The reason why the el-checkbox state value is modified but the style is not modified
First of all, it is a pit encountered by the recent project
The requirement is: I first adjust the interface to obtain the label values of all unselected checkboxes and render them, and then adjust the interface to obtain the selected checkboxes and render them to the page. After that, I can modify whether to cancel the checkbox select
Problem: After calling the interface, the page is rendered and selected, but I cannot modify the state of the checkbox again, but the checked state of the printed value has changed
The original approach:
// 调用接口后给每一项已选择的对象添加一个checked：true的属性及值，checked是在checkbox中判断是否选择
oneItem.checked = true;
Cause of error: The array is modified, and the data is not bidirectionally bound, so my subsequent modification can no longer change its state
Revise:
// 使用$set， 进行双向绑定
this.$set(oneItem, "checked", true);
Above, checked can be initialized selectively, and can be modified normally later