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This article mainly introduces "how to use v-model instructions". In daily operation, I believe many people have doubts about how to use v-model instructions. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to use v-model instructions"! Next, please follow the editor to study!

What is Vue.js?

Vue is a progressive framework for building user interfaces. Unlike other large frameworks, Vue is designed to be applied layer by layer from the bottom up. Vue's core library only focuses on the view layer, which is not only easy to use, but also easy to integrate with third-party libraries or existing projects. On the other hand, when used in conjunction with modern tool chains and various supporting class libraries, Vue is also fully capable of driving complex single-page applications.

What is the v-model instruction?

The v-model instruction is: it is responsible for listening for user input events to update data and to do some special handling for some extreme scenarios. Using the v-model instruction, you can achieve two-way data binding between form elements and data in Model, and v-model can only be used in form elements.

How to use the v-model instruction?

1. First create a component and create a new day01.vue under the src/components/ folder.

2. Write p element and input element in day01.vue, and use v-model in input element.

3. Import the day01.vue component in App.vue, and then add the day tag in template.

The code is shown in the following figure:

Effect picture:

Third, use v-model to realize a simple calculator of addition, subtraction, multiplication and division.

1. Implement page layout in template

2. In data, N1 and N2 are defined as the first number and the second number, result is the result, and opt is addition, subtraction, multiplication and division.

3. Handle custom methods in methods and use swith expressions to add, subtract, multiply and divide.

The code is shown in the following figure:

Effect picture:

Fourth, realize the effect of horse racing lantern

1. Give the racing lantern a scroll button and bind a click v-on or @

2. In the event handling function of the button, write the relevant business logic code: get the msg string, then call the substring of the string to intercept the string, intercept the first character and put it in the last position

3. In order to click the button and intercept automatically, put it into a timer.

The code is shown in the following figure:

Effect picture:

At this point, the study on "how to use v-model instructions" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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