SWML - Document that SWML uses v8 7.8 for JS expressions.

[Devon-White]

v8 version 7.8 is what SMWL uses to utilize JS expressions in SWML.

Additional Notes

Fallback values

Given V8 version 7.8 (from 2019), the nullish coalescing operator (??) was not yet supported in that version. So, you would typically use the logical OR (||) operator for fallback values.

let x; // assume this is defined at some point

let b = x || 5;

How it works:

• If x is any "falsy" value (undefined, null, 0, '', false, NaN), b will be set to 5.
• If x is any "truthy" value, b will be set to x.

Example:

let x = 0;
let b = x || 5; // b will be 5, because 0 is falsy

Caveat

If you want b to be 0 when x is 0, or ' ' when x is an empty string, then || is not suitable. But in V8 7.8, you don't have ??, so you have to use || or write a more verbose check:

let b = (x !== undefined && x !== null) ? x : 5;