In this chapter, we will introduce the Vue3 snooping properties watch we can pass through watch to respond to changes in the data.
The following example is done by using the The following example converts kilometers to meters: In the above code, we created two input boxes When we enter the data in the input box again, Your browser does not support Asynchronous data loading Vue passes through The following example we use
In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress. watch implement counters: 2.12.1. Example ¶
2.12.2. Example ¶
data attribute in kilometers and meters the initial values are all 0. watch object has been created data there are two monitoring methods for the kilometers and meters . watch will listen for changes in data and change its own value in real time. You can take a look at the following video demonstration: video label. Used in asynchronous loading
watch ¶ watch option provides a more general way to respond to changes in data. axios library, which will be described in detail later. 2.12.3. Example ¶
Principles, Technologies, and Methods of Geographic Information Systems
102