feat: add eq and ne helpers (#16)

README.md

@@ -199,6 +199,26 @@ const data = {
 console.log(m("{{#unless isAdmin}}Hello guest{{/unless}}", data)); // --> 'Hello guest'
 ```
 
+#### eq
+
+> Added in `v0.9.0`.
+
+The `eq` helper renders the blocks only if the two values provided as argument are equal. Example:
+
+```javascript
+console.log(m(`{{#eq name "bob"}}Hello bob{{/eq}}`, {name: "bob"})); // --> 'Hello bob'
+```
+
+#### ne
+
+> Added in `v0.9.0`.
+
+The `ne` helper renders the block only if the two values provided as argument are not equal. Example:
+
+```javascript
+console.log(m(`{{#ne name "bob"}}Not bob{{/ne}}`, {name: "John"})); // --> 'Not bob'
+```
+
 ### Custom Helpers
 
 > Added in `v0.5.0`.

index.js

@@ -26,6 +26,8 @@ const defaultHelpers = {
     },
     "if": (value, opt) => !!value ? opt.fn(opt.context) : "",
     "unless": (value, opt) => !!!value ? opt.fn(opt.context) : "",
+    "eq": (a, b, opt) => a === b ? opt.fn(opt.context) : "",
+    "ne": (a, b, opt) => a !== b ? opt.fn(opt.context) : "",
 };
 
 const compile = (tokens, output, context, partials, helpers, vars, fn = {}, index = 0, section = "") => {

test.js

@@ -185,6 +185,34 @@ describe("{{#unless }}", () => {
     });
 });
 
+describe("{{#eq }}", () => {
+    it("should render block if two values are equal", () => {
+        assert.equal(m(`{{#eq value "a"}}yes!{{/eq}}`, {value: "a"}), "yes!");
+        assert.equal(m(`{{#eq value true}}yes!{{/eq}}`, {value: true}), "yes!");
+        assert.equal(m(`{{#eq value 0}}yes!{{/eq}}`, {value: 0}), "yes!");
+    });
+
+    it("should not render block if two values are not equal", () => {
+        assert.equal(m(`{{#eq value "a"}}yes!{{/eq}}`, {value: "b"}), "");
+        assert.equal(m(`{{#eq value true}}yes!{{/eq}}`, {value: false}), "");
+        assert.equal(m(`{{#eq value 0}}yes!{{/eq}}`, {value: 1}), "");
+    });
+});
+
+describe("{{#ne }}", () => {
+    it("should not render block if two values are equal", () => {
+        assert.equal(m(`{{#ne value "a"}}yes!{{/ne}}`, {value: "a"}), "");
+        assert.equal(m(`{{#ne value true}}yes!{{/ne}}`, {value: true}), "");
+        assert.equal(m(`{{#ne value 0}}yes!{{/ne}}`, {value: 0}), "");
+    });
+
+    it("should render block if two values are not equal", () => {
+        assert.equal(m(`{{#ne value "a"}}yes!{{/ne}}`, {value: "b"}), "yes!");
+        assert.equal(m(`{{#ne value true}}yes!{{/ne}}`, {value: false}), "yes!");
+        assert.equal(m(`{{#ne value 0}}yes!{{/ne}}`, {value: 1}), "yes!");
+    });
+});
+
 describe("{{#customHelper }}", () => {
     it("should allow to execute a simple custom helper", () => {
         const options = {