this array prints out console.log (this.chooseId) :
output this.chooseId.length output 0?
how should I get his length?
this array prints out console.log (this.chooseId) :
output this.chooseId.length output 0?
how should I get his length?
to get the length of the array is the this.chooseId.length method, there is no doubt about this, and you output this.chooseId.length to 0 because you got it at the wrong time, don't you believe it? You put the print in a setTimeout function. That means you get the length before you add data to this.chooseId.
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