The function function in Vue is used to define reusable component methods: define a method object methods and define the function function in it. Parameters can be added after the method name, separated by commas. You can use the return statement to return a value. Arrow functions can be used to simplify single-line functions. Computed properties and listeners are also methods used for specific scenarios.
Usage of function
function in Vue
function
Function It is a way to define component methods in Vue. It allows you to create reusable code blocks and call them in different components.
Usage
methods: { myFunction() { // 函数实现 } }
The above code defines a method named myFunction
, which can be used in the component.
Example
<template> <button @click="myFunction()">Click Me</button> </template> <script> export default { methods: { myFunction() { console.log('Button clicked!'); } } } </script>
In this example, when the user clicks the button, it will call the myFunction
method and log a message in the console .
Parameters
function
Functions can accept parameters by listing them after the function name.
methods: { myFunction(param1, param2) { // 函数实现 } }
Return value
function
A function can return a value. Just use the return
statement.
methods: { myFunction() { return 'Hello world!'; } }
Other features
- Arrow functions: Arrow functions are a more concise way of defining functions. It can be used for single-line functions.
methods: { myFunction: () => { // 函数实现 } }
- Computed Properties: Computed properties are similar to methods, but they are automatically recalculated based on reactive data.
computed: { myComputedProperty() { // 计算属性实现 } }
- Listener: A listener is a function that responds to data changes on a Vue instance.
watch: { myDataProperty(newValue, oldValue) { // 数据变化时的侦听器实现 } }
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