Vue data dynamic addition and dynamic binding ideas (pictures and texts)

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Let’s start with the case

First of all, let’s analyze it. When selecting a subject, the following also adds the full mark value setting for the subject.

The idea of ​​writing jquery before: create a dom node when checked, and then append the dom node to the parent node. The project interacts in a separated manner. In this way, the full score value of the set subject It's out of bounds. Go one step further: Bind all the inputs that set the full score value first, and then control the display and hiding. In this way, the purpose is achieved, but once the option is obtained from the background, once the background is changed, it will be changed accordingly.

Make full use of the data-driven view idea:

Code snippet

1. Description: What this function does, To determine whether the array contains the value passed in by the function, here use the traversal method to loop through the array to see if the subject value of the object in the array is equal to the value passed in. If it is equal, it means that the array contains this item, and It means that this subject is already checked, and it needs to be deleted. Here, the splic method (Vue's mutation method) is used to delete it, directly changing the value of the original array, and sending Vue to update the view.

2. Description: Define the array of full score value loop

3. Description: This array is the data of the above CheckBox

##4. Description: Detailed writing method of v-for loop

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