when develop expree meet some errors, we show how to solve

Error: No default engine was specified and no extension was provided.

How to solve:

app.set('view engine','ejs');

Error: Cannot find module 'ejs'

How to solve:

C:\Users\admin\WebstormProjects\learning-express-step9>npm install jade --save

npm WARN deprecated jade@1.11.0: Jade has been renamed to pug, please install the latest version of pug instead of jade

npm WARN deprecated transformers@2.1.0: Deprecated, use jstransformer

npm WARN deprecated constantinople@3.0.2: Please update to at least constantinople 3.1.1

npm WARN saveError ENOENT: no such file or directory, open 'C:\Users\admin\WebstormProjects\learning-express-step9\package.json'

npm WARN enoent ENOENT: no such file or directory, open 'C:\Users\admin\WebstormProjects\learning-express-step9\package.json'

npm WARN learning-express-step9 No description

npm WARN learning-express-step9 No repository field.

npm WARN learning-express-step9 No README data

npm WARN learning-express-step9 No license field.

+ jade@1.11.0

added 47 packages from 105 contributors and audited 340 packages in 10.743s

found 3 low severity vulnerabilities

run `npm audit fix` to fix them, or `npm audit` for details

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