{"record":{"id":"03364f596a0e2868","repo":"handlebars-lang/handlebars.js","slug":"no-environment-passed-to-template","errorCode":null,"errorMessage":"No environment passed to template","messagePattern":"No environment passed to template","errorType":"exception","errorClass":"Exception","httpStatus":null,"severity":"error","filePath":"lib/handlebars/runtime.js","lineNumber":52,"sourceCode":"        ') or downgrade your runtime to an older version (' +\n        compilerVersions +\n        ').'\n    );\n  } else {\n    // Use the embedded version info since the runtime doesn't know about this revision yet\n    throw new Exception(\n      'Template was precompiled with a newer version of Handlebars than the current runtime. ' +\n        'Please update your runtime to a newer version (' +\n        compilerInfo[1] +\n        ').'\n    );\n  }\n}\n\nexport function template(templateSpec, env) {\n  /* v8 ignore next */\n  if (!env) {\n    throw new Exception('No environment passed to template');\n  }\n  if (!templateSpec || !templateSpec.main) {\n    throw new Exception('Unknown template object: ' + typeof templateSpec);\n  }\n\n  templateSpec.main.decorator = templateSpec.main_d;\n\n  // Note: Using env.VM references rather than local var references throughout this section to allow\n  // for external users to override these as pseudo-supported APIs.\n  env.VM.checkRevision(templateSpec.compiler);\n\n  // backwards compatibility for precompiled templates with compiler-version 7 (<4.3.0)\n  const templateWasPrecompiledWithCompilerV7 =\n    templateSpec.compiler && templateSpec.compiler[0] === 7;\n\n  function invokePartialWrapper(partial, context, options) {\n    if (options.hash) {\n      context = Utils.extend({}, context, options.hash);","sourceCodeStart":34,"sourceCodeEnd":70,"githubUrl":"https://github.com/handlebars-lang/handlebars.js/blob/13a7a679910d2adbfe7f6fad61ce8f98426b0378/lib/handlebars/runtime.js#L34-L70","documentation":"`Handlebars.template(templateSpec, env)` compiles a precompiled template spec into a callable template, and the `env` argument is the Handlebars environment that supplies helpers, partials, and runtime hooks. The library throws this Exception when `env` is falsy, because a template cannot execute without an environment. This normally indicates the precompiled module was invoked directly instead of through the public Handlebars API.","triggerScenarios":"Calling `template(templateSpec)` with no second argument, or calling the exported function of a precompiled template module with undefined/null env, e.g. `require('./tpl.js')(data)` where the module calls `template(spec)` internally without an environment.","commonSituations":"Invoking a precompiled template's exports manually instead of `Handlebars.template(spec)`; a stubbed or mocked runtime module returned an undefined environment; custom template-loading code forgot to pass a `Handlebars.create()` environment or the global Handlebars env.","solutions":["Compile/execute templates via the public API: `Handlebars.template(templateSpec)` or `Handlebars.compile(source)`, which supplies the environment","If calling `template` directly, pass an environment: `template(templateSpec, Handlebars.env)` or one from `Handlebars.create()`","Check that the precompiled file was generated by the matching precompiler and used with the matching runtime, not hand-edited","Verify no module mock/shim returns undefined for the Handlebars environment"],"exampleFix":"// before\ntemplate(templateSpec);\n\n// after\nimport Handlebars from 'handlebars/runtime';\nconst tmpl = Handlebars.template(templateSpec);\nconst html = tmpl(data);","handlingStrategy":"type-guard","validationCode":"import Handlebars from 'handlebars/runtime';\n\nfunction assertEnv(env) {\n  if (!env) throw new Error('template() requires a Handlebars environment');\n}\nconst env = Handlebars.create();\nassertEnv(env);\nconst tmpl = template(templateSpec, env);","typeGuard":"function hasEnvironment(env) {\n  return env != null && typeof env === 'object';\n}","tryCatchPattern":"try {\n  const tmpl = Handlebars.template(templateSpec, env);\n} catch (e) {\n  if (e.message === 'No environment passed to template') {\n    throw new Error('Use Handlebars.template(spec) or template(spec, Handlebars.env)');\n  }\n  throw e;\n}","preventionTips":["Always load precompiled templates through Handlebars.template(spec) rather than calling the module's internals directly","Create the environment once (Handlebars.create() for isolation) and reuse it","Do not stub or mock the handlebars runtime module in production builds","Verify the precompiled file imports from the runtime package so it receives the environment automatically"],"tags":["handlebars","precompiled-template","missing-argument","environment"],"backgroundTag":"missing-required-argument","analyzedSha":"13a7a679910d2adbfe7f6fad61ce8f98426b0378","analyzedAt":"2026-09-02T20:25:07.518Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-10T02:17:09.455Z"}