Extended isempty behavior (#722)

* Make isEmpty work with custom objects providing an isEmpty function or property. * Removed console.error * Updated bundles
selfrefactor · Feb 16, 2024 · d7ed1e7 · d7ed1e7
1 parent 988f925
commit d7ed1e7
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Showing 5 changed files with 23 additions and 1 deletion.
diff --git a/dist/rambda.js b/dist/rambda.js
@@ -1535,6 +1535,11 @@ function isEmpty(input) {
   const inputType = type(input);
   if (['Undefined', 'NaN', 'Number', 'Null'].includes(inputType)) return false;
   if (!input) return true;
+  if (type(input.isEmpty) === 'Function') {
+    return input.isEmpty();
+  } else if (input.isEmpty) {
+    return input.isEmpty;
+  }
   if (inputType === 'Object') {
     return Object.keys(input).length === 0;
   }

diff --git a/dist/rambda.umd.js b/dist/rambda.umd.js
diff --git a/source/isEmpty.js b/source/isEmpty.js
@@ -6,6 +6,13 @@ export function isEmpty(input){
     return false
   if (!input) return true
 
+  if (type(input.isEmpty) === 'Function') {
+	return input.isEmpty();
+  } else if (input.isEmpty) {
+	return !!input.isEmpty;
+  }
+
+
   if (inputType === 'Object'){
     return Object.keys(input).length === 0
   }

diff --git a/source/isEmpty.spec.js b/source/isEmpty.spec.js
@@ -13,4 +13,8 @@ test('happy', () => {
   expect(isEmpty(0)).toBeFalse()
   expect(isEmpty(NaN)).toBeFalse()
   expect(isEmpty([ '' ])).toBeFalse()
+  expect(isEmpty({ isEmpty: false})).toBeFalse()
+  expect(isEmpty({ isEmpty: () => false})).toBeFalse()
+  expect(isEmpty({ isEmpty: true})).toBeTrue()
+  expect(isEmpty({ isEmpty: () => true})).toBeTrue()
 })
diff --git a/src/isEmpty.js b/src/isEmpty.js
@@ -6,6 +6,12 @@ export function isEmpty(input){
     return false
   if (!input) return true
 
+  if (type(input.isEmpty) === 'Function') {
+	return input.isEmpty();
+  } else if (input.isEmpty) {
+	return input.isEmpty;
+  }
+
   if (inputType === 'Object'){
     return Object.keys(input).length === 0
   }