Implement Vue's v-bind Shorthand in a Custom Renderer

This challenge asks you to implement a simplified version of Vue's v-bind shorthand functionality for a custom rendering engine. This shorthand allows developers to bind a JavaScript variable directly to an HTML attribute when the variable name and attribute name are identical, making templates more concise. Understanding this concept is crucial for efficient and readable Vue development.

Problem Description

You are tasked with creating a function that processes a virtual DOM (VDOM) node, specifically handling attribute binding with the v-bind shorthand syntax. Your function will take a VDOM node object and a set of data properties, and it should update the VDOM node's attributes according to the shorthand rules.

Key Requirements:

1. Shorthand Detection: Identify attributes in the VDOM node that start with :. This prefix signifies the v-bind shorthand.
2. Attribute and Variable Mapping: For each shorthand attribute, extract the actual attribute name (the part after :) and map it to a corresponding property in the provided data object.
3. Attribute Assignment: If a matching property exists in the data object, assign its value to the corresponding attribute on the VDOM node.
4. Attribute Removal: If a shorthand attribute is found but the corresponding property does not exist in the data object, the shorthand attribute should be removed from the VDOM node.
5. Non-Shorthand Attributes: Attributes that do not start with : should be left untouched.

Expected Behavior:

Your function should modify the attributes property of the VDOM node object in place.

Edge Cases:

• An attribute name that is just : (e.g., :{}). This should be treated as an invalid shorthand and potentially removed or ignored.
• The data object might be empty or null/undefined.
• The VDOM node might have no attributes.

Examples

Example 1:

Input VDOM Node:
{
  tagName: 'div',
  attributes: {
    id: 'my-element',
    ':class': 'active',
    ':style': 'highlight'
  },
  children: []
}

Input Data:
{
  active: true,
  highlight: { color: 'red' }
}

Output VDOM Node:
{
  tagName: 'div',
  attributes: {
    id: 'my-element',
    class: true,
    style: { color: 'red' }
  },
  children: []
}

Explanation:
The ':class' attribute is mapped to the 'class' attribute and its value is set to the 'active' property from the data (true).
The ':style' attribute is mapped to the 'style' attribute and its value is set to the 'highlight' property from the data ({ color: 'red' }).
The 'id' attribute is not a shorthand and is left as is.

Example 2:

Input VDOM Node:
{
  tagName: 'button',
  attributes: {
    ':disabled': 'isDisabled',
    ':data-count': 'count'
  },
  children: []
}

Input Data:
{
  count: 5
}

Output VDOM Node:
{
  tagName: 'button',
  attributes: {
    'data-count': 5
  },
  children: []
}

Explanation:
The ':data-count' attribute is mapped to 'data-count' and its value is set to the 'count' property from the data (5).
The ':disabled' attribute is found, but 'isDisabled' is not present in the data. Therefore, the ':disabled' attribute is removed from the VDOM node's attributes.

Example 3: (Edge Case)

Input VDOM Node:
{
  tagName: 'span',
  attributes: {
    ':': 'invalidAttribute'
  },
  children: []
}

Input Data:
{
  invalidAttribute: 'someValue'
}

Output VDOM Node:
{
  tagName: 'span',
  attributes: {},
  children: []
}

Explanation:
The attribute ':' is not a valid shorthand as it does not have a corresponding attribute name after the colon. It is removed.

Constraints

• The VDOM node object will have a structure with tagName (string), attributes (object), and children (array).
• The attributes object will contain key-value pairs where keys are attribute names (strings) and values can be of any primitive type or object.
• The data object will be a plain JavaScript object.
• Your function should process all attributes of a given VDOM node.
• The modification to the VDOM node should be done in-place.

Notes

• Think about how to safely access and modify the attributes object.
• Consider using Object.entries() or a for...in loop to iterate over the attributes.
• Remember to handle the case where the input data might be null or undefined.
• The colon : itself should not be considered a valid attribute name after the shorthand prefix.