fix(compute): custom behavior lack block and inline defaults (#227)

fix(compute): custom behavior missing block and inline defaults

Author: stipsan

src/compute.ts

@@ -186,12 +186,12 @@ export default (
   target: Element,
   options: Options = {}
 ): CustomScrollAction[] => {
-  const { scrollMode, block, inline, boundary } = {
-    scrollMode: 'always',
-    block: 'center',
-    inline: 'nearest',
-    ...options,
-  }
+  const {
+    scrollMode = 'always',
+    block = 'center',
+    inline = 'nearest',
+    boundary,
+  } = options
   // Allow using a callback to check the boundary
   // The default behavior is to check if the current target matches the boundary element or not
   // If undefined it'll check that target is never undefined (can happen as we recurse up the tree)

src/index.ts

@@ -59,7 +59,8 @@ const getOptions = (options: any = true): StandardBehaviorOptions => {
   } else if (options === false) {
     return { block: 'end', inline: 'nearest' }
   } else if (isOptionsObject<StandardBehaviorOptions>(options)) {
-    return { block: 'center', inline: 'nearest', ...options }
+    // compute.ts ensures the defaults are block: 'center' and inline: 'nearest', to conform to the spec
+    return options
   }
 
   // if options = {}, based on w3c web platform test