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snippets.js

javascript:(function(){

  //The getInput function is defined to prompt the user for input.
  function getInput(text){return prompt(text)}
  
  //the localStorage will be used to store & retrieve keys and values.
  d = localStorage;

  //The user is prompted to enter either "get" or "set" to choose the action.
  a = getInput('Enter "get" or "set": ');

  //If the user chooses "get," they are prompted to enter a key. 
  if (a == "get") {
    k = d.length ? [...Array(d.length)].map(i => d.key(i)).filter(key => key.startsWith('z_')) : []; // Filter keys with "z_" prefix
    key = getInput("Keys: " + k + "\nEnter key:");
    
    //If the key exists, the corresponding value is inserted into the textarea with the ID "prompt-textarea". 
    if (d.getItem(key)) document.getElementById("prompt-textarea").value = d.getItem(key);
    
    //If not, an alert is displayed indicating that the key does not exist.
    else alert("Key does not exist!");
  } 
  //If the user chooses "set," they are prompted to enter a new key and a value, and this key-value pair is stored in the local storage.
  else if (a == "set") {
    key = "z_" + getInput("Enter new key: "); // Add "z_" prefix automatically to identify our custom keys
    value = getInput("Enter value to store:");
    
    //key-value pair is stored in localStorage.
    d.setItem(key, value);
  } else {
    alert("Invalid action");
  }

})()