Vue3 function encyclopedia: a complete introduction to all functions in Vue3

Vue3 is one of the most popular frameworks in front-end development, and its main development language is JavaScript. Vue3 has many advantages, such as efficiency, speed, and ease of learning, and can help developers implement complex web applications more easily.

Vue3 contains a large number of functions that can help developers better implement application logic processing and quickly debug and modify applications. This article will give a complete introduction to all functions in Vue3 so that developers can better master the usage skills of Vue3.

1. Core functions in Vue3:

1. reactive: Convert an ordinary JavaScript object into a responsive object. This function accepts a normal JavaScript object as a parameter and returns a reactive object.
2. ref: Used to create responsive objects. The value of this object can be of any type. This function receives an initial value as a parameter and returns a reactive object.
3. readonly: Create a read-only version of an object. This function receives an object as argument and returns a read-only reactive proxy.
4. toRef: Convert an ordinary JavaScript object property into a ref responsive object.
5. toRefs: Convert a responsive object into a set of ref responsive objects.
6. shallowRef: Create a shallow reactive object and will not track nested properties inside the object.
7. isRef: Determine whether an object is of ref type.

2. Common functions in Vue3:

1. computed: Create a computed property. This function receives a compute function as a parameter and returns a reactive proxy.
2. watch: Observe changes in a reactive object and execute the specified callback function when changes occur.
3. watchEffect: Similar to the watch function, used to observe changes in responsive objects. The difference is that the watchEffect function does not need to specify the properties to be observed, it will automatically track changes in all observable objects.
4. effect: Used to track the responsive dependency of a function and execute the callback function when the dependency changes.
5. markRaw: Mark an object as "non-responsive" so that it becomes a normal object and will no longer be tracked by the proxy.
6. defineComponent: Define a component. This function receives two parameters: the component object and the component options.
7. h: Function used to create virtual DOM nodes.

3. Event-related functions in Vue3:

1. onMounted: Execute the callback function when the component's mounted life cycle function is executed.
2. onBeforeMount: Execute the callback function before the component's beforeMount life cycle function is executed.
3. onUnmounted: Execute the callback function when the component's unmounted life cycle function is executed.
4. onBeforeUnmount: Execute the callback function before the component's beforeUnmount life cycle function is executed.
5. onUpdated: Execute the callback function when the component's updated life cycle function is executed.
6. onBeforeUpdate: Execute the callback function before the component's beforeUpdate life cycle function is executed.
7. nextTick: Execute the callback function before the next UI rendering cycle.

4. DOM operation function in Vue3:

1. ref: used to obtain DOM nodes. This function receives a parameter, which represents the $ref string of the DOM node to be obtained.
2. setInnerHTML: used to set the innerHTML attribute of the element, which can be used to dynamically generate HTML code.
3. setAttribute: used to set attributes of elements.
4. removeAttribute: Attribute used to delete elements.
5. createComment: used to create comment nodes.
6. createElement: used to create element nodes.
7. cloneNode: used to clone a node.

The above are all the functions in Vue3, covering the core functions, general functions, event-related functions and DOM operation functions of Vue3. After mastering these functions, developers can use the Vue3 framework more flexibly to better help realize the various needs of web applications. At the same time, in the actual development process, it is necessary to combine specific scenarios and applications and use these functions flexibly to truly play their role.

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