[Bug] editor.render with "blocks":[] breaks the editor

(Not sure if exact duplicate of https://github.com/codex-team/editor.js/pull/1741 )

Steps to reproduce:

1. call editor.render with this json: {“time”:1655483036373,“blocks”:[],“version”:“2.24.3”}
2. Observe editor gives errors in console, and it is now impossible to add blocks or type into the editor.

Expected behavior: Editor operates as normal, with either no blocks present or with one default block.

Workaround: If you make a blank document and save it, it returns “blocks”:[]. However you cannot load this to get back your blank document. I’ve had to manually change blank documents to have instead: “blocks”:[{“id”:“dvSFGiwGIy”,“type”:“paragraph”,“data”:{“text”:“”}}] With at least one block, the file loads correctly.

Screenshots: I get three different errors when clicking around on the broken editor:

Editor.js 2.24.3 There is no block at index -1 8 editor.js:1:3853 Uncaught TypeError: this.Editor.BlockManager.lastBlock is undefined Uncaught TypeError: s is undefined value editor.js:1 value editor.js:1 value editor.js:1 on editor.js:1 value editor.js:1 value editor.js:1 t editor.js:1 l editor.js:1 _invoke editor.js:1 e editor.js:1 n editor.js:1 s editor.js:1 exports editor.js:1 exports editor.js:1 value editor.js:1 t editor.js:1 l editor.js:1 _invoke editor.js:1 e editor.js:1 n editor.js:1 s editor.js:1 exports editor.js:1 exports editor.js:1 value editor.js:1 t editor.js:1 l editor.js:1 _invoke editor.js:1 e editor.js:1 n editor.js:1 s editor.js:1 exports editor.js:1 exports editor.js:1 promise callback*t/</< editor.js:1 t editor.js:1 l editor.js:1 _invoke editor.js:1 e editor.js:1 n editor.js:1 s editor.js:1 exports editor.js:1 exports editor.js:1 value editor.js:1 t editor.js:1 l editor.js:1 _invoke editor.js:1 e editor.js:1 n editor.js:1 s editor.js:1 promise callback*n editor.js:1 s editor.js:1 promise callback*n editor.js:1 s editor.js:1 exports editor.js:1 exports editor.js:1 promise callback*t editor.js:1 t editor.js:1 <anonymous> book.js:1 <anonymous> book.js:1 <anonymous> book.js:1 Device, Browser, OS:

Device, Browser, OS: Desktop/Firefox/Windows 10

Editor.js version: 2.24.3

Plugins you use with their versions: paragraph@2.8.0 header@2.6.2 simple-image@1.4.1 delimiter@1.2.0

[AlexRMU]

Instead of blocks: [], use blocks: [{ type: "paragraph", data: {} }]

[dafrina]

this is a real problem for me… is there any way to check if the editor is empty? i found that editor.clear() works but editor.render() breaks so if i could check if its empty and call a clear before safing that would fix it

Since the devs dont seem to care to address one of the most basic functionalities of an editor I resolved it by making sure the editor is never empty. Initialize it with a block saying „enter content here“ or something and dont save when the editor is empty.