javascript 使用 chrome.storage.local 存储数组
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Store an array with chrome.storage.local
提问by little-dude
I'm writing a chrome extension, and I can't store an array. I read that I should use JSON stringify/parse to achieve this, but I have an error using it.
我正在编写 chrome 扩展程序，但无法存储数组。我读到我应该使用 JSON stringify/parse 来实现这一点，但是我在使用它时出错。
chrome.storage.local.get(null, function(userKeyIds){
if(userKeyIds===null){
userKeyIds = [];
}
var userKeyIdsArray = JSON.parse(userKeyIds);
// Here I have an Uncaught SyntaxError: Unexpected token o
userKeyIdsArray.push({keyPairId: keyPairId,HasBeenUploadedYet: false});
chrome.storage.local.set(JSON.stringify(userKeyIdsArray),function(){
if(chrome.runtime.lastError){
console.log("An error occured : "+chrome.runtime.lastError);
}
else{
chrome.storage.local.get(null, function(userKeyIds){
console.log(userKeyIds)});
}
});
});
How could I store an array of objects like {keyPairId: keyPairId,HasBeenUploadedYet: false} ?
我如何存储像 {keyPairId: keyPairId,HasBeenUploadedYet: false} 这样的对象数组？
回答by gblazex
I think you've mistaken localStoragefor the new Chrome Storage API.
- You needed JSON strings in case of the localStorage
- You can store objects/arrays directlywith the newStorage API
我想你误认为localStorage是新的 Chrome Storage API。
- 您需要 JSON 字符串以防万一localStorage
- 您可以直接使用新的对象/数组存储对象/数组Storage API
// by passing an object you can define default values e.g.: []
chrome.storage.local.get({userKeyIds: []}, function (result) {
// the input argument is ALWAYS an object containing the queried keys
// so we select the key we need
var userKeyIds = result.userKeyIds;
userKeyIds.push({keyPairId: keyPairId, HasBeenUploadedYet: false});
// set the new array value to the same key
chrome.storage.local.set({userKeyIds: userKeyIds}, function () {
// you can use strings instead of objects
// if you don't want to define default values
chrome.storage.local.get('userKeyIds', function (result) {
console.log(result.userKeyIds)
});
});
});
