javascript - Why does the push of the array superimpose the previous ones?

Question

This is my click event. Why does it become new every time I add an element?

Answer 1

...Your arr is in the event and is a new arr every time. .

Answer 2

Because you initialize arr to new data every time var arr = [];
You should initialize arr on the click method

Answer 3

Put var attr= []; outside the function and promote it to a global variable, and you should be fine.