Fetching an item from Local Storage in Angular 8

Question

Fetching an item from Local Storage in Angular 8

In my local storage, I have some data stored in a unique format. When I try to retrieve the data using localStorage.getItem('id');, it returns undefined. The issue lies in the way the data is stored within localStorage - it's structured as abcabcabc.id. This unique identifier part ("abcabcabc") changes for each user session. Despite this challenge, I need to find a way to extract the value of id. Is there a method to compare strings and isolate only those that contain ".id" for retrieval? If so, could you provide an explanation on how this can be accomplished?

Data stored in localStorage:

abcabcabc.username.id = sdfsdfsdfs
abcabcabc.username.refreshToken = sdfsdfs
abcabcabc.username.accessToken = ertsdffdg

javascript angular typescript local-storage angular8

Answer 1

Answer №1

To retrieve a specific key from localStorage when the exact key is unknown, one can fetch all keys and then loop through them to find the desired key. In the code snippet below, we demonstrate how to extract the value of a key containing 'id' in its name:

// Accessing all key-value pairs stored in local storage
const allKeys = { ...localStorage };

// Looping through each key
for (const keyIndex in allKeys) {

  // Checking if the key contains 'id'
  if (keyIndex.includes('id')) {

    // Retrieving the value for the corresponding key
    console.log(allKeys[keyIndex]);

  }
}

Answer 2

To retrieve a specific key from localStorage when the exact key is unknown, one can fetch all keys and then loop through them to find the desired key. In the code snippet below, we demonstrate how to extract the value of a key containing 'id' in its name:

// Accessing all key-value pairs stored in local storage
const allKeys = { ...localStorage };

// Looping through each key
for (const keyIndex in allKeys) {

  // Checking if the key contains 'id'
  if (keyIndex.includes('id')) {

    // Retrieving the value for the corresponding key
    console.log(allKeys[keyIndex]);

  }
}

Answer 3

Answer №2

When using localStorage, data is stored as key-value pairs. Here's an example:

var id = {key:"id", value:"sdfsdfsdfs"}
//JSON.stringify converts the JavaScript object id into a string 
localStorage.setItem('id', JSON.stringify(id));

To retrieve the data:

var getTheId = localStorage.getItem('id');
//If needed, use JSON.parse()
console.log('getTheId: ', JSON.parse(getTheId));

This is how you typically access the data. However, if you are unsure about how the data was initially set, you can follow these steps instead:

var x = localStorage.getItem(id);
//Parse the data
var st = JSON.parse(x);
var ids = [];
while(st.includes(id)){
//Extracting the specific substring 'abcabacabc'
var newId = st.substring(0,9);
ids.push(newId);
}
console.log(ids);

Answer 4

When using localStorage, data is stored as key-value pairs. Here's an example:

var id = {key:"id", value:"sdfsdfsdfs"}
//JSON.stringify converts the JavaScript object id into a string 
localStorage.setItem('id', JSON.stringify(id));

To retrieve the data:

var getTheId = localStorage.getItem('id');
//If needed, use JSON.parse()
console.log('getTheId: ', JSON.parse(getTheId));

This is how you typically access the data. However, if you are unsure about how the data was initially set, you can follow these steps instead:

var x = localStorage.getItem(id);
//Parse the data
var st = JSON.parse(x);
var ids = [];
while(st.includes(id)){
//Extracting the specific substring 'abcabacabc'
var newId = st.substring(0,9);
ids.push(newId);
}
console.log(ids);

Fetching an item from Local Storage in Angular 8

Answer №1

Answer №2

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