it is said that Internet developers try to not to use foreign keys , so what does the here mean by not using foreign keys ? 1. The meaning here is clear: No foreign key constraints . For example, when deleting data in one table, if you want to casc...
this is the JS code for Index.vue, but when I router-link to another component, the js code for Index.vue executes again. How to make the JS code of each component only for your own use? ...
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the fault type sent from the background is like 0 1 2 3. I want to give it a corresponding content in front of it. If it is passed to 0, the accident will be shown in front of the collision. I d like to ask the boss how to write it. I don t wri...
how do I remove the height of the following style= {{height: 49px }} when I want to hide the {productfobpricedom} component? let msgdom = ; if (productsubjectdom || minorderunitdom || productfobpricedom || modifiershowdom || maskmoduledom) {...
there was a document before, in which I have to add the values automatically, but the values in it are unordered. Whenever I encounter an element with an empty value, I have to find the last value up and increase it. And cycle several times to count how...