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Showing posts with the label Ecmascript 6

Mediarecorder Ondataavailable Work Successfully Once

MediaRecorder ondataavailable work successful once. I need to get blob, get it base64, send to my s… Read more Mediarecorder Ondataavailable Work Successfully Once

Javascript Es6 Tagged Templates - When Is Raw Used? When Is Cooked Used?

After studying this Es6 tag template example: var yo = func`${x} + ${y}\n= ${x + y}`; one@public-… Read more Javascript Es6 Tagged Templates - When Is Raw Used? When Is Cooked Used?

Switch Statement And Scopes In Es2015

Consider this ES2015 module and the behavior when run in node v4.4.5. 'use strict' const o… Read more Switch Statement And Scopes In Es2015

What Is The Technical Definition Of A Javascript Iterable And How Do You Test For It?

I've been implementing a useful subclass of the ES6 Set object. For many of my new methods, I … Read more What Is The Technical Definition Of A Javascript Iterable And How Do You Test For It?

Unclickable Touchablehighlight

I got this code constructor(props){ super(props); this.MyClick = this.MyClick.bind(this) }… Read more Unclickable Touchablehighlight

How To Check That Es6 "variable" Is Constant?

Does anyone know some tricks how to do it? I tried to use try-catch: 'use strict'; const a… Read more How To Check That Es6 "variable" Is Constant?

Can A "=>" Function Lose Context?

I have an ES6 'arrow' function which is used as a (Knockout) subscription handler: this.foo… Read more Can A "=>" Function Lose Context?

Move Method From One Component To Another In React And Still Be Able To Use In Original

I am working to create a small contact app using React with ES6. I had some data displaying in the … Read more Move Method From One Component To Another In React And Still Be Able To Use In Original

Remove Key From All Objects In Array

I have the following array of objects: [{id:1, value:'100', name:'dog' ...}, {id:2,… Read more Remove Key From All Objects In Array

Es6 Calling Super() Doesn't Properly Initialize Parent Class

I have the following code structure, I try to initialize parent class by calling super(), but when … Read more Es6 Calling Super() Doesn't Properly Initialize Parent Class

Within The Standard Javascript Es6 Environment, When Is .tostring() Ever Called?

I only found that the time .toString() is called is with string concatenation and string interpolat… Read more Within The Standard Javascript Es6 Environment, When Is .tostring() Ever Called?

Can Es6 Object Shorthand Notation Be Combined With Regular Object Notation?

With ES6 we can now utilize object shorthand notation for creating objects... var a = 1, b = 2, c =… Read more Can Es6 Object Shorthand Notation Be Combined With Regular Object Notation?

If Re-declaration With Var Will Have Effect On Existed Variable

output show1: Uncaught SyntaxError: Identifier 'x' has already been decalred; show2: 2 2 sh… Read more If Re-declaration With Var Will Have Effect On Existed Variable

Callback Function Is Not Working In Javascript Example

What's wrong in the following callback function example? I am passing some parameters and in th… Read more Callback Function Is Not Working In Javascript Example

Square Bracket Inside Function Definition

In the Node js Documentation, I have seen something like this, fs.readFile(path[, options], callbac… Read more Square Bracket Inside Function Definition

Generating Es6 Module Exports

I'm wanting to programmatically generate the exports for a module, is this possible in es6? Som… Read more Generating Es6 Module Exports

Manipulating A Complex Object Based On An Input Array

I have an complex object and based on an input array I need to modify properties inside of this com… Read more Manipulating A Complex Object Based On An Input Array

Unable To Expose A Component Library In React With Webpack And Babel

I'm creating a small component library for react. Something that can be required like var Compo… Read more Unable To Expose A Component Library In React With Webpack And Babel

What Should The Intermediate Result That A Fetch Request Returns Be Called? A Blob Or Just Response?

when we use fetch in JS to issue a get request, we normally do thing like this fetch(endpoint).the… Read more What Should The Intermediate Result That A Fetch Request Returns Be Called? A Blob Or Just Response?

Extending Es2015 Through Prototype Inheritance

I am making a library where I would like to provide a helper to extend the base class so that users… Read more Extending Es2015 Through Prototype Inheritance