I’m trying to extend one class from another inside the module. The code looks like that: in the result console throws the TypeError: Uncaught TypeError: class heritage this.MyClass is not an object or null referring to line *. Could you help me to fix that? Answer this is only set when you’re calling a method of the object, it’s not
Tag: ecmascript-6
Change property value initialized in constructor outside the class
//clazz.js: //main.js While I expect the num of the c will be 9, but it is still 8. What’s going one? And is it possible to fix that? Answer Replacing the .constructor property of the prototype object doesn’t help with anything. The constructor is Clazz itself, and you are calling it directly through new Clazz() – it doesn’t create an
How to filter array of objects where object has property tagId or keywordId in JS?
I have an array of objects and I am trying to filter it by checking if the object has property tagId or keywordId. I thought about this but not sure if it’s the correct way. Is there better way to achieve the above-explained result and get a filtered array of objects which include either tagId or keywordid? Answer You are
How to avoid re-rendering when i pass an object as prop to child component?
I have parent component with multiple child components. Different types of data will be passed to child components after getting data from api. Some of the components will get object as a prop. I am trying to avoid rerenders in that component. Even if the data is same it is rerendering. How can i avoid this rerenders? Answer As per
alternative approaches to multiple if else conditions [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago. Improve this question I have multiple conditions to be checked and executed like below. I think using switch statement doesn’t make sense here since
ES6 syntax destructuring object + implements interface
I’m going through a code base and ran into complex syntax I understand vaguely (correct me if I’m wrong) something like For each result from the json object, run a function that takes in an object as a param and returns another object. The param implements an interface with this : { text: string; value: any } I don’t understand
Group results of multiple POST API calls
I use the below script to loop through the input (skipping first one) to post some data to my API. Result How can I capture the combined response of both calls into a variable I can use later on in my script? something like var allNum = res.result.number[0]? This is what I want -> Var allTens = “002, 003” Script
How can I create a hook that reacts to an event to load more data?
I am trying to create a functionality where if a user clicks on a LOAD MORE button, it returns more data. I already have some code done but every time I click on the LOAD MORE button, it removes the first 12 items and sets the new 12 items, but I don’t want that, I want to keep the 12
ES6 Classes: Bind “this” to nested functions
I have multiple nested functions in a ES6 Class. Now I wonder how I can easily bind this of the class instance to all the subfunctions. I know of… …but it feels like an awkward solution for multiple nested functions. Does anyone know of a more elegant solution? Answer You can use arrow functions. They work in rather a similar
Iterate through array and call data function from loop
The follow should return 3 different results depending on the array value as it iterates through. I think this question is correct, how can I change it so data{} is a function called from my loop and so a new set of data is posted each time? (difference is the array value) I’m not sure how I would do this