Vue2.xx prompts [vue warn]: Error in render: "typeerror: cannot read property 'img 'of undefined"

Item is a piece of data requested from the background, which contains IMG, but prompts that IMG is not defined

Code of the Child component when the parent component transmits data to the child component:

Tip:

Cause: it may be that the page rendering and request data are asynchronous operations, the data has not been requested to end, the page has started rendering, so at the beginning of reporting undefined variables, after the data acquisition is complete, rendering again, the page content is displayed, but the warning at the beginning is also displayed.

Solution:

1.

2. Before using item, V-If = "item"

Vue2.xx prompts [vue warn]: Error in render: "typeerror: cannot read property 'img 'of undefined"