如何在 VS Code 中验证所选文本为 JSON？

Question

Is there an extension or other solution that allows you to validate selected text as JSON in VS Code?

It's something very simple in concept that I've been doing for years in Notepad++, but surprisingly I still haven't found a way to do this in VS Code. The three most popular JSON extensions I installed were not able to do this.

To validate a JSON text block, I currently have to copy the text, then paste it into something like jsonlint.com to validate. There's got to be a better way than this in VS Code.

UPDATE: I'm aware a JSON document is automatically linted in VS Code, but I often work with non-JSON files that have JSON snippets, so it won't work in my situation. Here's an example that caused a real issue on production because of the missing comma that wasn't marked with a red squiggly in VS Code:

[some_template.liquid]

{% schema %}
  {
    ...
    "settings": [
      {
        "type": "header",
        "content": "Content"
      }
      {
        "type": "text",
        "id": "some_id",
        "label": "Some Label"
      }
    ],
    ...
  }
{% endschema %}

Hence, I need a solution that allows me to select a block of text, run a command like "Validate JSON", and have it either auto-correct the selected text, add red squigglies to indicate errors in the JSON, or output a list of errors in the Problems console.

Answer 1

If you create a new file in VScode and select language as "JSON", it should automatically validate JSON text inside. You can see problems with the invalid json text in the "Problems" tab in VS code

Answer 2

The extension JSON Tools by Erik Lynd allows you to operate on selections.

Select a piece of code and call the minify or prettify command (there are keybindings defined), it performs a tryParseJSON call and notifies with an info message. If needed you can add a tryParse only command.