<!-- We will close this issue if you don't provide the needed information. For feature requests, delete the form below and describe the requirements and use case. --> ### Versions ``` Angular CLI: 1.7.4 Node: 8.9.0 OS: darwin x64 Angular: 5.2.10 ... animations, common, compiler, compiler-cli, core, forms ... http, language-service, platform-browser ... platform-browser-dynamic, router @angular/cdk: 5.2.5 @angular/cli: 1.7.4 @angular-devkit/build-optimizer: 0.3.2 @angular-devkit/core: 0.5.13 @angular-devkit/schematics: 0.3.2 @ngtools/json-schema: 1.2.0 @ngtools/webpack: 1.10.2 @schematics/angular: 0.3.2 @schematics/package-update: 0.3.2 typescript: 2.8.3 webpack: 3.11.0 ``` ### Repro steps <!-- Simple steps to reproduce this bug. Please include: commands run, packages added, related code changes. A link to a sample repo would help too. --> ### Observed behavior cant split ### Desired behavior <!-- What would like to see implemented? What is the usecase? What did you expect to see? --> want split vendor ### Mention any other details that might be useful (optional)