I couldn’t find a guideline to implement this. How would you add data to errors bag from parent component and listen to the particular error from child components to show something conditionally? I’ve added the error to the errors bag from the parent component like the following: Now, from the chi…
Tag: javascript
How can I avoid nested ternary expressions in my code?
I have code like this. How can I write it in cleaner, more elegant way using functional programming in JavaScript? I want to get rid of nested ternary expressions. Any ideas? This is rest of that code: EDIT: Answer Yes, but my linter is not happy: 44:16 error Do not nest ternary expressions [no-nested-ternary…
Is there something similar to C# regions in JavaScript? Visual Studio 2017
I am doing work for somebody who would like their JavaScript library organized into categories: CRUD functions, Form functions, etc. They really like the utility of regions in C# and are asking for this in their JavaScript file. Any suggestions? I am using Visual Studio 2017 and Team Foundation Server. Answer…
Display data repeatedly
I’m working on a website where I’m showing data from my MySQL database. The data in the database is added every minute and I want to print that value live on my website. I’m using the following PHP code for a random number: How can i get this number to keep refreshing every minute without re…
Struggle with chaining of promises in react application
JavaScript, React – sending multiple simultaneous ajax calls struggling with promises. Basically I want to chain the calls, if one server call completes then only do next call, and collect the successful response of calls from endpoint /pqr made inside makeServerCalls. Error: expected to return a value …
How to format JavaScript date to mm/dd/yyyy?
Im getting the date like ‘Wed Nov 08 2017 00:00:00 GMT-0800 (Pacific Standard Time)’ and putting the value in an input. Is there a way to parse the datetime into a date, add five days to it, and then format it like mm/dd/yyyy? I made a https://jsfiddle.net/ax6qqw0t/ Answer
Iterate over array of objects in Typescript
I need to iterate over the array of objects in angular 2 and limit the string length display for a particular key in the object. I need to limit the prod_desc length to (say) 10 characters while displaying for which I have used: Eg: Answer You can use the built-in forEach function for arrays. Like this: Your …
Call parent method with component
I have a component and want to add a click listener that runs a method in the parent template in Vue. Is this possible? Answer Directly from the Vue.js documentation: In Vue, the parent-child component relationship can be summarized as props down, events up. The parent passes data down to the child via props,…
How to remove ESlint error no-unresolved from importing ‘react’
no-unresolved https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-unresolved.md After installing eslint-import-resolver-webpack My .eslintrc config My package.json Webpack Answer You can add an option to ignore case: This thread at github also describes how the linter was checking case…
Modifying Shopify Polaris Styles – Reactjs
I am trying to modify Shopify Polaris Button components colors for React, I tried to change style.css file but nothing happened. Any idea how to do so? App.js I am trying to modify node_modules/@shopify/polaris/styles.css , but it does not make ay effect to button color. Answer The Polaris design system is me…