globally, there is an event to be called by default, but before calling, it is necessary to determine whether the subcomponent is set separately. If it is set, use the subcomponent, and if there is no global event by default, think about it and find the method
.https://jsfiddle.net/v1un4r4s.
like this
can be achieved, I provide an idea: set a global variable ifSetFlag (to determine whether the subcomponent is set separately), if the subcomponent sets ifSetFlag:true, otherwise false;, then judge that ifSetFlag, defaults to the global if it is false, and true uses the subcomponent.
Previous: Why did the example of Mini Program audio tune src to play it wrong?
Next: Dijstra algorithm
...
question 1. Why can the event function outside the methods object be triggered when the element triggers the event ? The strange thing is that the button button cannot trigger the event function outside the methods object. Why is that? question 2. ...
vue methods cannot get data value export default { name: "sysAdd", data() { return { form: { name: , region: , date1: , ...
...
for example, a user is in the process of modifying user information, during which the token expires, and then it is redirected to login,. Although it is not common, it is still very embarrassing to encounter. Is there any good way to avoid this situation...
for help. ...
$(document).on( click , -sharpexport ,() => { $.get( workspace export ); }); router.get( export ,function(req, res, next){ var filepath = workspace export export.mp4 ; res.download(filepath, err => { ...
id ...
footer.html footer.js how do I modify the value of footer.html in footer.js? ...
activated userId userInfo id can t get the id value. Do you know how to solve this problem? ...
how does the offsetX restore the attribute value when setting the distance for the element to move? how does the position run off? ...
var field = [{ field: , display: host , visible: true, type: checkbox }, { field: , display: department , visible: true, type: input }] list var list = [{ id: 1, host: 1.1 .1 .1 ,...
the interface is as follows: : I m stuck here right now: I don t know how to get the name in the current point? <div class="col-sm-10"> <div class="form-control" style="cursor:text"> <inp...
[] { "FolderId":"folder_001", "FolderName":"", "FolderLevel":0, "Disable":true, "children":[ { "FolderId":"folder_005", ...
orderID read from response is different from that read from preview what you get in the code is also the data in preview, but the correct orderID should be in response. how to get the data correctly ...
var cloumns = [ ["", "", "", 287589], ["", "", "", 731786], ["", "", "", -4554], ["", "", "...
adds a promise with a chained call, and calls three ajax, . I want to terminate the promise without the next two calls when the first one returns an error. How to do ...
there is a book-list component, on Home that simply lists the covers and names of some books. Each book can click on the cover to go to the BookDetail page, and these functions are fine. Home also has a button to display more books, which takes you to ...
keep-alive, was introduced to save the number of pages in Pagination, which was added on the outermost part of App.vue, but the refresh of the subcomponents encountered a problem. The path of the sub-component is subject :id. I hope that each time t...
js how to get the name of the province where the current user is located, as long as the province asks for advice from its seniors! ...