Sure, just use .reduce to assign to a new object: const input = { key:’val’, key2:’val2′, key3:’val3′ }; const output = Object.entries(input) .filter(([k, v]) => { return true; // some irrelevant conditions here }) .reduce((accum, [k, v]) => { accum[k] = v; return accum; }, {}); console.log(output); In modern browsers, you can also use Object.fromEntries … Read more
you can try install babel’s global version npm install -g babel-cli
use filter and map: const arr =[{“value”:”abc”,”checked”:true},{“value”:”xyz”,”checked”:false},{“value”:”lmn”,”checked”:true}]; const result = arr.filter(res=>res.checked).map(ele=>ele.value); console.log(result);
I was able to resolve this issue by adding this block of code at the top of each file.js that accused the error /*jshint esversion: 6 */ Example:
your node version doesn’t support import. use require instead: var Message = require(‘./path’).Message; — update — since you are trying to import a .ts file, you need to write that in the path. like this: require(‘./path.ts’);
For me it worked to mark all “private” properties with a prefixed underscore. Obviously Webstorm/IntelliJ recognized the properties as something that should not be exported. export class someOne { constructor(param) { this._test = param; } useTest(){ return this._test; } } console.log(new someOne(123).useTest());
From an HTML document, you can use the <link rel=”modulepreload”> element to perform that integrity check, which is unfortunately currently supported only in Blink browsers. // default script import( “https://unpkg.com/redom@3.2.1/dist/redom.es.js” ) .then( module => console.log( ‘from default script:’, typeof module.List ) ) .catch( console.error ); <link rel=”modulepreload” href=”https://unpkg.com/redom@3.2.1/dist/redom.es.js” integrity=”sha384-notthecorrectsha”> <script type=”module”> import { List } … Read more
Finally found the real answer: http://tc39wiki.calculist.org/es6/weak-map/ A key property of Weak Maps is the inability to enumerate their keys. This is necessary to prevent attackers observing the internal behavior of other systems in the environment which share weakly-mapped objects. Should the number or names of items in the collection be discoverable from the API, even … Read more
You can compare the definition of Function.prototype.apply and Reflect.apply in the spec. Basically they are equivalent, but there is a difference: if the arguments list is null or undefined, Function.prototype.apply will call the function with no arguments, and Reflect.apply will throw. function func() { return arguments.length; } func.apply(void 0, null); // 0 Reflect.apply(func, void 0, … Read more
This could be a direct reference (A -> B -> A) issue, which even you might be doing. // file a.ts import { b } from ‘b’; … export a; // file b.ts import { a } from ‘a’; … export b; Read HERE more about “Eliminate Circular Dependencies from Your JavaScript Project”: Once I … Read more