Undo issue related to editorjs

[sos-productions]

As Undo plugin need an inital state
`
function initUndo() {

    undo = new Undo({editor});
      
    editor.save().then((outputData) => {
        //console.log('Article data: ', outputData) //strong tags are washed where are they are allowed in config
        var initialData=outputData
        undo.initialize(initialData.blocks);
    }).catch((error) => {
        console.log('Saving failed: ', error)
    });
}

`

and in my paragaph plugin config, I have

paragraph: {
text: {
type: "string",
allowedTags: "i,b,u,a[href],strong,em,br,br,dt,dl,embed,ol,li,ul"
}
}
but edtor sanitize at least strong tag (and I guess others too) on editor.save()
/**
* Saving example
*/

    saveButton.addEventListener('click',(e) => {
            editor.save().then((savedData) => {
                alert(savedData.toSource()) //<strong> dissaper
            });
    }); 

`

so when I undo, I got only text with br tag preserved in paragraph

[Jmzp]

Hi @sos-productions, can you provide me with the sample text that you use?

[sos-productions]

Hi @Jmzp,

I just created a paragraph with some styling like strong, I took the chapter 3 of the excellent https://www.theepochtimes.com/c-how-the-specter-of-communism-is-ruling-our-world ...choose
the table of content loaded in editorjs is seen as a paragraph which json is
---8<--------------
{
type : 'paragraph',
data : {
text : text:<strong>Introduction</strong><br><strong>1. The Rise of Totalitarian Communism</strong><br>\na. The Soviet Communists\u2019 Rise to Power<br>\nb. The Chinese Communist Party\u2019s Power Grab<br><strong>2. The Brutality of Communist Rule</strong><br>\na. Soviet Communist Atrocities<br>\n\u2013 Killing by Famine<br>\n\u2013 The Gulags: Europe\u2019s First Concentration Camps<br>\n\u2013 The Great Terror Against the Soviet Elite<br>\nb. The CCP\u2019s Deadly Campaigns<br>\n\u2013 The Great Chinese Famine<br>\n\u2013 The Cultural Revolution: Slaughter and Cultural Genocide<br>\n\u2013 Unprecedented Evil: The Persecution of Falun Gong<br><strong>3. A Century of Killing</strong><br><strong>References</strong>
}
}
-----8<-------------------

As I told you, if make a little change on the paragraph and undo , it is was washing all the tags including strong.
due to the call this.editor.save().then((savedData) => {

Now I fixed it with 4 steps:

1. a patch on editor.js I submitted here Handles extra parameter sanitizeDisable for saving block(s) codex-team/editor.js#1281 , waiting
   to be approved.
2. I rebuild the editor with ./build helper script
3. in index.js of Undo plugin. lin 81, I set editor.save(true) this time
4. I rebuilt too Undo Plugin

and it works like a charm.