principle
The principle of template interpolation is to use JavaScript's template strings, and data binding is used to associate data with views, and dynamically generate HTML content during the rendering process.
Specific implementation method
1. Instantiate the Vue object: You need to create a Vue object, write the data and operation functions to be used, and specify the element where the template is located. Vue objects can be created using the new Vue() syntax or the Vue instance constructor.
2. Template content: Write template code in HTML, use {{ }} to wrap variable names or expressions, and will automatically parse and replace the corresponding value.
3. Data binding: Use the v-bind directive to perform data binding to display dynamically generated values in the template. The purpose of v-bind is to bind the properties of HTML elements to the data in the Vue object.
Here is a simple example:
HTML code:
<div >
{{ message }}
</div>JavaScript code:
var app = new Vue({
el: '#app',
data: {
message: 'Hello, Vue!'
}
})Simple instructions
Here we first define a div element, set the id to "app", and then use the message attribute in the Vue object within the element. The initial value of the message is "Hello, Vue!", and then when the Vue object is instantiated, a connection is established with the #app element through the el attribute.
After executing the above code, the browser will display "Hello, Vue!". When we change the value of message, the data on the page will be automatically updated.
Template interpolation and data binding are very important features. It is very important to fully understand their principles and usage, and to master their implementation methods.