I am using node v6.0.0 and wanted to use ES2016 (ES6). However I realized that the "import" syntax is not working. Isn't "import" fundamental to for writing modular code in ES2015? I tried running node with --harmony_modules
option as well but still got the same error about "import". Here's the code.
Working code without "import":
'use strict';
let sum = 0;
class Number {
addNumber(num1, num2) {
return num1 + num2;
}
}
let numberObj = new Number();
sum = numberObj.addNumber(1,2);
console.log("sum of two number 1 and 2 "+ sum);
Notworking code with "import":
server.js
'use strict';
import Number from "./Number";
let sum = 0;
let numberObj = new Number();
sum = numberObj.addNumber(1,2);
console.log("sum of two number 1 and 2 "+ sum);
Number.js
'use strict';
export default class Number {
addNumber(num1, num2) {
return num1 + num2;
}
}
I also checked http://node.green/ to see the supported es6 however not able to understand why it doesn't work with --harmony_modules option. Please help.
They're just not implemented yet.
Node 6.0.0 uses a version of V8 with most of ES6 features completed. Unfortunately modules isn't one of those completed features.
node --v8-options | grep harmony
in progress harmony flags are not fully implemented and usually are not working:
--es_staging (enable test-worthy harmony features (for internal use only))
--harmony (enable all completed harmony features)
--harmony_shipping (enable all shipped harmony features)
--harmony_object_observe (enable "harmony Object.observe" (in progress))
--harmony_modules (enable "harmony modules" (in progress))
--harmony_function_sent (enable "harmony function.sent" (in progress))
--harmony_sharedarraybuffer (enable "harmony sharedarraybuffer" (in progress))
--harmony_simd (enable "harmony simd" (in progress))
--harmony_do_expressions (enable "harmony do-expressions" (in progress))
--harmony_iterator_close (enable "harmony iterator finalization" (in progress))
--harmony_tailcalls (enable "harmony tail calls" (in progress))
--harmony_object_values_entries (enable "harmony Object.values / Object.entries" (in progress))
--harmony_object_own_property_descriptors (enable "harmony Object.getOwnPropertyDescriptors()" (in progress))
--harmony_regexp_property (enable "harmony unicode regexp property classes" (in progress))
--harmony_function_name (enable "harmony Function name inference")
--harmony_regexp_lookbehind (enable "harmony regexp lookbehind")
--harmony_species (enable "harmony Symbol.species")
--harmony_instanceof (enable "harmony instanceof support")
--harmony_default_parameters (enable "harmony default parameters")
--harmony_destructuring_assignment (enable "harmony destructuring assignment")
--harmony_destructuring_bind (enable "harmony destructuring bind")
--harmony_tostring (enable "harmony toString")
--harmony_regexps (enable "harmony regular expression extensions")
--harmony_unicode_regexps (enable "harmony unicode regexps")
--harmony_sloppy (enable "harmony features in sloppy mode")
--harmony_sloppy_let (enable "harmony let in sloppy mode")
--harmony_sloppy_function (enable "harmony sloppy function block scoping")
--harmony_proxies (enable "harmony proxies")
--harmony_reflect (enable "harmony Reflect API")
--harmony_regexp_subclass (enable "harmony regexp subclassing")