Custom Variable Template for Google Tag Manager

Extract element from JSON object or valid JSON string by path using dot-notation

Create a new variable with this template. Choose a variable as input that holds an array or JSON object like a cookie value that contains consent settings. Then define a path to the desired element / property using dot-notation.

The variable will parse the input (if neccessary) and query the defined path. returns the value of the element. If the result is an object, if can be stringified.

If the input consists of the following object or the corresponding JSON string:

{
  something: 42,
  some_object: {key1: 'value1', key2: 'value2', key3: 'value3'},
  items: [
    {itemName: 'example item 1', itemPrice: 199},
    {itemName: 'example item 2', itemPrice: 321.5},
  ]
}

... then the following paths will fetch these values:

Querying an array with this template can be done by starting the path with an index. "[0]" as a path returns the first element; [0].price the "price" element in an object in the first element of an array.