Angular allows you to retrieve values from localStorage

Question

Angular allows you to retrieve values from localStorage

I have been trying to solve this issue by looking at various examples, but haven't been able to figure it out. In my Ionic app, I have a contact form that allows users to contact a listing owner.

After the form submission, I want to store the ad id in local storage to prevent repetitive submissions. I need to store the ad id in a JSON array and then check if it already exists in the session storage before displaying the form.

Currently, I am storing the ad ids in an array, but I am struggling to loop through and check if an id already exists. I attempted to use angular forEach, but the results are coming in as an object.

// Parse any JSON previously stored in allEntries
var existingEntries = JSON.parse(localStorage.getItem("store_owner_ad_contacts"));
if(existingEntries == null) existingEntries = [];

var adId = {
"id":$scope.adId
};
// Save allEntries back to local storage
existingEntries.push(adId);
localStorage.setItem("store_owner_ad_contacts", JSON.stringify(existingEntries));

var values = JSON.parse(localStorage.getItem("store_owner_ad_contacts"));
angular.forEach(values, function(value, key) {

// ^ This is coming as an object how can I get the key value?

if(value == adId){
//form has been submitted before
}else{
// show formVar = true 

console.log(key + ': ' + value);
});

This is how my storage currently looks:

[{"id":"100033"},{"id":"100035"},{"id":"1000336"}]

I am struggling to retrieve the id value from the JSON array (e.g. 1000033). How can I do this?

javascript angularjs ionic-framework

Answer 1

Answer №1

When looping through your data, remember to access object properties using the dot notation or bracket notation: object.yourProperty or object[yourProperty]

var values = JSON.parse(localStorage.getItem("store_owner_ad_contacts"));

values.forEach(values, function(item, i) {

   // Inside the loop, each item is an object like this: {id: "100033"}
   // To access the id property, simply use dot notation

   if (item.id === '100033') {
     // Perform actions here
   }

});

Answer 2

When looping through your data, remember to access object properties using the dot notation or bracket notation: object.yourProperty or object[yourProperty]

var values = JSON.parse(localStorage.getItem("store_owner_ad_contacts"));

values.forEach(values, function(item, i) {

   // Inside the loop, each item is an object like this: {id: "100033"}
   // To access the id property, simply use dot notation

   if (item.id === '100033') {
     // Perform actions here
   }

});

Answer 3

Answer №2

// This code snippet demonstrates how to access keys within a forEach loop.
var index = 0;
for(index in data) {
     // Access the key using the 'index' variable.
}

Answer 4

// This code snippet demonstrates how to access keys within a forEach loop.
var index = 0;
for(index in data) {
     // Access the key using the 'index' variable.
}

Answer 5

Answer №3

It seems that the issue at hand is not directly related to Angular itself (simply using it within an Angular framework isn't the issue). If you have an array of values and need to search for a specific item, you can utilize Array.prototype.find. If your data is in the form of a stringified array, make sure to parse it using JSON.parse.

When working with localStorage in an Angular application, it is advisable to use ngStorage as it provides functions for stringifying, parsing, and additional options.

var lsItems = [{"id":"100033"},{"id":"100035"},{"id":"1000336"}];

var item = lsItems.find(i => i.id === "100035");
console.log(item)

Answer 6

It seems that the issue at hand is not directly related to Angular itself (simply using it within an Angular framework isn't the issue). If you have an array of values and need to search for a specific item, you can utilize Array.prototype.find. If your data is in the form of a stringified array, make sure to parse it using JSON.parse.

When working with localStorage in an Angular application, it is advisable to use ngStorage as it provides functions for stringifying, parsing, and additional options.

var lsItems = [{"id":"100033"},{"id":"100035"},{"id":"1000336"}];

var item = lsItems.find(i => i.id === "100035");
console.log(item)

Angular allows you to retrieve values from localStorage

Answer №1

Answer №2

Answer №3

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