No, it’s not allowed in JS either, however there is a proposal to add it. For now, just use the two-step process with importing into a local variable and exporting that: // file: constants.js export const SomeConstant1 = ‘yay’; export const SomeConstant2 = ‘yayayaya’; // file: index.js import * as Constants from ‘./constants.js’; export {Constants};
I do not understand why it is necessary to have the async keyword before the function keyword. For the same reason that we have the * symbol before generator functions: They mark the function as extraordinary. They are quite similar in that regard – they add a visual marker that the body of this function … Read more
If your intention is to some other scope, iterate over it, do some other stuff, then be able to iterate over it again later on in that same scope. Then the only thing you shouldn’t try doing is passing the iterator, instead pass the generator: var generator = function*() { yield 1; yield 2; yield … Read more
If you don’t use a block ({}) as body of an arrow function, the body must be an expression: ArrowFunction: ArrowParameters[no LineTerminator here] => ConciseBody ConciseBody: [lookahead ≠ { ] AssignmentExpression { FunctionBody } But throw is a statement, not an expression. In theory () => throw x; is equivalent to () => { return … Read more
You can use map to iterate the data and check for the fieldName, if fieldName is cityId then you need to change the value and return a new object otherwise just return the same object. Write it like this: var data = [ {fieldName: ‘title’, valid: false}, {fieldName: ‘description’, valid: true}, {fieldName: ‘cityId’, valid: false}, … Read more
Include an external JavaScript file Try including your (external) JavaScript into the mounted hook of your Vue component. <script> export default { mounted() { const plugin = document.createElement(“script”); plugin.setAttribute( “src”, “//api.myplugincom/widget/mykey.js” ); plugin.async = true; document.head.appendChild(plugin); } }; </script> Reference: How to include a tag on a Vue component Import a local JavaScript file In … Read more
I’ve started employing the import * as obj style within my tests, which imports all exports from a module as properties of an object which can then be mocked. I find this to be a lot cleaner than using something like rewire or proxyquire or any similar technique. I can’t speak for traceur which was … Read more
Your problem here extends from the definition for await… The await operator is used to wait for a Promise The Image.prototype.onload property is not a promise, nor are you assigning it one. If you’re wanting to return the height property after loading, I would instead create a Promise… addImageProcess(src){ return new Promise((resolve, reject) => { … Read more
If you are using Vue 3 and dealing with Proxies, Vue provides some methods to help with this: import { isProxy, toRaw } from ‘vue’; Using these, you can check if an object is a proxy with isProxy, for example: isProxy(reactiveObjectOrArray) ? ‘yup’ : ‘nope’ And you can extract the raw data using toRaw: const … Read more
They don’t seem to expose the List to be accessible from the instanced Object. This is from the EcmaScript Draft: 23.2.4 Properties of Set Instances Set instances are ordinary objects that inherit properties from the Set prototype. Set instances also have a [[SetData]] internal slot. [[SetData]] is the list of values the Set is holding. … Read more