Support TypeScript typecasts

Fixes #603
i18next · Jun 14, 2022 · dbe5156 · dbe5156
1 parent 67cf845
commit dbe5156
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diff --git a/src/lexers/jsx-lexer.js b/src/lexers/jsx-lexer.js
@@ -203,7 +203,14 @@ export default class JsxLexer extends JavascriptLexer {
               type: 'text',
               content: '',
             }
-          } else if (child.expression.kind === ts.SyntaxKind.StringLiteral) {
+          }
+
+          // simplify trivial expressions, like TypeScript typecasts
+          if (child.expression.kind === ts.SyntaxKind.AsExpression) {
+            child = child.expression
+          }
+
+          if (child.expression.kind === ts.SyntaxKind.StringLiteral) {
             return {
               type: 'text',
               content: child.expression.text,

diff --git a/test/lexers/jsx-lexer.test.js b/test/lexers/jsx-lexer.test.js
@@ -341,6 +341,15 @@ describe('JsxLexer', () => {
         done()
       })
 
+      it('erases typecasts', (done) => {
+        const Lexer = new JsxLexer()
+        const content = '<Trans>{{ key: property } as any}</Trans>'
+        assert.deepEqual(Lexer.extract(content), [
+          { key: '{{key}}', defaultValue: '{{key}}' },
+        ])
+        done()
+      })
+
       it('keeps self-closing tags untouched when transSupportBasicHtmlNodes is true', (done) => {
         const Lexer = new JsxLexer({ transSupportBasicHtmlNodes: true })
         const content = '<Trans>a<br />b</Trans>'