🐛 Fixed problem with '0' interpolated as empty string

src/compiler.js

@@ -24,7 +24,8 @@ const escapeText = JSON.stringify; // (text) => '"' + text.replace(/(["\\])/g, '
  * @param {String} text
  * @returns {String}
  */
-const escapeVariable = text => '(p["' + text.trim() + '"]||"")';
+const escapeVariable = text =>
+  '(p["' + text + '"]||(p["' + text + '"]=="0"?0:""))';
 
 /**
  * Compile the translation to executable optimized function
@@ -77,7 +78,7 @@ function generateCode(parts, plural) {
     if (type === TYPE_TEXT && value) {
       code = escapeText(value);
     } else if (type === TYPE_VARIABLE) {
-      code = escapeVariable(value);
+      code = escapeVariable(value.trim());
     } else if (type === TYPE_EXPRESSION) {
       const variable = p[2];
       const cases = p[3];

test/index.js

@@ -110,6 +110,36 @@ describe('t', () => {
     expect(i18n.t('hello')).to.equal('Hi  and  !');
   });
 
+  it('interpolates with empty string if null or undefined', () => {
+    i18n.set('en', {
+      hello: 'Hi {name} !',
+    });
+
+    expect(
+      i18n.t('hello', {
+        name: null,
+      })
+    ).to.equal('Hi  !');
+
+    expect(
+      i18n.t('hello', {
+        name: undefined,
+      })
+    ).to.equal('Hi  !');
+  });
+
+  it('interpolates with 0 if string equal 0', () => {
+    i18n.set('en', {
+      msgs: '{count} message(s)',
+    });
+
+    expect(
+      i18n.t('msgs', {
+        count: 0,
+      })
+    ).to.equal('0 message(s)');
+  });
+
   it('interpolates the same placeholder multiple times', () => {
     i18n.set('en', {
       hello: 'Hi {name} and {name} !',
@@ -153,8 +183,7 @@ describe('t', () => {
 
   it('interpolates select with string and numbers', () => {
     i18n.set('en', {
-      number:
-        'Test {type,select,1{one} 2{two} other {infinity}}.',
+      number: 'Test {type,select,1{one} 2{two} other {infinity}}.',
     });
 
     expect(i18n.t('number', { type: '1' })).to.equal('Test one.');