Focus on the input box and display the drop-down box

15Mar2018

This time I will bring you how to achieve the linkage effect between the input box and the drop-down box. What are the precautions for realizing the linkage effect between the input box and the drop-down box? The following is a practical case, let's take a look.

16May2016

The input input box hides or displays text when it gains or loses focus. This focus effect must have been seen by many friends when filling out forms. This article uses jquery to implement the following. Interested friends can refer to it.

16May2016

This article mainly introduces the method of linking the js drop-down selection box and the input box to add the selected value to the input box. It involves related techniques of onchange events and page element traversal in javascript. It has certain reference value. Friends in need can refer to it.

24May2023

In the process of developing front-end business using the Vue framework, we often encounter multi-level linkage drop-down boxes. At this time, we will use the select element to implement it. However, in multi-level linkage scenarios, we sometimes need to clear the options in the multi-select box when the drop-down box options change, so that the user can re-select the relevant options. This article will introduce how to implement the function of clearing the options in the multi-select box when the drop-down box options change in Vue. 1. Requirements Analysis In actual projects, we often encounter multi-level linkage business requirements. For example, we need to select countries, provinces, and cities.

02Jul2018

This article mainly introduces the effect of changing the input box text and displaying the drop-down list through ajax. Friends who need it can refer to it.

16May2016

jQuery implementation code for getting and setting the select drop-down box value. Friends who need it can come here for reference. I hope it will be helpful to everyone.

06Sep2016

I want to write something like this with a drop-down box. When a value is selected, the currently selected value is displayed in a div. When switching other drop-down options, the value in the div will also change. This is my code, but it doesn't work. What's wrong? {Code...} What's wrong?

25May2023

Vue is a popular JavaScript framework that is often used to build single page applications (SPA). In Vue, a drop-down box is a common UI component that can be used to allow users to select one or more options. However, sometimes we encounter such a problem: the first item of the drop-down box is not displayed. This article will describe common solutions. 1. Check the data source. Generally speaking, the options of the drop-down box are obtained from the data source, such as an array or an API interface. If the first item in the data source is incorrect or has a null value, then in the drop-down box