后可以使用它，如下所示：
let a;
$('#btnlogin').click(function(){
var usernamelogin = $('#usernamelogin').val()
var passwordlogin = $('#passwordlogin').val()
var data_user1 = JSON.parse(localStorage.getItem('data_user'))
for(var i in data_user1){
var entry = data_user1[i]
if(usernamelogin == entry.username && passwordlogin == entry.password){
window.location.href = "curhat.jsp"
a = entry.username
return
}
}
if(usernamelogin != entry.username && passwordlogin != entry.password){
alert("wrong username or password")
}
//console.log(data_user1)
//console.log('username = ' entry.username)
})
//check if a is not null and do something with it
if(a){
//do something with a here out of the function
}
如果您希望跨頁面傳遞 a，您可以使用 localStorage 或 sessionStorage 如下所示來存盤 a 的值：
a = entry.username;
localStorage.setItem("a",JSON.stringify(a))
然后稍后使用在另一個頁面中檢索它
const val = JSON.parse(localStorage.getItem("a"))
轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/493647.html
標籤：javascript jQuery