citySelect | npm install 是基于gulp ， 需要安装依赖 ， 支持es6语法 | Build Tool library

I have some problems with a project. I want to display some data, that I retreive from an API, in a dropdown menu. I used the .map() function and jsx to display everything, but nothing is working, the dropdown menu stay empty whereas a console.log(cities) show me that my array is filled.

I am trying to fill a form up. here is the html for the drop down list

I am, basically, answering the question here, but perhaps someone has another idea. You can use an onpopstate function, but I find this much simpler to deal with and cross-browser compatible, even with old browsers.

I have a drop-down select box that is populated by a database query. In this case, it has only found one relevant city. Selecting that city, which takes the user to another page, then pressing the Back button, returns the user to the page with the selection still in the selected state, which prevents it from being selected again, unless another selection is made first. So I added an onClick event to change the Selected default before leaving the page.

HTML

I am writing a mobile app in flutter, I get a json and I convert it into an object as in the following class:

I have an interactive map rendered with leaflet in a shiny dashboard in R. The dashboard also contains two dropdown menus created with selectizeInput, where the options available in the second dropdown depend on the selection in the first dropdown. In the toy example below, the second dropdown presents a list of cities, which depends on the country selected in the first dropdown.

I would like to specify the selections in these two dropdown menus by clicking on the city in the map. In the code below, this works once you have chosen a country. For example, if I select "Australia" from the first dropdown and then click on Australian cities in the map, the selected city in the second dropdown updates correctly. However, if I then click on a city in New Zealand, "Auckland" (the first city in the New Zealand list) is selected in the city dropdown regardless of which New Zealand city I actually clicked on. Subsequent clicks on cities in New Zealand then work correctly.

How can I get the city dropdown to update correctly the first time I click on a city in a different country to that currently selected in the country dropdown?

Note: This is only intended as a simple, reproducible example of the functionality that I require.

I'm trying to make a check if a form field is pristine or not. I do this from the getter in Vuex and not from the component (which I need to keep clean from logic). Somehow it gives the error:

Uncaught (in promise) TypeError: (intermediate value)(intermediate value).city is not a function

getters.js

I'm trying to use Context API with Typescript and nothing is working properly, I'm very confused, I already checked a lot of articles on the internet and it still can't give me an understanding of this matter.

I have the following piece of code in my shiny server:

I'm using this library for autocomplete select, and in my logic, I also want to trigger require validation (from vuelidate library) on the fly. I want to trigger the require validation rule when the user focuses out the input and when the user selects some value from the suggestion list.

And for some reason when I'm selecting a value by the first time from the suggestion list it's triggering focusout event not a select, probably b-z list is out of input focus, but when I'm selecting an item from the list by the second time it's triggering select event not focusout (as it should). NOTE: vue trigger select event only when I select value for the second time, first, third and all next times it's always triggering focusout event.

Question: why it's not triggering select event and how to force triggering it??

Code snippet: