index.ts

#! /usr/bin/env node
import inquirer from "inquirer";

let todos:string[] = []
let condition = true;
console.log("Welcome to the todo list app");

    while(condition){
    let operation = await inquirer.prompt({
        type:"list",
        name:"operator",
        message:"What operation you want to perform?",
        choices:["Add","View","Update","Delete"]
    })

    if(operation.operator === "Add"){
        let add = await inquirer.prompt({
            type:"input",
            name:"additems",
            message:"What thing you want to add in your todo list?"
        })
        todos.push(add.additems)
        console.log(todos)
    }

    if(operation.operator === "View"){
        console.log(todos)
    }

    if(operation.operator === "Update"){
        let update = await inquirer.prompt({
            type:"list",
            name:"updateitems",
            message:"What thing you want to update in your todo list?",
            choices:todos
        })
        let update2 = await inquirer.prompt({
            type:"input",
            name:"updateitems2",
            message:"Update Items"
        })   
    let newtodos =  todos.filter(value => value != update.updateitems)
    todos = [...newtodos,update2.updateitems2]
    }

    if(operation.operator === "Delete"){
        let remove = await inquirer.prompt({
        type:"list",
        name:"removeitems",
        message:"Select what items you want to delete from your list?",
        choices:todos.map(item => item)
        })
        let newtodos = todos.filter(value => value != remove.removeitems)
        todos = [...newtodos]
        console.log(todos)
    }
    let task = await inquirer.prompt({
        name:"moretask",
        type:"confirm",
        message:"Do you want to add more thing in your todo list?",
        default:"false"
    })
    condition = task.moretask 
}
console.log("Your Todos: ",todos)