Share the small problems you have encountered in writing projects recently

Question 1 ： Component development banner Picture time , Use var prev = $(’.ui-slider-arrow .left’,ui); In this way, it doesn't get the element I want

1. this Point to the caller of the function , stay Uislider In the method ,this Point to .ui-slider, take this Assign a value to a variable ui.
   for example ：var wrap= $(’.ui-slider-wrap’,ui); This code means in .ui-slider Select the .ui-slider-wrap Elements .

2. The definition is consistent with the name when calling
   
   My problem is that the selector is incorrectly written （ The problem is relatively retarded ）
   
   Here mine ui-slider stay HTML Structure is a class , The right thing to do is $(’.ui-slider’).Uislider();
   The screenshot below is html structure
   
   Question two ： I put these codes , After all the modifications , It is found that the picture switching cannot be realized by clicking the small round dot

Found the problem below

Use here a Label the origin , Be sure to give a Labeled href Attribute addition # value , perhaps javascript:0 Let it remove the default behavior