How can you read a JSON file and modify a property before using it in a test?

hard📝 Application Q9 of 15

Cypress - File Operations

How can you read a JSON file and modify a property before using it in a test?
Choose the correct approach.

Acy.readFile('data.json').then(data => data.newProp = 123); cy.log(data.newProp)

Bconst data = cy.readFile('data.json'); data.newProp = 123;

Ccy.readFile('data.json').newProp = 123;

Dcy.readFile('data.json').then(data => { data.newProp = 123; /* use data here */ })

Step-by-Step Solution

Solution:

Step 1: Use .then() to access and modify JSON data
Modification must happen inside the .then() callback where data is available.
Step 2: Avoid accessing data outside the callback
Assigning or modifying outside causes errors or undefined behavior.
Final Answer:
cy.readFile('data.json').then(data => { data.newProp = 123; /* use data here */ }) -> Option D
Quick Check:
Modify data inside .then() callback only [OK]

Quick Trick: Modify JSON data only inside .then() callback [OK]

Common Mistakes:

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