Code block parameters

Code block parameters customize how a block behaves. They go on the fence declaration line, separated by spaces or semicolons:

```js hide; noSave;

Hide code

Collapses the block to its badge line in live preview — the runner (play/clear/output) keeps working, and clicking the badge reveals the source for editing. Exports also hide the code while keeping the result in place.

```js hide;
console.log("Hello");

Persist results — save / noSave

Override the "Persist code block results" setting per block:

• save; — always write the result into the note
• noSave; — never persist this block's result

```js noSave;
console.log("ephemeral");

Global scope

global makes a code block's variables and functions accessible to other blocks.

```js global;
const url = "http://mywebsite/";

Preload code

preload runs the code once before all other blocks — useful to fetch data or initialize variables up front, and to prevent API overload when several blocks share the same call.

```js preload;
data = webApi(url);

Load a block

Name a block with blockName=, then load its content (JSON, CSV, any format) from a script with loadBlock:

```json blockName=json
{
  "name": "Anthony",
  "application": "Znote"
}
```

```js
const result = loadBlock("json");
print(result);
```

Prevent execution

• noRun; — the block is never executed (documentation, code examples).

Frontend scripts

scripts=name1,name2 injects declared external JS scripts into the block.

Magic comments

Run with Node.js

Executes the code block as a Node.js child process, like node myscript.js:

//exec: node

You can also point at a specific Node.js installation:

//exec: /usr/local/bin/node

🛠 By default, Znote uses the global Node.js installation configured in Settings.