Pass default parameter values in function react

Question

I got this error after updating react-native and react

I think this is right syntax, but I don't know why this error is shown:

 this.list = function(table, callback, wheredata = [],selection = '',extra = '') {

SyntaxError: Unexpected token =
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:387:25)
at Object.Module._extensions..js (module.js:422:10)
at Module.load (module.js:357:32)
at Function.Module._load (module.js:314:12)
at Module.require (module.js:367:17)
at require (internal/module.js:16:19)
at Object. (/Users/apcrat/Documents/redux/delfoo_React/api/model/catalog/cuisine_route.js:7:12)
at Module._compile (module.js:413:34)
at Object.Module._extensions..js (module.js:422:10)

You are going to need to give more context.. Are you using that in a class? — Nicholas Robinson
– Nicholas Robinson, Commented Aug 8, 2016 at 12:05
you cannot set default value for argument in Ecmascript 5. you can set wheredata = wheredata || []; inside your function — Olivier Boissé
– Olivier Boissé, Commented Aug 8, 2016 at 12:18

Community · Accepted Answer · 2017-05-23 10:34:08Z

2

You need to compile your code with Babel.js to use Ecmascript 6 features or if you want to work on es5, you can do like this

edited May 23, 2017 at 10:34

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answered Aug 8, 2016 at 13:43

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1 Comment

Nilay Brahmbhatt Over a year ago

I am tried to work on React-native. and i am using this to create API.and i am also using babel.js and ES5

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