Using AngularJS to Identify Parent-Child Nodes in JSON Data

I am in need of a JSON parsing guide that allows me to navigate through questions and locate child questions based on the Yes section. I have been unable to find any resources specifically addressing how to check for child nodes in JSON, with Angular being my preferred framework.

Some potential use cases include:

  1. Displaying the Root question upon loading,
  2. Displaying subsequent child questions based on user selection from the root node, then progressing forward,
  3. Navigating through various questions within the tree structure.


treeObj={
  "Root_Element": {
    "id": "myTree",
    "dt": {
      "choice": {
        "id": '0',
        "title": "Which color",
        "description": "Choose color ?",
        "choice": [
          {
            "id": 1,
            "title": "Yellow",
            "description": "Yellow ? ,
            "choice": [
              {
                "id": 5,
                "title": "Dark Yellow",
                "description": "Dark Yellow ? 
              },
              {
                "id": 4,
                "title": "Light Yellow",
                "description": "Light Yellow ? 
              }
            ]
          },
          {
            "id": 2,
            "title": "Red",
            "description": "Red ?"
          },
          {
            "id": 3,
            "title": "Green",
            "description": "Green ?
          }
        ]
      }
    }
  }
}

Answer №1

One way to efficiently extract data from a fixed number of levels in a JSON object is by utilizing ES6 destructuring. This method can simplify the process, especially when the structure of the JSON object remains static. Here's an illustration:

const metadata = {
title: "Scratchpad",
translations: [
   {
    locale: "de",
    localization_tags: [ ],
    last_edit: "2014-04-14T08:43:37",
    url: "/de/docs/Tools/Scratchpad",
    title: "JavaScript-Umgebung"
   }
],
url: "/en-US/docs/Tools/Scratchpad"
};

const { title: englishTitle, translations: [{ title: localeTitle }] } = metadata;

console.log(englishTitle); // "Scratchpad"
console.log(localeTitle);  // "JavaScript-Umgebung"

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