interface 'Symbol' is not exported

[taoqf]

typings/dojo-core/dojo-core-2.0.0-pre.d.ts(912,11): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(913,11): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(956,7): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(959,7): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(973,7): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(1020,11): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(1021,11): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(1035,7): error TS2304: Cannot find name 'Symbol'.
typings/dojo-core/dojo-core-2.0.0-pre.d.ts(1036,7): error TS2304: Cannot find name 'Symbol'.

[taoqf]

this occurse when target is es5
"target": "es5",

"target": "es6",is ok

[kitsonk]

Because the Symbol can conflict with other declarations (like when targeting ES6) when consuming core while targeting es5 you need to have the typings/symbol-shim.d.ts included in your project as well as the [typings/dojo-core/dojo-core-2.0.0-pre.d.ts]. Eventually we will figure out a better way to do this or properly document it.

[taoqf]

when i upgrade dojo-core to alpha7, i find the file symbol-shim.d.ts is missing.
and i got the same error, again. what should i do? help me please @kitsonk

[taoqf]

luckly, i have found the symbol-shim.d.ts and added to my typings

[kitsonk]

@taoqf yes, sorry... we migrated to typings/typings. We are now maintain this (and other typings) at dojo/typings.

The file is located here: symbol-shim.d.ts and you can also have this managed by "typings/typings" by adding the following entry to your typings.json:

{
  "globalDevDependencies": {
    "symbol-shim": "github:dojo/typings/custom/symbol-shim/symbol-shim.d.ts#9a0185f465a3febe2bb1ff3f1210f43e5f96c5d2"
  }
}

[kitsonk]

Also, note that in TypeScript 2, we should be able to declare the Symbol interface in dojo-core and not have have a conflict (see Microsoft/TypeScript#8696).

[taoqf]

thanks