我正在尝试实现一个收藏夹列表,该列表获取用户正在查看的当前游戏的ID。到目前为止,我有这个:
$('#favouriteBtn').click(function(){
currentAddFav();
});
function currentAddFav(){
if(localStorage.getItem('favourites')){//If there are favourites
var storage = JSON.parse(localStorage['favourites']);
for (var i = 0;i <= storage.length;i++){
if(storage[i] == currentGame.id){//Id already stored, we dont want a duplicate id so ignore
console.log('id already stored');
break;
}
else{//game id doesn't exist in storage so add the id to storage
storage.push(currentGame.id);
localStorage.setItem('favourites', JSON.stringify(storage));
console.log('must be a new id?');
}
}
}else{//No favourites in local storage, so add new
var favArray= [];
favArray.push(currentGame.id);
localStorage.setItem("favourites", JSON.stringify(favArray));
console.log('New favourites list');
}
}
如果我尝试添加新的收藏夹,它会起作用,如果我尝试添加首次添加到列表中的相同收藏夹,它可以正常工作。然后,如果我尝试添加与首次添加的不同的收藏夹,则本地存储中的数组允许我继续向其添加新的ID。
答案 0 :(得分:1)
你的循环错误
for (var i = 0;i <= storage.length;i++){
对存储中的每个项执行if或else的情况。你想要的是:
if (storage.indexOf(currentGame.id) == -1) {
# not found
storage.push(currentGame.id);
localStorage.setItem('favourites', JSON.stringify(storage));
} else {
# found
console.log('item already in favorites')
}