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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>IndexedDB demo</title>
</head>
<body>
DB<input type = 'text' value = 'notes' id = 'txtDB'>
Version <input type = 'text' value = '1' id = 'txtVersion'>
<button id = 'btnCreateDB'>Create DB</button>
<button id = 'btnAddNote'>Add Note</button>
<button id = 'btnViewNotes'>View Notes</button>
<script>
let db = null
const btnCreateDB = document.getElementById("btnCreateDB")
const btnAddNote = document.getElementById("btnAddNote")
const btnViewNotes = document.getElementById("btnViewNotes")
btnCreateDB.addEventListener("click", createDB)
btnAddNote.addEventListener("click", addNote)
btnViewNotes.addEventListener("click", viewNotes)
function viewNotes() {
const tx = db.transaction("personal_notes","readonly")
const pNotes = tx.objectStore("personal_notes")
const request = pNotes.openCursor()
request.onsuccess = e => {
const cursor = e.target.result
if (cursor) {
alert(`Title: ${cursor.key} Text: ${cursor.value.text} `)
//do something with the cursor
cursor.continue()
}
}
}
function addNote() {
const note = {
title: "note" + Math.random(),
text: "This is my note"
}
const tx = db.transaction("personal_notes", "readwrite")
tx.onerror = e => alert( ` Error! ${e.target.error} `)
const pNotes = tx.objectStore("personal_notes")
pNotes.add(note)
}
function createDB () {
const dbName = document.getElementById("txtDB").value
const dbVersion = document.getElementById("txtVersion").value
const request = indexedDB.open(dbName,dbVersion)
//on upgrade needed
request.onupgradeneeded = e => {
db = e.target.result
/* note = {
title: "note1",
text: "this is a note"
}*/
const pNotes = db.createObjectStore("personal_notes", {keyPath: "title"})
const todoNotes = db.createObjectStore("todo_notes", {keyPath: "title"})
alert(`upgrade is called database name: ${db.name} version : ${db.version}`)
}
//on success
request.onsuccess = e => {
db = e.target.result
alert(`success is called database name: ${db.name} version : ${db.version}`)
}
//on error
request.onerror = e => {
alert(`error: ${e.target.error} was found `)
}
}
</script>
</body>
</html>