when i npm run dev i find in ios safari and not can open my project

[roy201603]

• Operating System:IOS
• Node Version:8.11.4
• NPM Version:5.6.0
• webpack Version:3.6.0
• webpack-dev-server Version:2.7.1

• This is a bug
  when i npm run dev i find in ios safari and not can open my project
  and also find
  SyntaxError: Unexpected keyword 'const'. Const declarations are not supported in strict mode.
  /app.js:57856:0
  and i search when webpack-dev-server version up 2.7.1 some people have report this problem
  so i install webpack-dev-server version is 2.7.1 but no use so i need how to slove this problem
  but in iphone mobile it will can open but in PC it is not use

• This is a modification request

Code

  // webpack.config.js

  // additional code, remove if not needed.

Expected Behavior

Actual Behavior

For Bugs; How can we reproduce the behavior?

For Features; What is the motivation and/or use-case for the feature?

[roy201603]

[michael-ciniawsky]

It seems when you bundle your application a tool like e.g babel (babel-loader) adds a 'use strict'; pragma to the bundle file and depending on the browser (e.g without decent ES2015 (ES6) support) you're using this might leads to the current {Error} you're experiencing. Try to remove the pragma from the app.js file and check if this fixes your {Error}, then checkout how to disable that behavior. I'm closing this issue since it's likely unrelated to webpack-dev-server in particular, but feel free to reopen if more information is provided why this maybe related

[michael-ciniawsky]

#1270

Updated to at least webpack-dev-server >= v2.11.0

[roy201603]

i have install webpack-dev-server to 2.11.3 and not use babel-loader strict mode so you think this is babel bring this problem?

[michael-ciniawsky]

Either webpack or babel (babel-loader) add a 'use strict' pragma (I think it is babel). e.g

file.js

const a = 42

file.transpiled.js

'use strict'; // <= added by babel

var a = 42;

yet you exlude the node_modules folder and one of your dependencies might use ES6 Syntax which doesn't get transpiled atm eventually leading to e.g

file.js

import dep from 'pkg'

const a = 42

file.transpiled.js

'use strict'; // <= added by babel

// import dep from 'pkg' (not transpiled)
const dep = true // <= {Error}

var a = 42;