handlebars-lang/handlebars.js · error · Handlebars.Exception

Name missing for template

Error message

Name missing for template

What it means

In non-simple mode the CLI registers each precompiled template under a name; when a template has no name (usually an unnamed file/stdin input), the generator throws because it cannot build the Handlebars.templates['name'] entry.

Source

Thrown at lib/precompiler.js:238

    }

    let precompiled = Handlebars.precompile(template.source, options);

    // If we are generating a source map, we have to reconstruct the SourceNode object
    if (opts.map) {
      let consumer = await new SourceMapConsumer(precompiled.map);
      precompiled = SourceNode.fromStringWithSourceMap(
        precompiled.code,
        consumer
      );
      consumer.destroy();
    }

    if (opts.simple) {
      output.add([precompiled, '\n']);
    } else {
      if (!template.name) {
        throw new Handlebars.Exception('Name missing for template');
      }

      output.add([
        objectName,
        "['",
        template.name,
        "'] = template(",
        precompiled,
        ');\n',
      ]);
    }
  }

  // Output the content
  if (!opts.simple) {
    output.add('})();');
  }

View on GitHub (pinned to 13a7a67991)

Solutions

1. Pass templates as named files/directories rather than stdin so a name can be derived
2. Use -s/--simple mode if you intentionally compile one anonymous template
3. Ensure the input file has a valid filename (extension stripped becomes the template name)

Example fix

// before
cat src/templates/home.hbs | handlebars -f dist/tpl.js

// after
handlebars src/templates/home.hbs -f dist/tpl.js
// or for anonymous output
handlebars -s src/templates/home.hbs -f dist/home.js

if (!flags.simple && (!inputFile || inputFile === '/dev/stdin')) {
  throw new Error('Non-simple CLI mode needs a named template file (stdin has no name)');
}

function isNamedTemplate(t) {
  return typeof t.name === 'string' && t.name.length > 0;
}

try {
  execSync(cliCmd);
} catch (e) {
  if (/Name missing for template/.test(e.message)) {
    // pass a named file instead of stdin, or add -s for anonymous output
  } else throw e;
}

When it happens

Trigger: Running the CLI in default (non-simple) mode with a template that has no name — e.g. piping via stdin or an input that produced no derived name.

Common situations: cat template.hbs | handlebars (stdin has no filename); renaming/normalization logic stripping the extension left an empty name; unusual file layouts where the name can't be derived.

Related errors

• Must define at least one template or directory.
• Unable to minimize simple output
• Unable to output multiple templates in simple mode
• Invalid stack pop
• Must pass iterator to #each

AI-assisted analysis of handlebars-lang/handlebars.js@13a7a67991 (2026-09-02). Data as JSON: /api/errors/1814e3a7933a2e11. Report an issue: GitHub.