How does ajax in jquery return results instead of callbacks and execute them in the same order?

The default ajax is asynchronous, that is, the downward execution will not be affected when the result is not responded to. If you must return the result, change the async parameter in ajax to false, which means execution in the same order.

Because the default ajax is asynchronous, that is, the downward execution will not be affected when the result is not responded to. So it must be implemented using callbacks. This solution is more efficient.
If you must return the result, change the async parameter in ajax to false, which means executing it in the same order. Implement the following to return the result.
However, this approach is not recommended unless necessary.

function(url,params){ var outdata; $.ajax({ type : "get", async:false, dataType:"json", url : url, data: params, success : function(data){ outdata = data; }, error:function(e){ alert('ajax error'); } }); return outdata; }

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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