Trilium widget to open italicized file paths. Only works in Desktop app. Add as "JS Frontend" note and make sure it has the #widget property.

openfilepath.js

/* License: MIT https://opensource.org/licenses/MIT
 * Made by: GEOsens GmbH 2023 
 * 
 * Usage: Italicize the file path. The italicized file or folder can be opened with a double click.
 * 
 * Note: there is not indication that a path is clickable, thanks ckeditor.
 */

async function onClickOpenPath(event) {
    // check if event was on Italicised
    if (event.target.tagName == "I") {
        var path = event.target.innerText;
        // check if content is path (rudimentary)
        if (/[a-zA-Z]:.*|\\\\\w.*?\\\w/.test(path)) {
            // use backend to open file from path
            await document.PathLinkerApi.runOnBackend(async (path) => {
                const shell = require('electron').shell;
                await shell.openPath(path);
                return;
            }, [path]);
        }
    }
}

const TEMPLATE = `
<div style="padding: 10px; border-top: 1px solid var(--main-border-color); contain: none;">
<script>
${onClickOpenPath.toString()}
document.addEventListener('dblclick', onClickOpenPath);
</script>
</div>`;

class PathLinkerWidget extends api.NoteContextAwareWidget {
    constructor(...args) {
        super(...args);
        this.balloonEditorCreate = null;
    }
    
    get position() { 
        // higher value means position towards the bottom/right
        return 100; 
    } 

    get parentWidget() { return 'center-pane'; }

    doRender() {
        this.$widget = $(TEMPLATE);
        this.$widget.hide();
        
        // store API in document to access it from callback
        document.PathLinkerApi = api;
        return this.$widget;
    }
}

let widget = new PathLinkerWidget();
console.log("Loaded PathLinkerWidget");
module.exports = widget;

@laundmo Lol, it just needs to be setup as a "JS Frontend" note instead of JS Backend
Perhaps you could update the description for future reference?

oof really? allright I'll fix it

Could not open path: %USERPROFILE%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

Add new update for the usage of this script.
16 line: await document.PathLinkerApi.runOnBackend(async (path) => {
need update to below
16 line: await document.PathLinkerApi.runAsyncOnBackendWithManualTransactionHandling(async (path) => {

This update is due to trilium app (win 0.62.5) notice me like below once i double click on the file link line.
ERROR: You're passing an async function to api.runOnBackend() which will likely not work as you intended. Either make the function synchronous (by removing 'async' keyword), or use api.runAsyncOnBackendWithManualTransactionHandling()

add the enhanced code below， which no need the special format for the file path

async function OpenLocalPath(event) {
// Check if the event was a Ctrl+double click.
if (event.ctrlKey) {
var path = event.target.innerText.trim();
console.log(>> ctrl + double_click get line content:\n${path})
//------ Check if the text content contain a file path. ------
if (/[A-Z]:\./.test(path)) {
var path = path.match(/[A-Z]:\./)[0]
// --- replace the special string
path = path.replace("USER",require('os').userInfo().username)

        console.log(`>> Open local path: ${path}`)
        // Use the PathLinkerApi to open the file at the path.
        await document.PathLinkerApi.runAsyncOnBackendWithManualTransactionHandling(async (path) => { 
            const shell = require('electron').shell;
            await shell.openPath(path);
            return;
        }, [path]);
    }
}

}

const TEMPLATE = <div style="padding: 10px; border-top: 1px solid var(--main-border-color); contain: none;"> <script> ${OpenLocalPath.toString()} document.addEventListener('dblclick', OpenLocalPath); </script> </div>;

class PathLinkerWidget extends api.NoteContextAwareWidget {
constructor(...args) {
super(...args);
this.balloonEditorCreate = null;
}

get position() { 
    // higher value means position towards the bottom/right
    return 100; 
} 

get parentWidget() { return 'center-pane'; }

doRender() {
    this.$widget = $(TEMPLATE);
    this.$widget.hide();
    
    // store API in document to access it from callback
    document.PathLinkerApi = api;
    return this.$widget;
}

}

let widget = new PathLinkerWidget();
console.log(">> Loaded PathLinkerWidget");
module.exports = widget;

I'm unable to get either of these working. I get an error about "require" not being defined, using Trilium Next 0.90.7

frontend_script_api.js:203 Uncaught (in promise) Error: server error: require is not defined
    at x.__runOnBackendInner (frontend_script_api.js:203:19)
    at async x.runAsyncOnBackendWithManualTransactionHandling (frontend_script_api.js:243:36)
    at async HTMLDocument.onClickOpenPath (<anonymous>:9:13)