How does the `stringformat` filter handle null or invalid input in AnQi CMS, will it return an error or a default value?
In Anqi CMS template design, we often encounter scenarios where we need to format variable output.At this point, the `stringformat` filter is particularly important, as it helps us clearly display numbers, strings, and even other types of data according to the format we preset.However, when using such tools, a common and crucial question is: how will `stringformat` handle it when the variable itself is null or invalid?Is it a direct error that causes the page to crash, or is there a more elegant default behavior?
